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Explorer AP380Autopilot

Installation and Operation Manual

3Northstar Explorer AP380 System Installation and Operation Manual

FCC Statement

Note: This equipment has been tested and found to comply with the limits for a Class B digital device,

pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against

harmful interference in a normal installation. This equipment generates, uses and can radiate radio

frequency energy and, if not installed and used in accordance with the instructions, may cause harmful

interference to radio communications. However, there is no guarantee that interference will not occur in

a particular installation. If this equipment does cause harmful interference to radio or television reception,

which can be determined by turning the equipment off and on, the user is encouraged to try to correct

the interference by one or more of the following measures:

Reorient or relocate the receiving antenna.

Increase the separation between the equipment and receiver.

Connect the equipment into an output on a circuit different from that to which the receiver is

connected.

Consult the dealer or an experienced technician for help.

A shielded cable must be used when connecting a peripheral to the serial ports.

IMPORTANT SAFETY INFORMATION

Please read carefully before installation and use.

DANGER

This is the safety alert symbol. It is used to alert you to potential

personal injury hazards, Obey all safety messages that follow this symbol to

avoid possible injury or death.

! WARNINGWARNING indicates a potentially hazardous situation which, if not avoided,

could result in death or serious injury

CAUTION!CAUTION indicates a potentially hazardous situation which, if not avoided,

could result in minor or moderate injury.

CAUTIONCAUTION used without the safety alert symbol indicates a potentially

hazardous situation which, if not avoided, may result in property damage.

DISCLAIMER: It is the owner’s sole

responsibility to install and use the instrument

and transducers in a manner that will not cause

accidents, personal injury or property damage.

The user of this product is solely responsible for

observing safe boating practices.

BRUNSWICK NEW TECHNOLOGIES INC. AND ITS

SUBSIDIARIES AND AFFILIATES DISCLAIM ALL

LIABILITY FOR ANY USE OF THIS PRODUCT IN A

WAY THAT MAY CAUSE ACCIDENTS, DAMAGE OR

THAT MAY VIOLATE THE LAW.

Governing Language: This statement,

any instruction manuals, user guides and

other information relating to the product

(Documentation) may be translated to, or

has been translated from, another language

(Translation). In the event of any conflict

between any Translation of the Documentation,

the English language version of the

Documentation will be the official version of the

Documentation.

This manual represents the Explorer AP380

as at the time of printing. Brunswick New

Technologies Inc. and its subsidiaries and

affiliates reserve the right to make changes to

specifications without notice.

Copyright © 2006 Brunswick New Technologies

Inc. Northstar™ is a registered trademark of

Brunswick New Technologies Inc.

4 Northstar Explorer AP380 System Installation and Operation Manual

Installation Contents

Important ................................................................................................................................................ 5

1 Introduction .......................................................................................................................................... 6

1-1 A typical Explorer AP380 system installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61-2 Using the Explorer AP380 system with other instruments . . . . . . . . . . . . . . . . . . . . . . . . . 7

2 Explorer AP380 system hardware ........................................................................................................... 8

2-1 What comes with your Explorer AP380 system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82-2 Other parts required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3 Installation ............................................................................................................................................ 9

3-1 Installation sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93-2 Installation guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103-3 Installing the MCU600 (Main Control Unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113-4 Installing the power supplies and steering drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123-5 Installing the RFU (rudder feedback unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173-6 Installing the Compass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .203-7 Installing the Gyro . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .223-8 Installing the Explorer AP380 display unit and other instruments . . . . . . . . . . . . . . . .23

4 Dockside setup ..................................................................................................................................... 27

4-1 Start dockside setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274-2 Calibrating the rudder feedback unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5 Sea trials .............................................................................................................................................. 28

5-1 Calibrating the compass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .285-2 Aligning the compass and the rudder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Appendix A - Specifications - MCU600 ...................................................................................................... 29

Appendix B - Specifications - AP380 Display ............................................................................................. 30

Appendix C - User data ............................................................................................................................ 31

Operation Section .................................................................................................................................. 34


Important

It is the owner’s sole responsibility to install and use the instrument and transducer/s in a manner

that will not cause accidents, personal injury or property damage. The user of this product is solely

responsible for observing safe boating practices.

The choice, location, and installation of all components in any AP380 system is critical. If installation is

not correct, the unit can not perform at its designed potential. If in doubt, consult your Northstar dealer.

Ensure that any holes that cut are in a safe position and will not weaken the boat’s structure. If in doubt,

consult a qualified boat builder.

Using the Explorer AP380 system : The Explorer AP380 system is intended as an aid to save a helmsman from having to steer for long

periods of time, not as the main means of steering the boat.

The Explorer AP380 system is not intended for use in extreme weather, in adverse conditions or in

water near other boats, dangerous waters or land.

The Explorer AP380 system can not control the boat better than a helmsman. In adverse conditions

steer the boat manually.

Never leave the helm unattended. Keep a watch at all times. The helmsman should always monitor

the course of the boat and the Explorer AP380 system and be ready to resume steering the boat

manually.

The performance of the Explorer AP380 system can be affected by the failure of a part,

environmental conditions, improper installation and use.


To verify that the Explorer AP380 system is

operating correctly, perform sea trials (see

section 5).

Cleaning and maintenanceClean the parts of the Explorer AP380 system with

a damp cloth or mild detergent. Avoid abrasive

cleaners, petrol or other solvents.

Do not paint any part of the Explorer AP380

system except for the cables.

1 IntroductionUsing this manual

This manual describes how to install and set up

the Explorer AP380 system. Refer to the Explorer

AP380 Operation Section for information on how

to operate the Explorer AP380 display unit.

To install a Explorer AP380 system, you must

perform installation, dockside setup and sea trials

(see sections 3, 4 and 5).

To fully set up a Explorer AP380 system after

a part has been changed or if a problem is

suspected, perform dockside setup and sea trials

again (see sections 4 and 5).

Manual helm

GPS

NMEA

SPEED WIND Display

unit

Light duty

Heavy duty

12 V DC

Power supply

Gyro

Compass

MCU600

NavBus

Clutch drive(optional)

Parts supplied with Explorer AP380 system

Other parts required

Optional parts

Rudder

feedback

unit

Rudder

Power switch or

switches and

power protection

Rudder

control

Key

1-1 A typical Explorer AP380 system installation

Optional instruments

Note: Above shows typical installation

only. Please refer to the information

supplied with your drive for further

information.

More

display

units

Steering

drive


1-2 Using the Explorer AP380 system with other instruments

1-2-1 Using other instrumentsThe Explorer AP380 system can use data from

these instruments:

GPS: A GPS or chartplotter, such as a Northstar

Explorer 500 series chartplotter must be

connected to the Explorer AP380 system for the

AP380 to operate in GPS mode (see the Explorer

AP380 Operation Section).

Note: GPS must be via NMEA input.

WIND: A wind instrument, such as a

Northstar WIND series, must be connected

to the Explorer AP380 system for the AP380

to operate in WIND mode (see the Explorer

AP380 Operation Section).

SPEED: A speed instrument, such as:

Northstar’s SPEED with a paddlewheel

speed sensor

or a GPS or chartplotter, such as

Northstar’s Explorer 500 or Explorer 660

series can be connected to the Explorer

AP380 system to increase steering

accuracy.

Note: The speed from a paddlewheel sensor is

the speed that the boat is moving through the

water. The speed from a GPS is the speed over

the ground. If there is a water current then these

two speeds will be different. If the Explorer AP380

system is connected to an instrument with a

paddlewheel sensor and to a GPS, then the

Explorer AP380 system will automatically use the

speed from the paddlewheel sensor instrument.

1-2-2 NavBusNavBus is a Northstar proprietary system that

allows systems of multiple instruments to be

built using a single set of transducers. When

instruments are connected by NavBus:

If you change the units, alarms or calibration

in one instrument, then the values will

automatically change in all other instruments

of the same type.

Each instrument can be assigned to a group

of instruments, called a NavBus group (see

NavBus group in the Setup > Comms menu, in

the Explorer AP380 Operation Section).

If you change the backlight in an instrument

in group 1, 2, 3 or 4 then the backlight

will automatically change in the other

instruments in the same group. If you change

the backlight in an instrument in group 0

then no other instruments are affected.

If an alarm sounds, mute it on any instrument

which can display that alarm.

For more information, refer to the NavBus

Installation and Operation Manual.

Note: GPS must be via NMEA input.

NavBus and the Explorer AP380 system The Explorer AP380 system will automatically

work with additional Explorer AP380 displays.

The Explorer AP380 system can receive wind

data from Northstar’s WIND over NavBus.

The Explorer AP380 system can receive speed

data from Northstar’s SPEED over NavBus.

1-2-3 NMEANMEA is an industry standard, but is not as

flexible as NavBus as it requires dedicated

connections between instruments. The Explorer

AP380 system has one NMEA input port and one

port that can be configured to be an input or an

output (See Explorer AP380 Operation Section).

Explorer AP380 system NMEA inputsGPS: The Explorer AP380 system can receive

NMEA GPS data from a compatible GPS or

chartplotter, such as Northstar’s Explorer 500

series chartplotter:

XTE (from APA, APB or XTE sentences) is

required for the Explorer AP380 system to use

GPS mode

BRG (from APA sentences) and BOD (from APA

or APB sentences) are optional and improve

performance

COG (from VTG sentences) is optional and can

be displayed.


2 Explorer AP380 system hardware

MCU600 (Main Control Unit)

Gyro, with 10 m

(33 ft) attached cable

Protective cover for

display unit

Explorer AP380 Display unit

Compass, with 10 m

(33 ft) attached cable

WIND: The Explorer AP380 system can receive

NMEA wind data from a compatible wind

instrument:

True or apparent wind direction (from MWV

sentences) is required for the Explorer AP380

system to use Wind mode.

SPEED: The Explorer AP380 system can

receive NMEA speed data from a compatible

paddlewheel or GPS instrument:

SOG (from VTG sentences) is optional and

improves performance.

Note: If the Explorer AP380 system is connected

to a Northstar series wind or speed instrument

using NavBus, then the Explorer AP380 system will

automatically receive and use the wind or speed

data, and the NMEA connection need not be wired.

2 mm (#14) twin

stranded cable for high

current wiring

RFU - Rudder feedback unit

2-1 What comes with your Explorer AP380 system

Explorer AP380 system NMEA outputsThe NMEA 2 port can be configured to be an

input or to be output:

either heading (HDG & HDT) and rudder

angle (RSA) at once per second

or heading (HDG) at ten times per second

(see NMEA mode in the Setup > Comms menu, See

Explorer AP380 Operation Section).

Documentation

• Warranty

• Display unit mounting template

• This Installation/Operation

manual

Additional hardware

• Mounting hardware

• Cable cover

• Strain relief

• Spare fuses


The recommended installation sequence is:

1 Read this manual and the documentation

that comes with the other parts.

2 Plan the installation: select where the

equipment and wiring will be installed (see

section 3-2).

3 Install the MCU600 (see section 3-3).

4 Install the steering drive and wire the heavy

duty and light duty power supplies

(see section 3-4).

5 Install the rudder feedback unit

(see section 3-5).

6 Install the compass (see section 3-6).

3 Installation

3-1 Installation sequence

7 Install the gyro (see section 3-7).

8 Install the display unit and any other marine

instruments that will be used with the

Explorer AP380 system (see section 3-8).

9 Carry out the dockside setup

(see section 4).

10 Carry out the sea trials (see section 5).

If you are unsure where a part should be

installed, mount and wire the part temporarily,

without cutting holes in the boat. After the sea

trials have been completed, install and wire the

part permanently.

Power supply: The Explorer AP380 system

requires two power supplies, both nominally 12

V DC:

A heavy duty supply for the steering drive

A light duty supply for the Explorer AP380

system electronics and display unit; this

supply also powers any additional display

units and other instruments.

