AT SEA – CHANGING THE WATCH

MARITIME ENGLISH II

Öresund Kotka

conning the shiphaving the responsibility and authority for the

operation and steering

helmsman a person (especially a man) who steers a ship

the compass card settles on the

markSteering 150 degrees

an instrument that shows directions and

has a needle that always points north

Ease to five

Reduce amount of rudder to 5° and hold

ARPA

•

Automatic Radar Plotting Aid

a gyro compass magnetic compass

A navigational compass fitted with a

gyroscope instead of a magnetic

indicating true north.

A compass based on a magnetic needle that

points to the magnetic north

a speed log an electronic chart

a navigation tool seafarers use to

estimate the speed of a vessel through

water

contains the dataset of relevant information

for a voyage

an echo sounder a wind measuring station

GMDSS - Global Maritime Distress and Safety System

is an internationally

agreed-upon set of

safety procedures,

types of equipment,

and communication

protocols used to

increase safety and

make it easier to

rescue distressed

ships, boats and

aircraft.

VHF Medium Frequencies

is the range of radio frequency

electromagnetic waves (radio waves)

from 30 to 300 megahertz (MHz)

also referred to as the midrange, is typically

the frequency range between 300Hz and

5,000Hz. This is the range where the

majority of audio content is in most music,

movies and TV shows.

Narrow Band Direct Printing

(NBDP)

navigational warnings

high traffic density CPA

closest point of approach

Lively traffic An estimated point in which the

distance between two objects, of

which at least one is in motion, will

reach its minimum value

Midships

in or toward the middle

of a ship; esp., halfway

between bow and stern

(amidships)

AIS - AUTOMATIC IDENTIFICATION SYSTEM

tracking system

that uses

transceivers on

ships and is used

by vessel traffic

services (VTS)

NARROW BAND DIRECT PRINTING

is a telex. A way to

communicate with text

rather than by voice. It is

said that NBDP was

introduced in the GMDSS to

help seafarers whose first

language was not English.

INMARSAT SHIP STATION

It’s capable of

• transmitting and receiving

• distress and safety signals

using NBDP,

• priority distress calls, and

• general communications,

using voice

communications or NBDP

SATNAV

•

Wind Measuring Station

Device used for

measuring the speed

of wind, and is also a

common weather

station instrument.

the bearing

To find out where you are with the

aid of a fixed position.

is the direction

from your

location to any

distant point

given in

degrees from

north

sextant an instrument with a

graduated arc of 60° and a

sighting mechanism, used for

measuring the angular

distances between objects

and especially for taking

altitudes in navigation.

dead reckoning

is the process of

calculating current

position of some

moving object by

using a previously

determined position,

or fix, and then

incorporating

estimations of

speed, heading

direction, and

course over elapsed

time.

ballast tanks

Compartments

within a ship that

holds water,

which is used as

ballast to provide

stability for a

vessel.

seamarks aids to navigation

ship’s masts

The mast of a

sailing vessel is

a tall spar,

erected more or

less vertically

on the centre-

line of a ship or

boat.