The power supplies require one or two switches

and fuses or circuit breakers (see section 3-4).

Steering drive: The Explorer AP380 system can

power a hydraulic pump, constantly running

pump set, hydraulic linear drive or mechanical

drive rated at 12 V DC and up to 20 A.

Rudder linkage: To link rudder to rudder

feedback unit (see section 3-5).

For wiring, see Select Wire Table in section 3-4-2.

External beepers or lights (optional ):

The external output is switched to ground,

30 V DC and 250 mA maximum. If the beepers

and lights require more than 250 mA total, fit a

relay.

Other marine instruments (optional): Wind,

speed or GPS instruments can be connected (see

section 1-2).

Other parts: For systems of several instruments,

wiring and connectors are required. Northstar

junction boxes can simplify wiring several

Northstar instruments together (see section 1-2

or the NavBus Installation and Operation Manual).

Coupling connectors and 10 m (33 ft) extension

cables are available to extend the rudder

feedback unit, compass or gyro cables. Do not fit

more than one extension cable to each unit.

For more information, consult your

Northstar dealer.

2-2 Other parts required

Correct installation is critical to the performance

of the unit. It is vital to read this manual and the

documentation that comes with the other parts

before starting installation.

The MCU600 is not waterproof. Mount the

unit in a dry place.

The Explorer AP380 system display unit is

waterproof.

The compass, gyro and rudder feedback

unit are completely waterproof.

Ensure that any holes that you cut will not

weaken the boat’s structure. If in doubt, consult

a qualified boat builder.


3-2 Installation guide

This is a general guide for locating and wiring the parts of the Explorer AP380 system. The instructions

for a particular part may have additional requirements.

3-2-1 Location guide Do not mount any part where it can be used

as a handhold, where it will interfere with the

operation of the boat or where it might be

submerged.

Do not mount any part where it will interfere

with launching or retrieving

the boat.

Do not mount any part within 0.5 m (20”) of

the plane of a radar antenna.

Mount the compass and gyro:

At least 1 m (3 ft) away from sources of

electrical signals or noise, such as the

batteries, high-current cables, other boat

cables, engines, fluorescent lights, power

inverters, radio or radar transmitters and

antennas.

At least 1 m (3 ft) away from equipment

containing a magnet, such as a compass

or speaker.

3-2-2 Wiring guideThe Explorer AP380 system has two kinds of

cables:

The heavy-duty power supply and steering drive

usually require high-current cables:

Select the wire gauge from the wire size table

(see section 3-4-2).

Fit high-current cables at least 1 m (3 ft) away

from other electronic devices in

the boat.

Keep the cables as short as possible.

Twin 2 mm (#14) cable is supplied with the

Explorer AP380 system and can be used for

the high current cable if its gauge is suitable.

All the other cables are low-current:

Fit low-current cables at least 1 m (3 ft) away

from sources of electrical signals or noise,

such as the high-current cables, other boat

cables, engines, fluorescent lights, power

inverters and radio or radar transmitters and

antennas.

If the cable for the rudder feedback unit,

compass or gyro is too long, do not shorten

the cable; instead coil the cable up near the

main control unit.

The cable for the rudder feedback unit,

compass or gyro can be extended by

adding a 10 m (33 ft) extension cable and

coupling connector. Do not fit more than one

extension cable to each unit.

When fitting any type of cable:

Do not crush, pinch or strain the cable.

Secure the cable at regular intervals.

Ensure no connectors or exposed terminals

are in the bilge.


3-3 Installing the MCU600 (Main Control Unit)

Physical

IMPORTANT: 200 mm

(7.87”) clearance required

for cover removal

InstallationFind a suitable location for the unit:

In a dry, cool place; if possible not the engine room.

Close to the high-current power supply and the steering drive, to reduce the length of the high

current wiring.

Accessible for installation and service.

If possible on a vertical panel which does not vibrate.

Follow the location guide (see section 3-2-1).

Mount the unit with the cable connectors at the bottom or to one side, using the screws provided.

Do not mount the unit with the connectors at the top, because dust or moisture might enter the unit.

200 mm (7.87”)

IMPORTANT: 60 mm (2.36”)

clearance required for cables

200 mm (7.87”)

140 mm (5.10”)

60 mm (2.36”)

Screws 90 mm (3.54”) apart Screw holes 184 mm (7.24”) apart

55 m

m

(2.1

6”)

12

3

1 RFU

2 Gyro

3 Compass /

Heading Sensor


3-4 Installing the power supplies and steering drive

3-4-1 Installing the power suppliesThe MCU 600 system requires a light duty and a heavy duty power

supply, both 12 V DC.

Note:

Keep all wiring as short as possible.

For the heavy duty supply, use the wire size given in the table

(see section 3-4-2).

Follow the wiring guide (see section 3-2-2).

1 2 3 4 5 6 7 8

Fit strain relief

Connector cover

Light duty

power

Heavy duty

power

Fuse 1 A

12 V DC power

supply, current to

suit drive

Power supply: one switch configuration

Choose this configuration to have one switch to

turn the Explorer AP380 system and any other

instruments on and off.

Circuit breaker or fuse and

switch, current rating to suit

steering drive

Power supply: two switch configuration

Choose this configuration to be able to turn the

drive power off and leave other instruments

powered.

Fit strain relief

Connector

cover

Switch

Heavy duty

power

Fuse 1 ALight duty

power

Note: If powering more than three extra display units or other series instruments, fit another switch

and fuse for the light duty power supply for these extra instruments

12 V DC power

supply, current to

suit drive

Circuit breaker or fuse

and switch, current

rating to suit steering

drive

MCU600

1 2 3 4 5 6 7 8


3-4-2 Installing the steering driveInstall the steering drive according to one of the diagrams on the following pages.

Note

Keep all wiring as short as possible.

Use the wire size given in the table below.

Follow the wiring guide (see section 3-2-2).

Wire less than #10 gauge will not fit directly into the four way terminal block. Fit ferrules or

reterminate the wire with #10 gauge wire.

If more than one wire is to be fitted to a terminal of the four way terminal block, join the wires

together in a suitable way.

Wire size tableTo choose a wire gauge for an installation:

1 Measure the length of twin cable required, i.e. the distance from the main control unit to the heavy

duty power supply or to the drive.

2 Choose the column with the cable length and the row with the circuit current. The intersection of

the row and column gives the preferred (minimum) cable wire gauge for less than 3% voltage drop

in a 12 V system.

Cable length (from main control unit to power supply or to drive)

2.5 ft0.7 m

5 ft1.5 m

7.5 ft2.2 m

10 ft3 m

12.5 ft3.7 m

15 ft4.5 m

17.5 ft5.2 m

20 ft6 m

Cu

rre

nt

1 amp#18

0.75 mm#18

0.75 mm#18

0.75 mm#18

0.75 mm#18

0.75 mm#18

0.75 mm#18

0.75 mm#18

0.75 mm

2 amp#18

0.75 mm#18

0.75 mm#18

0.75 mm#18

0.75 mm#18

0.75 mm#16

1.5 mm#16

1.5 mm#16

1.5 mm

3 amp#18

0.75 mm#18

0.75 mm#18

0.75 mm#16

1.5 mm#16

1.5 mm#16

1.5 mm#14

2.5 mm#14

2.5 mm

4 amp#18

0.75 mm#18

0.75 mm#16

1.5 mm#16

1.5 mm#14

2.5 mm#14

2.5 mm#14

2.5 mm#12

4 mm

5 amp#18

0.75 mm#16

1.5 mm#16

1.5 mm#14

2.5 mm#14

2.5 mm#12

4 mm#12

4 mm#12

4 mm

6 amp#18

0.75 mm#16

1.5 mm#16

1.5 mm#14

2.5 mm#12

4 mm#12

4 mm#12

4 mm#10

6 mm

7 amp#18

0.75 mm#16

1.5 mm#14

2.5 mm#14

2.5 mm#12

4 mm#12

4 mm#10

6 mm#10

6 mm

8 amp#18

0.75 mm#16

1.5 mm#14

2.5 mm#12

4 mm#12

4 mm#10

6 mm#10

6 mm#10

6 mm

9 amp#18

0.75 mm#16

1.5 mm#14

2.5 mm#12

4 mm#12

4 mm#10

6 mm#10

6 mm#10

6 mm

10 amp#18

0.75 mm#14

2.5 mm#12

4 mm#12

4 mm#10

6 mm#10

6 mm#10

6 mm#8

10 mm

15 amp#16

1.5 mm#12

4 mm#12

4 mm#10

6 mm#10

6 mm#8

10 mm#8

10 mm#6

16 mm

20 amp#14

2.5 mm#12

4 mm#10

6 mm#8

10 mm#8

10 mm#6

16 mm#6

16 mm#6

16 mm


Fit strain relief

Wiring polarity does

not matter.

Motor

MCU600

Example of hydraulic steering with hydraulic help pump.

In the Setup > Vessel menu (See Explorer AP380 Operation Section), set Drive Type to Motor.

Example of mechanical steered power vessels with hydraulic linear drive for sailing boat

In the Setup > Vessel menu (See Explorer AP380 Operation Section), set Drive Type to Motor.

Motor

Clutch

relay

coil

1N4002 diode or equivalent

Fit close to relay coil

Connector cover

No connection

MCU600

Heavy duty power (see

section 3-4-1)

Fit strain relief


not matter.


section 3-4-1)

Note: Clutch relay coil must draw

less than 300mA


Installing a electric drive motor with clutch relay

In the Setup > Vessel menu (See Explorer AP380 system Operation Section), set Drive Type to Motor.

Installing a continuous running pump and solenoid valves.

In the Setup > Vessel menu (See Explorer AP380 system Operation Section), set Drive Type to Spool ground.

Fit strain relief


not matter.

Motor

MCU600

Clutch

coil

1N4002 diode or equivalent. Fit

close to relay coil



Relay coil

MCU600



Relay contacts

Relay coil

Starboard

Port

Motor

Fit strain relief

Heavy duty power (see section 3-4-1)

Heavy duty power (see section 3-4-1)


not matter.

Note: Motor is not

required for engine

PTO systems.

Relay contacts

Note: Relay is required if the clutch circuit

is greater than 300 mA.

Note: Relay is required if the

clutch circuit is greater than

300 mA.

Connector cover

Connector cover


Installing solenoid valves or relays with jog or electric steering

In the Setup > Vessel menu (See Explorer AP380 Operation Section), set Drive Type to Spool ground.

MCU600

Starboard

Port

Fit strain relief

No connection

Jog/steer controls


section 3-4-1)


3-5 Installing the RFU (rudder feedback unit)

Physical

10 m (33 ft) cable

Arm

90 mm

(3.5”)

220 mm

(8.7”)

Base

Linkage to

rudder

Rudder

shaft

Arm rotates freely

around base.

LT8 connector

These two

distances to

be equal.

Connecting rod, with quick

release fittings and lock nuts

each end

End of connecting rod

snaps into one of the

holes on the arm.

Mounting requirementsThese two

distances to

be equal.

Base to be adjacent to

rudder shaft so that this

angle is 90°

Rudder shaft to be

parallel to shaft in

base.

Rudder linkage and

arm to move in the

same plane

Note

The unit is completely waterproof but should not be immersed.

Mount the unit on a panel which does not vibrate.

Follow the location guide (see section 3-2-1).

Adjust position of rod on

arm if required.

Cut connecting rod

if required. Thread = M5


Alignment

The arm can rotate freely around the base. When the rudder is amidships, the arrow on the arm must

point to one of the centre lines on the base.

Centre line

Therefore in an installation, the base can be rotated to two positions. We recommend the position that

has the cable on the opposite side to the connecting rod.

Centre line

Sets of lines

show the two linear

ranges of the unit.Base

Recommended(rudder amidships).

Arrangements

Recommended: U-shaped arrangement with the arm parallel to the length of boat:

Satisfactory: U-shaped arrangement

with arm not parallel to length of boat, for

example:

Not recommended: Z-shaped arrangement,

for example:

If rudder turns too far, the unit might not return to the Z

shape.

Bow of

boat

Bow of

boat

Not recommended, cable can

foul rudder linkage.


Installation1 Find a suitable location and arrangement for the unit as described above.

2 Choose, assemble and fit a suitable rudder linkage.

3 Fit the unit as shown below:

If necessary, mount

base on block to set

height.

Set rudder

amidships.

Rotate base so arrow on arm

points near centre line on base.

Fit two screws provided loosely

in middle of slots.

Rotate base so arrow on arm

points to centre line on base.

Fit third screw provided,

tighten all screws.

Join coupling to

rudder linkage. Snap end into

correct hole in arm.

Ensure rudder is

amidships.

If necessary, cut connecting

rod at this end, then replace

coupling and lock nut.

4 Wire the cable back to the MCU600, following the wiring guide (see section 3-2-2).

MCU600

Plug connector into the RFU socket

Holes in the bulkheads must

be at least 18.5 mm (0.73”)

diameter.


3-6 Installing the Compass

Physical 101 mm, (4”)

Mounting holes for

screws

97 mm, (3.8”)

71 mm, (2.8”)

10 m (32.8 ft) LT8 connector

LocationMount the compass:

At least 1 m (3 ft) away from any steel or

iron boat part, such as:

a steel hull, deck, cabin or steel

reinforcing in ferro-cement hulls

steel equipment such as motors and

cooking equipment

places where steel objects are stored,

such as the anchor locker and storage

lockers

At least 2 m (6 ft) away from equipment with

a magnet and equipment which generates

electromagnetic fields, such as a compass, a

battery, high current wiring, an electric motor

and a radio or radar transmitter or antenna.

As close as possible to the centre of

movement of the boat, to minimise how

much the compass moves when the boat

rocks and pitches. If the compass can not

be mounted at the centre of movement, it is

usually best to mount the compass as low as

possible.

On a vertical panel which does not vibrate.

The unit is completely waterproof but should

not be immersed. The compass is not affected

by other metals, such as stainless steel, copper

or brass. Follow the location guide (see section

3-2-1).

Fibreglass or wood hull and cabin: mount compass at the centre of movement (for planing hulls, the

centre of movement is usually close to the stern):

Steel hull, non-steel cabin: mount compass

1 m, (3 ft) above hull:

Steel hull and steel cabin: mount compass on

a pole 1 m (3 ft) above the hull and at least 1 m

(3 ft) from the cabin:

At least 1 m (3 ft)1 m (3 ft)

1 m (3 ft)


Installation1 Find a suitable location for the unit as described above.

2 Mount the unit with the three screws provided. Use a level to ensure the unit is vertical to within 10°.

Less than

10° 10°


Less than 10° 10°

MCU600

Plug connector into the Compass/HS socket


be at least 18.5 mm (0.73 in)

diameter.

Note

If you move the compass with respect to

the gyro while the power is on, wait for the

heading to stabilize.


3-7 Installing the Gyro

Physical

Mounting holes for

screws

LT8 connector

LocationMount the gyro as close as possible to the centre of movement of the boat, to minimize how much the

gyro moves when the boat rocks and pitches.

Mount the gyro on a panel which does not vibrate.

The unit is completely waterproof but should not be immersed. Follow the location guide (see section

3-2-1).

The Ideal location is at the centre of movement (for planing hulls, the centre of movement is usually

close to the stern).

101 mm, (4”)

97 mm, (3.8”)

71 mm, (2.8”)

10 m (32.8 ft)


Installation1 Find a suitable location for the unit as described above.

2 Mount the unit with the three screws provided. Use a level to ensure the unit is vertical to within 10°.

Less than

10° 10°


Less than

10° 10°

MCU600

Plug connector into the Gyro socket


be at least 18.5 mm (0.73”)

diameter.

Note

If you move the gyro with respect to the compass while the power is on, wait for the heading to

stabilise.

3-8 Installing the Explorer AP380 display unit and other instrumentsThere are two mounting arrangements:

Flush mounting requires a solid panel with

access behind for wiring and mounting screws.

After flush mounting, the display cannot be

tilted or moved after installation to reduce any

unwanted glare or reflections. Carefully select

the best viewing position before installation. This

would generally be in a shaded area.

Flush mounting directions

1 Cut a hole in the bulkhead for the display unit

using the flush mount template as a guide.

2 Drill four holes for the mounting studs using

the flush mount template as a guide.

3 Screw the four studs into the brass inserts in

the back of the display unit.

4 Sit the display unit in place and fit the

washers and nuts to the studs.


Bracket mounting directions

1 Fix the mounting bracket onto the boat using

the four stainless steel screws.

2 Hold the display unit in place in the mounting

bracket. Fit the mounting bracket knobs into

the display unit and do up the knobs loosely.

3 Adjust the tilt of the display for best viewing,

then hand tighten the knobs on the

mounting bracket.

Bracket mounting requires a panel for

mounting the bracket. Ensure that the panel

is not likely to deform and is not subject to

excessive vibration. The bracket can be tilted and

the dispaly can be removed after each use.

Select a position where the display unit will be:

• At least 4" (100 mm) away from the compass.

• At least 12" (300 mm) away from any

radio transmitter.

• At least 4 ft (1.2 m) away from any antenna.

• Easy to read and operate. If possible, mount

the display unit in front of the navigator or to

the right of the navigator because the LCD

display is more readable from these positions.

• Not exposed to the direct sun or water.

• Protected from physical damage during

rough sea passages.

• Easy to access the DC power source.

• Convenient to route the transducer cables.

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Wiring the display unit

MCU600

Display

unit

Display unit cable, Requires 18 mm (0.7”) hole through

bulkhead.

Co

nn

ec

tor

cove

r

Clutch relay out: 8

NMEA2 - in/out: 7

NMEA1 - in: 6

NMEA common: 5

NavBus -, Blue: 4

NavBus +, Orange: 3

Ground, Black: 2

12 V power +, Red: 1

Optional external beepers and

lamps for the external alarm. If the

beepers and lights require more

than 250 mA, fit an external relay.

8-way connector

Green

Light duty power

(see section 3-4-1)

Note

Wire the display unit power wires (red and black wires) to the eight way connector terminals 1 and

2 to ensure the display unit and main control unit have the same light duty power supply.

• Follow the wiring guide (see section 3-2-2).

Yellow (ignition wire)

White (isolate, do not use)

Brown (isolate, do not use)

Plug power cable into the

Black socket on the rear of the

Explorer AP380 display.


Wiring other instruments

MCU600

Display

units

Addtional AP380

display units

Other series

instruments

Units

A GPS, such as a

Northstar Explorer

567

NMEA in/out

NMEA

in & out

GPS NMEA out

GPS NMEA common

Power,

NMEA in

GreenGreen

Beepers and lights

(see previous page)

Green (from one display unit only)

Co

nn

ec

tor

cove

r

Note:

Refer to the instrument’s installation manual for more wiring information.

If adding more than three display units or other series instruments, fit a separate light-duty power supply

for the extra instruments (see section 3-4 or the instrument’s installation manual)

The external alarm outputs (green wire) of Northstar series instruments and 500 series chartplotters

can be connected together to drive the external beepers and lights.

In systems with several other instruments, we recommend using NavBus junction boxes to simplify

wiring (see the NavBus Installation and Operation Manual).

• Follow the wiring guide (see section 3-2-2).

Clutch relay out: 8

NMEA2 - in/out: 7

NMEA1 - in: 6

NMEA common: 5

NavBus -, Blue: 4

NavBus +, Orange: 3

Ground, Black: 2

12 V power +, Red: 1

Light duty power

(see section 3-4-1)

Clutch, optional

(see section 3-4-2)

GPS


4 Dockside setup

1 Turn the Explorer AP380 system on (See

Explorer AP380 Operation Section). If the rudder

moves, immediately turn the power off.

If you try to enter AUTO and the rudder

feedback unit or compass have not yet been

calibrated, then the Explorer AP380 system

will displays an error.

2 If the Explorer AP380 system has been used

before, reset all user data to the factory

defaults. Go to Factory reset > Both in the

Setup System menu (See Explorer AP380

Operation Section).

Perform the dockside setup:

after installing a Explorer AP380 system (see section 3)

after a part has been changed or if a problem is suspected

After dockside setup, perform the sea trials (see section 5 ).

4-1 Start dockside setup

4-2 Calibrating the rudder feedback unitThis procedure matches the rudder feedback unit to the rudder.

Note

To exit the calibration at any time, press ESC.

If you do not move the rudder as prompted or the rudder feedback unit is not working then the

Explorer AP380 system can not finish the calibration. The Explorer AP380 system will display an error.

Press ESC, fix the problem and repeat the calibration.

In normal operation, the Explorer AP380 system will not turn the rudder closer than 3° to an endstop.

To calibrate the rudder feedback unit go to Rudder in the Setup > Calibrate menu. Follow the on-screen

instructions presented by the calibration wizard (See Explorer AP380 Operation Section).

3 Enter the user data listed in the User Data table

below (See Explorer AP380 Operation Section to

find what each data item means and how to

enter the data). Beside each item, write the

value of the user data that you enter.

Until the rudder feedback unit is calibrated (see

section 4-2), there is no rudder limit. The user

must ensure that rudder is not driven onto an

endstop when using the jog command (see

Explorer AP380 Operation Section).


Note

To exit the calibration at any time, press ESC.

If the boat is not turned as prompted or the compass is not working then calibration can not be

completed, the Explorer AP380 system displays an error. Press ESC, fix the problem and repeat the

calibration.

Local disturbances in magnetic field may affect the compass. Calibration must be preformed away

from large metal structures such as marinas, large ships etc.; this is the responsibility of the user.

Ensure that both sources are referencing the same north (true or magnetic). If your magnetic

compass has not been calibrated then you can use another source for heading. If using vessel’s

compass then ensure that the deviation tables are applied to check the AP380 compass.

To calibrate the Compass unit go to Compass in the Setup > Calibrate menu. Follow the on-screen


5-1 Calibrating the compass

5 Sea trialsPerform the sea trials:

After performing the dockside setup (see

section 4).

To check the operation of the Explorer AP380

system.

For the sea trials, sail in an open area where there

are no other craft or obstructions. The sea should

be calm, the wind speed as low as possible and

there should be no currents.

This aligns the Explorer AP380 system compass to display the correct heading.

The compass can be aligned either to a reference compass or to a GPS connected to the Explorer AP380

system. Ensure there is no cross-wind or current.

To align the Compass unit go to Align heading in the Setup > Calibrate menu. Follow the on-screen


5-2-2 Aligning the Rudder (Centre rudder)This sets the rudder setting to sail a straight course. Ensure there is no cross wind or current.

To align the rudder go to Centre rudder in the Setup > Calibrate menu. Follow the on-screen instructions

presented by the calibration wizard (See Explorer AP380 Operation Section).

5-2 Aligning the compass and the rudder

5-2-1 Aligning the compass (Align heading)

The compass or rudder can be aligned separately.


Appendix A - Specifications - MCU600Electrical:

Drive power supply: 10.5 to 16.5 V DC, 20 A

maximum

8-Way Terminal power supply: 10.5 to 16.5 V DC,

300 mA.

Other optional instruments: refer to the

instrument’s operation manual.

Interfaces:

NavBus: connection to other Northstar

instruments and Explorer AP380 display unit.

NMEA 0183 ports: NMEA 1: Input; NMEA 2: Can

be programmed to be an input or output

NMEA 0183 output messages: HDG, HDT, RSA;

NMEA 0183 input messages: APA, APB, BOD,

BWC, MWD, MWV, RMA, RMB, RMC, VHW, VTG, XTE

Standards compliance:

EMC compliance

USA (FCC): Part 15 Class B.

Europe (CE): IEC 60945:2002 Clause 9 & 10.

New Zealand and Australia (C Tick): IEC

60945:2002 Clause 9.

Environment:

Compass: IPx6 and IPx7 - completely waterproof.

Gyro: IPx6 and IPx7 - completely waterproof.

Rudder feedback unit: IPx6 and IPx7

- completely waterproof.

MCU600 Main unit: Not waterproof - requires a

cool, dry, clean environment.

MCU600 Main unit 8-way Terminal

connections:

Terminal Signal

1 Light duty power positive, 10.5 to

16.5 V DC

2 Light duty power supply common

3 NavBus +

4 NavBus —

5 NMEA common

6 NMEA in 1

7 NMEA in 2

8 Steering clutch relay drive output,

switched ground to turn relay on,

30 V DC, 300 mA maximum

MCU600 Main unit Drive

connections:

Terminal Signal

1 Heavy duty power positive, 10.5 to

16.5 V DC

2 Heavy duty power negative

3 Steering drive negative output

4 Steering drive positive output

MCU600 Internal Fuse:

2x fuses - both fuses are the same

Type: ATC - Automotive blade

Rating: 20A


Electrical:

Supply voltage: 10.5 to 30.5 V DC.

Supply current ( at 13.8 V):

Without backlighting: 160 mA.

With full backlighting: up to 410 mA.



Interfaces

NavBus: connection to MCU and other Northstar

instruments.

AP380 Display unit power/data cable wires:

Black connector - Power and MCU

Pin Wire color Signal

5 Red Power positive, 10.5 to 30.5 V DC

1 Black Power negative

6 Orange NavBus +

4 Blue NavBus -

7 Yellow Ignition wire

3 White Factory use (isolate, do not cut)

8 Green External alarm, switched to ground, 30 V DC and 250 mA max.

2 Brown Factory use (isolate, do not cut)

Green connector - NavBus expansion


5 Red Factory use (isolate, do not cut)


6 Orange NavBus +

4 Blue NavBus -

7 Yellow Factory use (isolate, do not cut)


8 Green Factory use (isolate, do not cut)

2 Brown +9V out

Standards compliance:

EMC compliance:

USA (FCC): Part 15 Class B


New Zealand and Australia (C Tick):

IEC 60945:2002 Clause 9.

Environment:

IPx6 and IPx7 - completely waterproof.

Appendix B - Specifications - AP380 Display


Appendix C - User data

User Data table (to record installation setup data)

Menu > Setup > SYSTEM menu

Language

Night mode

Key beep

Auto power off

SmartCraft

Menu > Setup > OPTIONS menu

Dodge angle

Tack mode

Tack angle

Gybe mode

Gybe angle

Tack delay

Turn rate

Menu > Setup > VESSEL menu

Vessel Type

Drive Type

Wind features

selected

Menu > Setup > ALARMS menu

Course error

XTE

Waypoint akn

Wind shift

(sail only)

Low battery

High current


Menu > Setup > UNITS menu

Distance

Compass

Magnetic

variation

Wind

Menu > Setup > COMMS menu

NMEA mode

NavBus group

Menu > Setup > PROFILES menu

Profile (user1)

Parameters:

Adaptive

Response

Ratio

Advanced:

Trim

C-rudder

GPS gain

Wind gain

Profile (user2)

Parameters:

Adaptive

Response

Ratio

Advanced:

Trim

C-rudder

GPS gain

Wind gain


Profile (user3)

Parameters:

Adaptive

Response

Ratio

Advanced:

Trim

C-rudder

GPS gain

Wind gain

Profile (user 4)

Parameters:

Adaptive

Response

Ratio

Advanced:

Trim

C-rudder

GPS gain

Wind gain

Profile (user5)

Parameters:

Adaptive

Response

Ratio

Advanced:

Trim

C-rudder

GPS gain

Wind gain


Explorer AP380Autopilot

Operation Section


Operation Contents

Using this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 371-1 AP380 Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

2 Quickstart ........................................................................................................................................... 38

2-1 Starting the AP380 system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .382-2 Using the AutoPilot to steer the boat automatically . . . . . . . . . . . . . . . . . . . . . . . . . . . . .382-3 Changing course during a voyage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .382-4 Changing steering mode during a voyage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .382-5 Regaining manual control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .382-6 Action in an emergency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .392-7 Manually steering the boat from the boats helm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .392-8 Manually steering the boat using power steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

3 AP380 operation .................................................................................................................................. 40

3-1 The keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .403-2 Turning the Explorer AP380 on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 3-3 Turning the Explorer AP380 off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 423-4 Backlight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 423-5 Engaging AP380 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 423-6 Disengaging AP380 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 423-7 Setting the steering mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 423-8 Changing course . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .433-9 Dodge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .443-10 Turn modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .463-11 Power steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .503-12 Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .503-13 Keylock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 513-14 Simulate mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

4 The displays ........................................................................................................................................ 52

4-1 Display > Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 524-2 Display > AutoPilot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 534-3 Display > Compass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .544-4 Display > Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 554-5 Display > Active alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

5 Data headers ....................................................................................................................................... 56


6 Menus .................................................................................................................................................. 57

6-1 Setup > System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .576-2 Setup > Profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .586-3 Setup > Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .586-4 Setup > Vessel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .586-5 Setup > Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 596-6 Setup > Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 596-7 Setup > Comms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .606-8 Setup > Calibrate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .606-9 Setup > Simulate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

7 Steering modes ................................................................................................................................... 61

7-1 Compass steering mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 617-2 GPS steering mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .637-3 Wind steering mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

8 Optimising steering performance ........................................................................................................ 69

8-1 Steering parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .698-2 Profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 708-3 Adjusting the steering parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

9 Troubleshooting .................................................................................................................................. 73

10 Specifications .................................................................................................................................... 74


The Explorer AP380 is a superior quality, high

performance AP380 display head. The Northstar

AP380 system has the flexibility to be used with

power or sail boats.

The Explorer AP380 has dedicated function keys

and a large 3.8” Color TFT display. This provides

the user with exceptionally easy to use controls.

The Explorer AP380 is part of the Northstar

family of instruments for boats, which includes

instruments for speed, depth, wind and repeaters.

These instruments can be connected together

to form an integrated data system for a boat. The

AP380 performance is enhanced if it is connected

to a boat speed instrument such as a Northstar

Explorer S310 or a GPS instrument.

NORTHSTAR EXPLORER AP380

Using this manualThis manual describes how to operate the

Explorer AP380. Refer to the Explorer AP380

System Installation Section at the front of this

manual for information on how to install and

setup the Explorer AP380 before use.

For maximum benefit, please read this manual

carefully before using the Explorer AP380.

Cleaning and maintenance

Clean the parts of the Explorer AP380 with a

damp cloth or mild detergent. Avoid abrasive

cleaners, petrol or other solvents. Do not paint

any part of the Explorer AP380 except for the

cables.

1-1 AP380 Modes

1-1-1 Operating modesThe AP380 has three operating modes (see

sections 3-5 and 3-6):

STANDBY:

The AP380 does not steer the

boat (except during jog steer). The

helmsman steers the boat with

the manual helm.

AUTO:

The AP380 steers the boat

automatically based on selected

Steering Mode and course. Do not

steer the boat manually.

HAND-STEER:

The AP380 does not steer the boat,

but displays steering information

for you to use to manually steer a

course. Steer manually using the

displayed steering data.

1-1-2 Steering modesThe AP380 has three steering modes (see section

3-7):

Compass - The boat sails at a set compass

heading.

COMPASS

GPS - The boat sails to a destination along a

preset route.

GPS

This mode requires a GPS instrument, such as

a Northstar Explorer 557 chart-plotter to be

connected via NMEA.

Wind - The boat sails at a set angle to the wind.

This mode requires a wind instrument, such as

a Northstar Explorer W310 to be connected via

NavBus or NMEA.

WIND

1 Introduction

STBY

HSTR


1-1-3 Power steering modesWhen the AP380 is in STBY (STANDBY) mode

the helmsman must steer the boat manually.

However The Explorer AP380 has two different

power steering control modes (see section 3-11).

Jog: Turns the rudder left or right while the key

is pressed.

Follow-up: Sets the target position of the

rudder. The rudder will turn until it is in the target

position.

2 Quickstart

2-1 Starting the AP380 system1. Turn the AP380 system on by pressing

2. If the AP380 is connected to speed, wind

or GPS instruments, turn these

on too.

3. If necessary, adjust the backlight so that

the display can be easily read (press

briefly and adjust using the Control Dial).

2-2 Using the AutoPilot to steer the boat automatically

1. Manually steer the boat to open waters

before engaging the AP380 to steer the

boat.

2. Select the desired steering mode by

pressing then use the Control Dial

to highlight Compass, GPS or Wind then

press .

3. If using GPS mode, start navigating to a

waypoint using the GPS instrument.

4. Engage the AP380 by pressing .

2-3 Changing course during a voyageIn Compass mode and Wind mode it is possible

to change course during a voyage:

Turn the Control Dial in the direction of the

intended course change, for example:

• To change course 10º to starboard, turn the

Control Dial 10 clicks clockwise.

• To change course 30º to port, turn the

Control Dial a whole turn counter-clockwise.

2-4 Changing steering mode during a voyageIt is possible to change the steering mode during

a voyage, for example:

• Change from GPS mode to Compass

mode at the end of a route, or,

• On a sailing boat, change from Wind

mode to Compass or GPS modes when

changing from sailing to motoring.

1. Press then use the Control Dial to

highlight the desired steering mode then

press .

2-5 Regaining manual control1. Press . The AP380 is now disengaged

and you have complete steering control.

can be pressed at any time.

2. Manually steer the boat using the boats

steering helm.

3. To re-engage the AP380, press .

Note regarding Jog and Follow-up mode:

The user is to be aware that while in Standby

(STBY) Mode, the AP380 can move the rudder

at anytime that the Dodge keys or Control Dial

is operated.

1-1-4 Turn modesThe Explorer AP380 can follow a preprogrammed

turn sequence. The AP380 has three different turn

modes (see section 3-10):

Tack/Gybe: Auto-tacks OR Auto-gybes the boat

after a delay period. The tack/gybe angle and

tack/gybe delay can be customised.

90º turn: The boat turns through 90º

180º turn: The boat turns through 180º

Note: Not all turn modes are available in all

operating modes.


2-6 Action in an emergencyTo regain control of the boat in an emergency

situation:

1. Press . The AP380 is now disengaged


2. Manually steer the boat.

Alternatively:

1. Press or to make an immediate

course change to port or starboard.

2. After a period of time, press to

resume original course, or press to

continue on the alternative course.

2-7 Manually steering the boat from the boats helm

To manually steer the boat:

1. Press . The AP380 is now disengaged


2-8 Manually steering the boat using power steering

To manually steer the boat using the AP380 to

move the rudder:

1. Ensure the AP380 is in STBY by pressing

.

2. Press and hold or to turn the

rudder to port or starboard. Pressing both

will centre the rudder

3. Release the button when the rudder is in

the desired position.

Alternatively:

1. Ensure the AP380 is in STBY by pressing

the key.

2. Turn the Control Dial until the on-screen

rudder indicator is in the desired position.

3. The AP380 will turn the rudder until it is in

the target position.


3 AP380 operation3-1 The keys

Button Function

1 ESC Step back a menu level or return to selected AP380 screen

2 ENT Selects highlighted items or brings up Parameters menu when in

AP380 display mode

3 MENU Shows context sensitive Options menu, press twice to show the Setup

menu.

4 DISP Opens display menu to change between AP380 screens

5 Control Dial Use to scroll through menus, increment or decrement selected values,

follow up rudder control and to make course changes.

6 Dodge Left Dodge to Port key (repeated presses increments values)

Initiates left tack/gybe, 90° turns and 180° turns

7 Dodge Right Dodge to Starboard key (repeated presses increments values)

Initiates right tack/gybe, 90° turns and 180° turns

8 Turns Opens turn menu to access tack/gybe, 90° turns and 180° turns

9 AUTO Places AP380 into auto mode

10 MODE Invokes steering mode menu

11 STBY Places AP380 into standby mode

12 Power Press and hold to turn instrument off. Single press shows backlight

control

1 2

3

45

6 7

8 9

10 11 12


3-1-1 AUTO key Press to engage AUTO mode. The AP380 is now

steering the boat based on the selected steering

mode. Press and hold for 2 seconds to engage

H-STEER mode.

3-1-2 STBY key Press to disengage AUTO mode and set STBY

mode. The AP380 is not steering the boat – the

helmsman must steer the boat using the manual

helm.

3-1-3 Dodge keys

Press or to trigger an immediate

dodge to port or starboard. Repeated presses of

the same key increments dodge angle.

STBY mode: Jogs the rudder left or right while

the key is pressed

AUTO mode: Activates a dodge. Causes the

vessel to deviate from the set course by a preset

angle.

3-1-4 Turn key Press to display the turn menu. The boat follows

a preprogrammed turn sequence. Select an

item from the menu then press or to

activate the turn in the corresponding direction.

Tip: Repeated pressing will cycle through

the menu selection.

3-1-5 MODE key Press to select steering mode.


the menu selection.

3-1-6 Control Dial When using menus and adjusting settings, use to

scroll through items and increment or decrement

values.

STBY mode: Moves the rudder to port or to

starboard half of a degree per click.

AUTO mode: Changes the set course by one

degree per click.

Note: In GPS mode, the set course can not

be adjusted as the course is controlled by the

navigation instrument.

3-1-7 ESC key When using menus and adjusting settings, press

to step back one level without saving changes.

When no menus or settings are displayed, press

to jump back to the most recently used AP380

display screen.

3-1-8 ENT key When using menus and adjusting settings, press

to choose selection or save setting.

Tip: When showing the Basic, AP380 or Compass

screen, pressing opens the Parameters

menu.

3-1-9 MENU key Press to show the Options menu (where

applicable).

Press twice to show the Setup menu.

3-1-10 DISP key Shows the Display menu.


the menu selection and will automatically select

the highlighted entry after 1 second.

3-2 Turning the Explorer AP380 on• Press .

• If there are no other AP380 display heads on

the system, The Explorer AP380 will turn on

and enter STBY (Standby) mode.

Note: If the AP380 was switched off while still

in AUTO mode, a warning message will be

displayed to alert the user that there may have

been a power interruption.

Note: When the AP380 is powered on, the

Control Dial and Dodge keys are active and

can operate the rudder at any time (see Power

Steering modes 1-1-3)


3-3 Turning the Explorer AP380 offWhen in STBY mode:

• Press and hold . A pop-up box will appear

and start a 3 second count-down. The unit

will turn off when the counter reaches 0.

• Releasing during this time will resume

normal operation.

• Any settings you have made are retained by

the unit.

When in AUTO mode:

• Press and hold . A warning pop-up box

will remind you to enter STBY mode before

the unit can be turned off. Press to close

the pop-up.

3-4 Backlight

Briefly press . The Backlight pop-up will

appear.

Repeating this action will toggle from day to

night mode.

Use the Control Dial to increase or decrease the

display and keypad backlighting.

• The Explorer AP380 has a choice of white

background ‘Day’ and black background

‘Night’ backlighting modes. Either mode can

be selected using the Control Dial.

• The Backlight pop-up may also be selected:

Menu > Setup > System > Backlight menu.

• Backlighting on all other Northstar

instruments that are connected on the same

NavBus backlighting channel will also change.

3-5 Engaging AP380Select AUTO mode by pressing . The AP380

is now steering the boat based on the selected

steering mode.

3-6 Disengaging AP380Select STBY mode by pressing . The AP380

is not steering the boat – the helmsman must

steer the boat using the manual helm.

3-7 Setting the steering modeFor a power boat:

For a boat without GPS, or for a boat with GPS

but you do not want to navigate to a waypoint,

choose Compass mode. The AP380 steers the

boat at a set compass heading.

• Select Compass mode by pressing ,

choose Compass and press .

To use the AP380 with a GPS to navigate to a

waypoint or along a route, choose GPS mode.

The AP380 steers the boat using navigation data

from the GPS.

• Select GPS mode by pressing , choose

GPS and press .

For a sailing boat:

To steer to a set compass heading, choose

Compass mode.

• Select Compass mode by pressing ,

choose Compass and press .

To navigate to a waypoint or along a route,

choose GPS mode.

• Select GPS mode by pressing , choose

GPS and press .

To sail, tack and gybe at a set angle to the wind,

choose Wind mode.

• Select Wind mode by pressing , choose

Wind and press .


3-8 Changing course

3-8-1 Changing course in compass modeTo change course in 1 steps, turn the Control Dial.

• turn the Control Dial counter-clockwise to change course to port

• turn the Control Dial clockwise to change course to starboard

Example

3-8-2 Changing course in GPS modeThe course maintained by the AP380 is controlled by the GPS device that is navigating to a waypoint. To

change course in GPS mode, select a different waypoint on the GPS device.

Tip: It is possible to change steering modes

while in AUTO mode. For example it is helpful

to use Compass mode to control the boat when

setting up a GPS route, then change directly to

GPS mode.

Note for sailing boats:

• The AP380 is not recommended for use in

light, changeable or gusty winds.

• Take care when running downwind to avoid

an accidental gybe.

• Wind mode requires the wind instrument to

be accurately calibrated.

Note: To select GPS mode, the AP380 must be

receiving data from a compatible GPS instrument,

otherwise the GPS selection will not be available.

To engage the AP380 in GPS mode, the GPS must

be navigating to a waypoint or along a route;

otherwise the Explorer AP380 will display an error

message. If the boat is too far from the plotted

course, the Explorer AP380 will display a warning

message.

To select Wind mode, the AP380 must be

receiving data from a compatible wind

instrument, otherwise the Wind selection will not

be available.

Heading = 45°

CTS = 45°

CTS changes to 44°

Boat comes to 44° heading CTS changes to 46°

Boat comes to 46° heading

Heading = 45°

CTS = 45°


3-9 DodgeA dodge is a sharp change of course, usually to avoid an obstacle.

• press to dodge to port by the dodge angle

• press to dodge to starboard by the dodge angle.

The boat will change course by a preset dodge angle. To dodge further, press or more times.

To view or change the dodge angle, go to Dodge angle in the Options menu (see section 6-3).

Heading = 45°

CTS = 45°

CTS changes by the dodge angle.

Boat comes to new heading.

Press

to continue

on the new

heading

Press

to resume

the earlier

heading

or

3-9-1 Dodging in compass mode

3-8-3 Changing set wind angle in wind modeTo change set wind angle (SWA) in 1˚ steps, turn the Control Dial.

• turn the Control Dial counter-clockwise to change course to port

• turn the Control Dial clockwise to change course to starboard

Example

Wind

SWA = 40° SWA changes to 39°. Boat comes to new wind

angle of 39°SWA = 40°

SWA changes to 41°. Boat comes to new

wind angle of 41°

Wind


CTS changes by the

dodge angle.

Boat comes to new

heading.

Press to resume

the earlier heading WARNING: The

Explorer AP380 will

steer back to the

GPS plotted course.

Make sure there

are no obstacles or

dangerous waters in

the way.

3-9-2 Dodging in GPS mode

3-9-3 Dodging in wind mode

Press to resume

the earlier wind angle

SWA changes by the

dodge angle. Boat comes

to new wind angle.

The Explorer AP380

beeps.

Wind

SWA = 40°

The Explorer AP380 will steer back to the GPS

plotted course. Make sure there are no obstacles

or dangerous waters in the way.


90º turn: The boat

turns through 90ºTack/Gybe:

Auto-tacks the boat after

a delay period. The tack

angle and tack delay can

be customised. Gybes

can be disabled.

180º turn: The boat

turns through 180º

3-10 Turn modesThe Explorer AP380 can follow a preprogrammed turn sequence. The AP380 has three different turn

modes:

Availability: Compass GPS Wind

Tack/Gybe yes no yes

90º yes no no

180º yes no no

3-10-1 Auto tacking in compass modeAuto tacking is intended to tack a sailing boat. The course to steer changes by the tack angle.

• press , select Tack/Gybe then press to tack to port by the tack angle

• press , select Tack/Gybe then press to tack to starboard by the tack angle.

Press to initiate a tack to

port or starboard.

Press or

to select tack

direction

The boat sails straight while the

Explorer AP380 counts down

the tack delay.

The unit gives a long beep at

60 and 30 seconds to go, a

short beep every second from

10 seconds to 1 second to go

and a long beep that finishes

when the countdown ends.

Course after tacking

Course prior to tacking

delay count

The tack is fin-

ished when the

boat reaches the

new heading

A

B


3-10-2 Turns in compass modeTo change course by 90˚

• press ,select 90˚ turn then press to turn to port by 90˚

• press , select 90˚ turn then press to turn to starboard by 90˚

To change course by 180˚

• press , select 180˚ turn then press to turn to port by 180˚

• press , select 180˚ turn then press to turn to starboard by 180˚

Note: To tack to a fixed wind angle, use the

AP380 in Wind mode (see section 7-3). To view

or change the tack angle or the tack delay, go to

tack mode, tack angle or tack delay in the Options

menu (see section 6-3). Gybe angle is not used in

Compass mode.

Press to initiate a 90 or

180 turn to port or starboard.Press or to select turn

direction

When auto-tacking (in Compass Mode), the

course to steer changes by the tack angle.

The AP380 does not use data from any wind

instrument. It is possible for the boat to gybe

or to end in irons (head to wind).


3-10-3 Auto tacking or gybing in wind modeIf the set wind angle (SWA) is 90° or less, the boat tacks, if the SWA is more than 90° the boat gybes. After

the tack or gybe, the SWA is the same as the SWA before the tack or gybe, but from the

other side.

• Press , select Tack/Gybe then press to tack or gybe to port

• Press , select Tack/Gybe turn then press to tack or gybe to starboard

Example:

SWA is 40°, so the boat will tack, not gybe. If the tack angle is not set to Auto, the boat changes direction

twice:

- first by the tack angle

- second so that SWA is the same as before the tack or gybe, but on the other side:

After the boat has reached the tack angle, the boat turns again so

that the SWA (set wind angle) is the same as the SWA before the

tack, but from the other side

Wind

SWA = 40°

Press , select

Tack/Gybe then press

to initiate a tack

to port.

The tack is finished when the boat reaches the new wind angle

To cancel the tack at any

time, press

At the end of the tack delay, the course changes by the

tack angle (in this example, the tack angle is not set to

Auto). The boat turns.

The boat sails straight while the Explorer AP380 counts down

the tack delay.

The unit gives a long beep at 60 and 30 seconds to go, a short

beep every second from 10 seconds to 1 second to go and a

long beep that finishes when the countdown ends.

3 seconds to go until the tack starts


There are four possibilities for auto tacking or gybing:

Tack (SWA is 90° or less) Gybe (SWA is more than 90°)

Note: To view or change the tack mode, tack angle, gybe mode, gybe angle or tack delay, go to the

Options menu (see section 6-3).

Press , select

Tack/Gybe then

press to tack

to port.

Press select

Tack/Gybe then press

to tack to starboard.

Press select

Tack/Gybe then

press to gybe

to port.

Example:

SWA is 120°, so the boat will gybe. The tack angle

is not set to Auto:

Example:

SWA is 40°. The tack angle is set to Auto so the

boat changes direction once:

The Explorer AP380

counts down the tack

delay.

The Explorer AP380

counts down the tack

delay.

Press , select Tack /Gybe

then press to initiate a tack to

port

Press , select Tack/Gybe.

Then press to initiate a

gybe to starboard

To cancel the gybe

at any time, press

End of tack, boat is

at new SWA

End of tack, boat is at new SWA

The course

changes by the

gybe angle

Wind

The course changes again

so that the SWA is the

same as the SWA before

the tack

The course

changes so that

the SWA is the

same as the SWA

before the tack

To cancel the gybe

at any time, press

Wind

Press select

Tack/Gybe then

press to gybe to

starboard.

If SWA is more than 90° and the gybe angle is set

to AUTO then the boat will change direction once

during a gybe, so that the SWA is the same as the

SWA before the gybe.

Wind


3-11 Power steeringWhen the AP380 is in STBY mode the helmsman

must steer the boat manually. However the AP380

has power steering control modes available while

in STBY mode:

To Jog Steer to port:

• hold down to turn the rudder to port

To Jog Steer to starboard:

• hold down to turn the rudder to

starboard

Follow-up steering:

• turn the Control Dial to set the desired

position of the rudder (this function is

disabled until the rudder feedback unit and

the compass have been calibrated

[see section 6-8])

• a popup window will appear at the bottom

of the screen indicating the desired position

and the current position of the rudder.

3-12 Alarms There are several alarms that monitor the condition of the AP380 system, these alarms can not be adjusted. There are also alarms that can be enabled to automatically detect certain conditions, such as low battery.

Alarms that are enabled are shown as black icons in the alarm status box on the Explorer AP380 header.

When an alarm is triggered:

• the beeper sounds

• the external alarm sounds or lamp illuminates (if connected)

• the bezel backlight on the Explorer AP380 flashes

• the alarm window is displayed

• and the alarm status icon is shown in the color corresponding to the severity of the alarm.

Press or to acknowledge and reset the alarm. This action does not disable the alarm.

• Alarms can be set: Menu > Setup > Alarms menu (see section 6-5).

Severity Alarm tone Color Description

Info Single beep Blue Information message, does not affect AP380 operation.

Warning Slow beeping Black A low priority event has occurred.

Caution Moderate beeping Yellow An event has occurred that may require corrective action.

Severe Rapid beeping Orange An important event has occurred requiring immediate

attention.

Critical Rapid beeping, low tone Red A critical problem is preventing the AP380 from controlling

the boat, manual steering is required immediately.

• the rudder will move to the desired position.

• To stop the rudder turning, press ,

or .

To centre the rudder:

• press and release + together to

turn the rudder to amidships (this function

is disabled until the rudder feedback unit

and the compass have been calibrated [see

section 6-8])

• To stop the rudder turning to amidships press

, or

Until the rudder feedback unit is calibrated,

there is no rudder limit and the user must

ensure that the rudder is not driven onto an

end stop when using jog steering (damage

may occur).


3-12-1 The alarm windowThe alarm window shows a list of the latest active

alarms. The most severe alarms appear at the top

of the list.

Turn the Control Dial to stop the Explorer AP380

from beeping.

Select ‘Details’ to acknowledge the displayed

alarms and jump directly to the Alarm history

screen.

Select ‘OK’ to acknowledge the displayed alarms.

3-12-2 Active alarmsThe Active alarms screen shows a list of the

currently active alarms.

To show the Active alarms screen:

• Select ‘Active alarms’ in the Display menu or,

• Go to Menu > Setup > Alarms > Active alarms.

Turn the Control Dial to select an alarm in the list

and press to see the Alarm details.

3-12-3 Alarm historyThe Explorer AP380 keeps a record of alarms.

The Alarm history screen shows a list of up to 18

recorded alarm events.

To show the Alarm history screen:

• Select ‘Details’ from the alarm window or,

• Go to Menu > Setup > Alarms > Alarm History.

Turn the Control Dial to select an alarm in the list

and press to see the Alarm details.

3-12-4 Alarm detailsThe alarm details window shows extra detail on

an individual alarm.

3-13 KeylockWhen keylock is activated, the Explorer AP380 will

ignore most key presses.

• To turn keylock on:

Press and hold the key for 2 seconds. A ‘Keys

locked’ message will appear and a small lock icon

will appear on the lower right-hand display.

• To turn keylock off:

Press and hold the key for 2 seconds. A ‘Keys

unlocked’ message will appear and the keys are

re-enabled.

3-14 Simulate modeIf the word ‘Simulate’ flashes on the display, then

the unit is in simulate mode.

• Simulate mode allows you to become familiar

with the unit off the water.

• Simulate mode can be turned on or off: Menu

> Setup > Simulate menu.

Do not use simulate mode while at sea.


Options menu:

Data setup - Selects what data is displayed in the info

panel.

Auto Rd/CE/XTE – Automatically switches the displayed

data between rudder, course error and cross track error

depending on the operating mode.

Course error – Shows a course error bar in the info

panel.

Rudder angle – Shows a rudder angle gauge in the

info panel.

XTE – Shows a cross track error bar in the info panel.

4 The displays

Press key to show the Display menu, select a display option using

the Control Dial and press .

Tip: Repeated pressing will cycle the menu selection and will automatically

select after 1 second.

4-1 Display > Basic Displays a standard AP380 display with just the essential AP380 data.

Display area Function

1

Drive

indicators

Left and right boxes light up to indicate when the AP380 is driving the rudder

2 Heading Large digits show the heading of the vessel

3 Info panel This panel can be configured to display different data items. Default:

Automatically switches between Rudder angle, Course error and Cross track

error.

4 Set course STBY mode: shows ‘---’ since the set course is not valid in standby mode

AUTO mode: digits show the current course to steer (CTS), except for

WIND mode: digits show the current set wind angle (SWA)

The colored ring is yellow in STBY mode, green in AUTO mode, magenta in

H-STEER mode and red when there is a critical alarm

5 Steering

mode panel

Shows the steering mode (COMPASS, GPS, WIND)

6 Operating

mode

panel

Shows the operating mode (Standby, Auto, H-Steer). Panel changes to blue

when in AUTO mode.

Basic displays

1

2

34

5

6


4-2 Display > AutoPilot Displays an advanced AP380 display with essential AP380 data.


1 Data Header Customizable data cells. Each display page has a separate header

configuration. Default: Voltage, Current, Alarm Status (see section 5).

2 Heading Large digits show the heading of the vessel

3 Drive

indicators

Left and right boxes ‘fill up’ to indicate when the AP380 is driving the rudder

and how much power is being used by the drive system

4 Numerical data

panels

Customizable data cells. Default: Course to steer, Course error.

5 Bar data

panels

Customizable indicator bar. Default: Automatically switches between Rudder

angle, Course error and Cross track error.

6 Mode panel Left hand side: shows the steering mode (COMPASS, GPS, WIND)

Right hand side: shows the operating mode (Standby, Auto, H-Steer) inside a

colored tab.

Panel changes to blue when in AUTO mode. The colored tab is yellow in

STBY mode, green in AUTO mode, magenta in H-STEER mode and red

when there is a critical alarm.

Options menu:

Header Menu for configuring the data header in this

display (see section 5).

Data setup Enters the data set-up mode. Use the Control

Dial to highlight a data cell, press to display a list of data

types that can be displayed in that cell.

1

2

3

4

56

AutoPilot displays


4-3 Display > Compass Displays a standard AP380 display with just the essential AP380 data.


1 Data Header Customizable data cells. Each display page has a separate header

configuration. Default: Course to steer, Heading, Alarm Status

(see section 5).

2 Drive

indicators

Left and right boxes ‘fill up’ to indicate when the AP380 is driving the rudder

and how much power is being used by the drive system

3 Compass card Compass card rotates to show the heading of the vessel under the lubber

mark.

4 Course arrow STBY mode: points to the current heading

AUTO mode: points to the set course, except for:

GPS mode: points to the bearing to waypoint

5 Deviation bar Moves laterally to show course information.

Note: This bar can be configured to display different items.

Default: Automatically switches between Rudder angle, Course error and Cross

track error.

6 Deviation scale Indicates what data the deviation bar is currently showing and the magnitude

7 Mode panel Left hand side: shows the steering mode (COMPASS, GPS, WIND)

Right hand side: shows the operating mode (Standby, Auto, H-Steer) inside a

colored tab.

Panel changes to blue when in AUTO mode. The colored tab is yellow in STBY

mode, green in AUTO mode, magenta in H-STEER mode and red when there

is a critical alarm.

Options menu:

Deviation bar Selects what data is displayed by the

deviation bar.

Auto Rd/CE/XTE – Automatically switches the deviation bar

between rudder, course error and cross track error depending

on the operating mode.

Course error – Shows course error using the

deviation bar.

Rudder angle – Shows rudder angle using the

deviation bar.

XTE – Shows a cross track error bar using the deviation bar.

Header – Menu for configuring the data header in this display

(see section 5).

1

23 4

5 6

7Compass displays


4-4 Display > Data The data display shows one large data cell, two smaller data cells and a data history graph. Each is

these items can be configured to display a range of data types. The graph is useful for analysing the

performance of the AP380.


1 Big data cell Customizable data cell. Default: Rudder angle.

2 Small data cells Customizable data cells. Default: Voltage, AP380 Status.

3 History graph This graph plots data over a period of time. There are two graph series that can

be configured, red and green. Default: Rudder angle, Course error.

4 Time base The time base of the graph can be set from 2 minutes to 1 hour. This is the

amount of time it takes for new data to scroll from the right hand side to

the left hand side.

Options menu:

Data setup Enters the data set-up mode. Use the Control Dial to highlight a data cell,

press to display a list of data types that can be displayed in that cell.

Time base - Selects the time base of the history graph. Select 2 min, 4 min, 10 min,

20 min or 1 hour.

1

2

3

4

4-5 Display > Active alarmsShows a list of the currently active alarms (see section 3-12-2).

Data display


5 Data headersData headers are available on the AP380 and Compass screens. A data header is a customizable feature

that can be used to display up to 6 different data items, such as boat speed or alarm status. The AP380

and Compass screens have separate settings for the data header.

Header menu:

Data Turns the data header completely on or off.

Data setup

Enters the data set-up mode. The Data header expands to display all 6 possible data cells. Some data cells

may be blank. Use the Control Dial to highlight a data cell, press to display a list of data types that

can be displayed in that cell.

Size

Selects the size of the data header items. Select Small, Medium or Large.


6 MenusMany of the Explorer AP380 features and functions are operated through menus.

• To scroll through menu items, scroll through items in a list or change data use the Control Dial. Clockwise scrolls across/down or increments data.

• To select a menu item press .

• To go back to the previous menu press .

• To accept changes press .

• To discard changes press .

Note: Some menu items in the Explorer AP380 menus utilize checkboxes.

• If the box is ‘checked’ (contains a check or tick), then that function is selected (enabled) or ON.

6-1 Setup > System

Language

Select the language for the display. The options

are: English, Italian, French, German, Spanish,

Dutch, Swedish, Portuguese, Finnish and Greek.

Tip: In case you can’t read the current

language, the language setting is the first

item in the system menu.

Backlight

The backlight pop-up is displayed (see also

section 3-4).

The bar setting represents the current level of

backlighting.

Night Mode –Allows low contrast Night mode.

Auto – allows night mode to be selected in

backlight pop-up

On – night mode is active all the time

Off – night mode is not available

Key beep

Enables or disables an audible beep when a

key is pressed or Control Dial is rotated.

Auto power off

Select to have the AP380 power off

automatically every time the boat’s ignition

is switched off. This applies only if the display

unit is wired for Auto Power (see installation

manual).

About

Displays information about the unit.

Factory Reset Resets all settings to the factory

default settings. A warning box asks: Are you

sure? Select Yes and press to confirm, or

No or to cancel.

Main control unit – Resets the MCU’s

settings

Head unit – Resets just this head unit’s

settings

Both – Resets the MCU’s settings and this

unit’s settings

SmartCraft™ Select to enable SmartCraft

functions. SmartCraft is only available with

certain Mercury engines, and requires a

SmartCraft Gateway. For more information

refer to the SmartCraft manual included with

the SmartCraft gateway.

• If the box is ‘un-checked’ (does not contain a check or tick), then that function de-selected (disabled) or OFF.

• To select or de-select a checkbox, highlight the menu item using the Control Dial and press . The change will happen immediately.

The main menu for configuring the Explorer

AP380 is the Setup menu. Press until the Setup menu is displayed (normally twice).

The Setup menu and options are summarized

in this chapter. The factory default settings are

shown where applicable. Each Setup menu

option is explained in the following sections.


6-2 Setup > Profiles Profiles are used to store a range of AP380

settings for different sea, environmental and

vessel conditions. Up to 5 user profiles may be

configured (see section 8-2).

Profile

Select the current profile to use.

Edit name

Use to edit the name of the currently selected

profile (see section 8-2).

Parameters

Opens the Parameters menu (see section 8-1).

6-3 Setup > Options Options can be selected to set AP380 operating

limits:

Dodge angle

Sets size of the dodge angle steps in degrees.

Minimum = 5 ;̊ maximum = 30˚

Tack mode

Auto – vessel tacks to the same set wind

angle but on the opposing tack.

Set angle – vessel tacks through an angle

set in Tack angle, then steers to the same set

wind angle but on the opposing tack.

Tack angle

Set tack angle if Set angle is selected in Tack

mode.


Gybe mode

Off – gybing is disabled.

Auto – vessel gybes to the same set wind


Set angle – vessel gybes through an angle set in

Gybe angle, then steers to the same set wind


Gybe angle

Set gybe angle if Set angle is selected in Gybe

mode


Tack delay

Set delay that the AP380 will use from the

time a Tack is requested to the time a Tack is

carried out by the AP380

Minimum = 0; maximum = 120 (seconds)

Turn Rate

Set the maximum turn rate you want the

AutoPilot to use.

Minimum = 3; maximum = 20 ( /̊second)

6-4 Setup > Vessel Vessel type can be selected to alter the

performance characteristics of the AP380

depending on the vessel hull type:

Vessel type

Select Planing, Displacement or Sailing.

Changing the vessel type causes the steering

parameters to be reset to default values in the

current profile.

Drive type

Configures the AP380 to drive the type of

steering system. See installation section for

details.

Wind features

Controls whether wind features such as

Tack/Gybe are accessible.


6-5 Setup > Alarms

Some of the AP380 alarms are user configurable.

Alarm trigger settings can be defined to suit the

boat and individual preferences as follows:

Course error

The alarm will sound if the vessel strays from

its intended course by more than the set

error. Set OFF or a value in degrees.


XTE

Cross Track Error – The alarm will sound if

the vessel strays from it’s intended track by

more than the set error. Set OFF or a value in

nautical miles.

Minimum = 0.01; maximum = 2.0 (nautical

miles)

Waypoint akn

The alarm will sound and ask the user for

confirmation, when in GPS mode, when

arriving at a waypoint before steering to the

next waypoint.

Set ON or OFF.

Wind shift

The alarm will sound if, when in Wind mode,

the wind shifts by more than the set angle

since engaging AUTO.

Set OFF or a value in degrees.


Low battery

The alarm will sound if the vessel battery

voltage is below the setting.

Set OFF or a value in Volts.

Minimum = 7; maximum = 14 (Volts)

High current

The alarm will sound if the current drawn

from the battery by the rudder drive system

exceeds the setting.

Set a value in Amps.

Minimum = 5; maximum = 20 (Amps)

Active alarms

Displays a list of currently active alarms (see

section 3-12-2).

Alarm history

The AP380 keeps a record of alarms. Displays

the alarm history list (see section 3-12-3).

Clear alarm history

Allows the alarm history to be cleared.

A warning box asks: Are you sure?

Select Yes and press to confirm, or No or

to cancel.

6-6 Setup > Units

Select the units you prefer the AP380 to display:

Distance

All distance readings are displayed in the

selected units.

nm (nautical miles), mi (miles), km

(kilometers)

Compass

All compass readings are displayed in the

selected units.

°T (degrees True), °M (degrees Magnetic)

Magnetic variation

Set the local magnetic variation in degrees.

Minimum= -°90(W); maximum= +°90(E)

(degrees)

Wind

All wind readings are displayed in the

selected units.

App (Apparent), True (True)


6-7 Setup > Comms

Use this feature when the AP380 is connected to

other Northstar instruments through NavBus or

any compatible NMEA instrument.

NMEA mode

Select NMEA port mode.

Input – NMEA port can receive NMEA data

Slow – NMEA port outputs heading and

rudder angle once per second

Fast – NMEA port outputs heading data ten

times per second

NavBus group

Use this when a group of Northstar

instruments are connected together using

NavBus, to specify a group of instruments for

backlighting, if required. Then, if the backlight

setting on one instrument in the group is

adjusted, the other instruments change

automatically. Otherwise, select 0.

6-8 Setup > Calibrate

The calibrate wizard screens are used during the

initial AP380 installation stage or if any previously

installed AP380 transducers have changed or

moved.

It is vital to the performance of the AP380 that the

transducers are installed in the best location and

carefully calibrated.

Compass

Use this calibration wizard to calibrate the

compass.

Follow the on-screen instructions:

• Slowly turn boat 2.5 times, observing the

turn rate indicator

• Align heading – press and dial in the

current heading

• Accept calibration

• Calibration complete

Rudder

Use this calibration wizard to calibrate the

rudder.

Follow the on-screen instructions:

• Centre the rudder

• Turn rudder to Maximum Port

• Turn rudder to Maximum Starboard

• Set angle – press and dial in the

current rudder angle

• Centre the rudder

• Stand clear of the rudder and linkages so

the AP380 can test the limits.

• Testing limits – press at any time to

abort the calibration

• Accept calibration

• Calibration complete

Align heading

Use to align the compass to the actual boat

heading. If a compass calibration has recently

been performed, it is not necessary to align the

heading again.

Use the manual helm to sail a straight course

and ensure the boat heading does not change

during this procedure. Use an accurate reference

compass or external GPS to find the actual boat

heading. If you are using an external GPS, sail

as fast as convenient to ensure the heading is

accurate.

Enter the actual course heading.

Minimum = 0°; maximum = 359° (degrees)

Centre Rudder

Use to set the rudder centre position. If a rudder

calibration has recently been performed, it is

not necessary to set the rudder centre position

again. Ensure the rudder is in the centre position

and that there is no cross-wind or tidal current

affecting the rudder.

Select OK and press when the rudder is

centreed.

6-9 Setup > SimulateTurn simulate mode on and off

(see section 3-14).


Actual boat heading is 45°

CTS (course to steer, the intended

AP380 course) 55°

Course error = 10°

Important:

• The AP380 cannot control the boat better than a helmsman. The AP380 is not intended for use in

extreme weather, in adverse conditions or near other boats, dangerous waters or land.

In these conditions, disengage the AP380 and steer manually.

• Never leave the helm unattended, keep a watch at all times and be ready to

resume steering the boat manually.

• Do not try to turn the rudder by hand when the AP380 is engaged.

• Local variations in magnetic field can affect the accuracy of the compass heading.

Such variations are the responsibility of the user.

7 Steering modes

7-1 Compass steering modeThe AP380 has three ways of steering the boat, compass, GPS and wind. To select an appropriate mode,

see section 3-7. In Compass mode, the AP380 steers the boat to a set course, called CTS (Course to steer).

7-1-1 Compass steering data


HANDSTEER:

Steer the boat manually. Display CTS in

the info data or course error in the bar

data and use these to steer by.

To engage AUTO,

press

Heading = 45°

For example:

To engage HANDSTEER,

hold

AUTO:

The AP380 steers the boat automatically.

The Explorer AP380 sets CTS (course to steer) to the

current heading, in this example 45°, and starts steering

on this course.

To disengage the AP380, press

The AP380 returns to STBY mode. Steer the boat

manually.

Heading = 45°

CTS = 45°

Manually steer the boat to

open waters. Sail straight on the

intended course.

7-1-2 Engaging and disengaging the AP380 in compass mode


Destination

DTG (distance)

TTG (time)

BRG (bearing)

SOG (speed)

Course error (angle)

CTS (bearing)

Plotted course

BoatXTE (distance)

Start

COG (bearing)

7-2 GPS steering modeThe AP380 has three ways of steering the boat, compass, GPS and wind. To select an appropriate mode,

see section 3-7. In GPS mode, the AP380 uses data from a GPS to steer the boat along a route or to a

waypoint.

7-2-1 GPS navigation dataNavigating to a waypoint:

The boat is sailing from the start to the destination and has moved off the GPS plotted course from the

start to the destination:

BRG Bearing to destination

The bearing to the destination from the boat.

COG Course over ground

Direction in which the boat is moving over the ground.

CE Course error

The difference between CTS and the boat heading.

CTS Course to steer

Optimum course to steer to return to the plotted course.

DTG Distance to go

Distance from the boat to the destination.

SOG Speed over ground

The current boat speed over the ground. This is not necessarily the same as the boat speed

through the water nor the speed at which the boat is approaching the destination.

TTG Time to go

The estimated time to reach the destination.

XTE Cross track error

The distance from the boat to the nearest point of the plotted course. XTE may have a letter:

R means steer to the right to return to the plotted course, L means steer to the left.


HANDSTEER:

Steer the boat manually. Display CTS in

the info data or course error in the bar

data and use these to steer by.

To engage AUTO,

press

To engage HAND STEER,

hold

AUTO:



The AP380 returns to STBY (standby). Steer the

boat manually.

BRG (direction

of GPS course)


open waters. Start the GPS

navigating to a waypoint,

either a waypoint on a route

or a single waypoint.

XTE (distance to GPS

course)

GPS plotted course to

a waypoint

GPS

plotted

course

When the Explorer AP380 is engaged, if the XTE is more than 0.05 nm or the

boat heading is not within 30° of BRG then the Explorer AP380 displays

a warning:

Press to remain in STBY mode or press to have the Explorer

AP380 steer the boat to the course.

When the Explorer AP380 is engaged, it uses data from the GPS

to steer the boat along the plotted course to the waypoint.

7-2-2 Engaging and disengaging the AP380 in GPS mode


7-2-3 Arriving at waypointsIf the GPS is following a route and the boat reaches an intermediate waypoint:

If the Waypoint Acknowledge alarm (see section 6-5) is off, the AP380 automatically starts steering to the

next waypoint in the route. If the Waypoint Acknowledge alarm is on, the AP380 shows the following

alarm:

The AP380 continues steering on the old course. Select “OK” to start steering to the next waypoint.

When the boat reaches the final waypoint, the AP380 shows the following alarm:

The AP380 continues steering on the old course. Select “OK” change to Compass mode and continue

sailing at the current heading. Press to return to STBY mode.

Note: To return to the last waypoint if the boat has passed the waypoint, restart the GPS navigating to

the waypoint.

7-2-4 GPS gainIn GPS mode, The GPS gain determines how much correction is applied to remove cross track error. A

high setting will cause the AP380 to steer quickly back towards the track. A low setting will cause the

AP380 to steer very gently back towards the track.


Boat heading

Course error

CTS (intended AP380 course, to achieve the SWA

[set wind angle])

SWA (set wind angle), 41°

Wind angle

can be APP (apparent) or TRUEWind

APP Apparent wind angle The apparent wind angle at the boat. P in front of the angle means the

wind is from port, S means that the wind is from starboard.

CTS Course to steer The course to steer to maintain the SWA (set wind angle).

Course error The difference between APP (wind angle) and SWA (set wind angle).

SWA Set wind angle The desired wind angle.

TRUE True wind angle The true wind angle at the boat. P in front of the angle means the wind

is from port, S means that the wind is from starboard.

7-3 Wind steering modeThe AP380 has three ways of steering the boat, compass, GPS and wind. To select an appropriate mode,

see section 3-7. In wind mode, the AP380 steers the boat to a set angle to the wind, called SWA (set wind

angle).

7-3-1 Wind steering data


7-3-2 True and apparent wind speed and directionApparent wind speed and direction are the values measured on the boat. True wind speed and direction

are the values after allowing for boat speed through the air.

If the boat is moving, then the apparent wind speed is different to the true wind speed and the apparent

wind direction is different to the true wind direction, as shown below.

Boat moving upwind

Apparent wind speed is greater than true wind speed

and apparent wind direction is closer to dead ahead than true wind direction

Boat is at

rest

True wind speed is the same as apparent wind speed and

true wind direction is the same as apparent wind direction

True

wind

speed

20 kts

Boat moving downwind

Apparent wind speed is less than true wind speed and apparent wind direction is closer to

dead ahead than true wind direction

True

wind

speed

20 kts

True

wind

speed

20 kts

Boat

speed

10 kts

True

wind

speed

20 kts

Boat

speed

10 kts

Boat

speed

10 kts

Apparent wind

speed 15 kts

Boat

speed

10 kts

Apparent wind

speed 15 kts

True wind

direction

45º

True wind

direction

135º

Apparent

wind

direction

107º

Apparent

wind

direction

30º

Apparent

wind speed

28 kts

Apparent

wind speed

28 kts

Boat at rest


7-3-3 Engaging the AP380 in wind mode

HANDSTEER:

Steer the boat manually. Display CTS in the info data or course error in the bar data and use these to steer by.

To engage AUTO,

press

To engage HAND STEER,

hold

AUTO:



The AP380 returns to STBY (standby). Steer the

boat manually.

GPS

plotted

course

The Explorer AP380 sets CTS (course to steer) to the current heading, in this

example 45°, sets SWA (set wind angle) to the current wind angle and starts

steering at this wind angle.

SWA = 45°

Wind

APP = P40°

For example:

SWA = 45°

Wind

APP = P40°

APP = S40°

SWA = 40°

Wind

APP = S120°

SWA = 120°

Wind

The Explorer AP380 can also be engaged on the

starboard tack, for example: or when running, for example:


open waters. Sail straight at

the intended wind angle.

The Explorer AP380 info

data can display TRUE

(true wind angle) or APP

(apparent wind angle) (see

section 6-6)


7-3-4 Wind gainIn GPS mode, The wind gain determines how much correction is applied to reduce any difference

between the set wind angle and the actual wind angle. A high setting will cause the AP380 to be

strongly affected by changes in the wind. A low setting will cause the AP380 to be very mildly

affected by changes in the wind.

8-1 Steering parameters

The AP380 has seven steering parameters

which can be adjusted to optimize steering

performance. Select the Advanced checkbox to

view all parameters.

These parameters can be adjusted using the

Parameters menu. To adjust the parameters, go to

Menu > Setup > Profiles > Parameters (see section

6-2). From the Basic, AP380 or Compass screens,

press to open the Parameters menu directly.

Adaptive

This is an adaptive response setting where the

AP380 adjusts how far the boat can move off

course to maintain a constant rate of rudder

corrections. The adaptive setting eliminates the

need to set the response according to varying

weather conditions.

• The range is A1 (adapts slowly) to A5 (adapts

quickly).

Response (dead band)

How far the boat will be allowed to fall off

course before it makes a correction.

A lowest response setting lets the boat

fall very far off course before the AutoPilot

corrects. The highest response setting

corrects for every boat movement

• The range is 1 (broad course keeping) to 10

(tight course keeping).

Ratio (gain)

How far the rudder moves relative to the

degrees of course error

• The range is 1 (small corrections) to 10 (large

corrections).

Trim

Trim gain -(Integral gain) Watches if the boat

is off course consistently in one direction

(Ex. Due to a strong wind, or poor weight

distribution ).Trim Gain causes the AP380 to

slowly apply extra rudder in the opposite

direction to correct for the course error.

• The range is 1 (trim slowly) to 10 (trim quickly)

and 0 (OFF no trim effect).

C-rudder

Counter rudder gain – (derivative gain) At the

end of the turn, counter rudder will steer in

the opposite direction to help stop the turn

at the desired heading. If the boat is turning

quickly towards the set course, the AP380

with start to apply rudder in the opposite

direction to prevent to boat steering past

the desired direction, this is called counter

rudder. Counter rudder gain sets how strong

this effect is.

• The range is 1 (low: Most often used with a

plaining boat) to 10 (high : Most often used

with a sail boat or displacement boat) and 0

(OFF no counter rudder effect).

GPS gain

In GPS mode, this determines how much

correction is applied to remove cross track

error.

• The range is 1 (steer gently back on track) to

10 (steer quickly back on track).

Wind gain

In wind mode, this determines how much

correction is applied to reduce any difference

between the set wind angle and the actual

wind angle.

• The range is 1 (slowly affected by wind

change) to 10 (sensitive to wind change).

8 Optimising steering performance


Optimum steering

Change the values of the steering parameters for

optimum steering performance.

Generally:

• For calm seas, increase response; for rough

seas (or to save power) decrease response.

• For higher boat speeds, decrease ratio; for

lower speeds, increase ratio.

• In case of cross-winds or weather-helm,

increase trim; In case of balanced steering,

decrease trim.

• For large displacement boats and boats

with insensitive steering, increase counter

rudder; for lightweight boats and boats with

responsive steering, decrease counter rudder.

• For higher boat speeds and large GPS routes,

decrease GPS gain; for lower speeds and tight

GPS routes, increase GPS gain.

• For higher and/or more stable winds, increase

wind gain; for lower and/or unstable winds,

decrease wind gain.

Ideally, in AUTO the AP380 should steer the boat

to the course without the rudder moving too

often.

8-2 ProfilesThe AP380 provides five configurable steering

profiles that can be quickly recalled to alter the

AP380’s performance based on changing sea,

environmental and vessel conditions.

• To change a profile go to: Menu > Setup >

Profiles > Profile menu.

Each of the five profiles can be individually

named and configured with different steering

performance settings, and recalled as needed.

To name the currently selected profile, go to

Menu > Setup > Profiles > Edit name then:

• Use the Control Dial, and to edit

the name of the profile.

• Rotate the Control Dial to select numerical

and upper and lower case alphabetical

characters. Maximum number of

alphanumeric characters is 8.

• Repeatedly press to finish editing.

Note: When using more than one Explorer AP380,

profile names are not transferred between units.

So when naming profiles, be sure to name the

profile on each Explorer AP380.

How to use profiles:

1. When the AP380 is installed, the steering

parameters in all the profiles are set to their

default values.

2. Select User 1, and adjust the steering

parameters for optimum steering in typical

conditions.

3. If the conditions change and the steering is

no longer optimum, select another profile

and adjust the steering parameters again

Repeat this step as required to adjust the

parameters in each profile.

4. When using the AP380 to steer, select a

profile suitable for the current conditions. For

example different profiles can be configured

for rough conditions and calm conditions,

sailing or motoring.


8-3 Adjusting the steering parameters

Problem: drifts off course to one side

Increase ratio.

Increase trim gain.

Increase response.or

Problem: boat moves too far off course closely before the rudder turns to correct the course

Decrease ratio.

Decrease counter rudder gain.

Decrease trim gain.

This causes wear on the steering linkage and uses

power.

Decrease response.

Reduce ratio.

Reduce counter rudder gain.

Problem: rudder turns too frequently

Problem: oscillations from side to side build up

Decrease ratio.

Problem: after a large course change, boat takes too long to settle to new course

Decrease counter rudder gain

Problem: after a large course change, boat overshoots and oscillates before settling to new

course

Increase counter rudder gain


Increase trim gain

Decrease trim gain

1 minute

1 minute

a Boat takes much more than one minute to trimSideways force starts

b Boat takes much less than one minute to trimSideways force starts

Problem: boat oscillated around GPS course

Decrease GPS gain.

Increase GPS gain.

Problem: drifts off GPS course

or

or

Problem: after a sideways current or wind, the correction is applied too quickly or too slowly

If the boat encounters a sideways force, then it will move off course sideways. The AP380 will

automatically bring the boat back to the correct heading by applying a few degrees of rudder, called

trim. Trim gain sets how quickly the trim is applied. Trim gain should be adjusted to trim the boat in

about one minute. Getting the Trim gain setting right can be difficult for your specific boat and it is easy

to alter the Trim gain too much. Change the settings slowly and conservatively at first, until the right

settings are known.


This troubleshooting guide assumes that you

have read and understood this manual.

It is possible in many cases to solve difficulties

without having to send the unit back to the

manufacturer for repair. Please follow this

troubleshooting section before contacting the

nearest Northstar dealer.

There are no user serviceable parts. Specialized

methods and testing equipment are required to

ensure that the unit is reassembled correctly.

Repairs to the unit must only be carried out by a

service centre approved by Northstar.

Users who service the unit themselves will void

the warranty. More information can be found on

our Website: www.northstarnav.com.

1 Unit will not turn on:

a Fuse blown or circuit breaker tripped.

b Battery voltage is outside the range 10.5 to

30.5 V DC.

c Power/data cable damaged.

2 AP380 makes too frequent course

corrections:

The value of response is too low (see

section 8-1).

3 When sailing a straight course, the boat

drifts from side to side of the course:

a The boat should drift from side to side of the

course when the AP380 steering is optimized.

b Change to a profile suitable for boat speed

and sea conditions (see section 8-2).

c If the boat drifts too far from the course,

adjust response, ratio, counter rudder gain,

GPS gain (if AP380 is in GPS mode) or wind

gain (if AP380 is in wind mode)

(see section 8-1).

9 Troubleshooting

4 When sailing a straight course, the boat

drifts off course:

a Change to a profile suitable for boat speed


b Adjust response, ratio, counter rudder gain,

GPS gain (if AP380 is in GPS mode) or wind

gain (if AP380 is in wind mode)

(see section 8-1).

5 When making a large course change, boat

does not follow the expected course:

a Change to a profile suitable for boat speed


b Check turn rate is not too low

(see section 6-3).

c Adjust counter rudder gain

(see section 8-1).

6 Boat turns too sharply:

Reduce turn rate (see section 6-3).

7 The word SIMULATE flashes on the

display, values displayed are unexpected:

Unit is in simulate mode (see section 3-14).

8 The display fogs:

a Moist air has entered the breathing tube at

the rear of the unit. Air the boat or run unit

with backlight fully on.

b Water has entered the breathing tube. Return

unit for service.


Electrical

Supply voltage: 10.5 to 30.5 V DC.

Supply current ( at 13.8 V):

Without backlighting: 160 mA.

With full backlighting: up to 410 mA.



Interfaces

NavBus: connection to MCU and other Northstar

instruments.

AP380 Display unit power/data cable wires:

Black connector - Power


5 Red Power positive, 10.5 to 30.5 V DC


6 Orange NavBus +

4 Blue NavBus -



8 Green External alarm, switched to ground, 30 V DC and 250 mA max.

2 Brown +9V out

Green connector - NavBus expansion


5 Red Factory use (isolate, do not cut)


6 Orange NavBus +

4 Blue NavBus -



8 Green Factory use (isolate, do not cut)

2 Brown +9V out

Standards compliance

EMC compliance:

USA (FCC): Part 15 Class B


New Zealand and Australia (C Tick):

IEC 60945:2002 Clause 9.

Environment:

IPx6 and IPx7 - completely waterproof.

10 Specifications

Made in New ZealandMN000624A-G


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