nautical safety

8/7/2019 NAUTICAL SAFETY

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RULES FORCLASSIFICATION OF

DET NORSKE VERITAS

Veritasveien 1, N-1322 Hvik, Norway Tel.: +47 67 57 99 00 Fax: +47 67 57 99 11

SHIPS

NEWBUILDINGS

SPECIAL EQUIPMENT AND SYSTEMSADDITIONAL CLASS

PART 6 CHAPTER 8

NAUTICAL SAFETYJANUARY 2001

CONTENTS PAGE

Sec. 1 General ....................................................................................................................................... 5Sec. 2 Design of Workplace................................................................................................................ 12Sec. 3 Bridge Working Environment .................................................................................................. 25Sec. 4 Carriage Requirements for Navigational Systems and Equipment .......................................... 27Sec. 5 General Bridge Equipment Requirements................................................................................ 31

Sec. 6 Specific

Requirements

for

Different

Types

of

Bridge

Equipment........................................... 34Sec. 7 Man and Machine Interface...................................................................................................... 41Sec. 8 Ship Manoeuvring Information ................................................................................................ 44Sec. 9 Qualifications and Operational Procedures .............................................................................. 46Sec.10 Bridge Equipment Tests ........................................................................................................... 47


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CHANGES IN THE RULES

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Typesetting

(FM+SGML)

by

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Norske

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Printed in Norway by GCS AS.

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General.

This completely revised chapter was approved by the Board in De-cember 2000, and supersedes the July 1991 edition of the same chap-ter including later amendments.

The rules come into force on 1 July 2001.

This chapter is valid until superseded by a revised chapter. Supple-

ments

will

not

be

issued

except

for

an

updated

list

of

minor

amend-ments and corrections, which will be presented in Pt.0 Ch.3 Sec.1.Pt.0 Ch.1 is normally revised in January and July each year.

Revised chapters will be forwarded to all subscribers to the rules.Buyers of reprints are advised to check the updated list of rule chap-ters printed in Pt.0 Ch.1 Sec.1 to ensure that the chapter is current.

Main changes

Section 1 General

Some definitions in sub-section C have been reworded, new def-initions have been added.

The class notations in sub-section D have been re-organised asfollows:

Class notation NAUT-C covering bridge design, which isincluded in W1-OC, has been deleted.

The remaining notations W1-OC and W1 cover the techni-cal part of the rules.

The class notation will be extended with a suffix Q whenSec.9 is complied with, making the notation W1-OC-Q andW1-Q, respectively. Sec.9 requires qualifications relevantfor operation of the automatic grounding avoidance systeminstalled and operational procedures.

The requirements for documentation to be submitted have beenrevised.

Section 2 Design of Workplace

The content of sub-section B on bridge and workstation arrange-ment has been re-structured and also includes the requirements

for

location

of

equipment. Requirements regarding height of lower edge of bridge windows

for W1-OC ships have been modified.

The use of approved technical means for compliance with the re-quired view astern outside the sector for bridge visibility relatedto collision avoidance is indicated.

Section 4 Carriage Requirements for Navigational Systems and Equipment

The section has been restructured and the requirements have

been

made

more

specific.

Relevant

equipment

has

been

groupedunder collision avoidance system, grounding avoidance systemand heavy weather avoidance system.

Section 6 Specific Requirements for Different Types ofEquipment

This section has been restructured and rationalised. Specific re-quirements, which are now covered by IMO performance stand-ards, as for electronic chart systems (ECDIS), have been replacedby a reference.

Requirements for Grounding Avoidance System (GAS) are re-placing the former Automatic Navigation and Track-keepingSystem (ANTS). Detailed functional requirements have been es-tablished to govern the manufacturer's development.

Requirements for alarm management system have been re-organ-ised.

The

sub-section

for

internal

communication

is

harmonised

withnew IMO and classification requirements.

Section 7 Man and Machine Interface

This section has been rationalised, taking into considerationtransfer of previous requirements for main class.

Section 8 Ship Manoeuvring Information

This section has been harmonised with IMO requirements.

Section 9 Qualifications and Operational Procedures

This section has been rationalised by only maintaining require-ments addressing the competence required for mastering thegrounding avoidance system installed, when applicable, and pro-cedures required for bridge operations under different operating

conditions.

Non-compliance

does

not

affect

the

assignment

ofthe basic class notations W1-OC and W1. Compliance extendsthe basic class notations with the suffix Q.


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Rules for Ships, January 2001Pt.6 Ch.8 Contents Page 3

DET NORSKE VERITAS

CONTENTS

SEC. 1 GENERAL............................................................ 5

A. The Classification Concept...................................................5A 100 General..............................................................................5

A 200 Objectives

of

the

rules.......................................................5A 3 00 Safety philosophy..............................................................5

B. Scope of Classification and Rule Requirements.................5B 100 General..............................................................................5B 2 00 Scope of classification ......................................................6B 3 00 Scope of rule requirements ...............................................6B 400 Structure of the rules.........................................................6

C. Definitions ..............................................................................7C 100 Terms ................................................................................7

D. Class Notations ......................................................................8D 100 General..............................................................................8D 200 Contents of class notations and extensions .......................8D 300 Documentation of compliance ..........................................8D 400 Class assignment...............................................................9

E. Documentation for Approval ...............................................9E 100 Class notation W1-OC and W1........................................9

F. Documentation for Information ........................................10F 100 Class notation W1-OC and W1......................................10

G. Functional Tests ..................................................................10G 100 Class notation W1-OC and W1......................................10

SEC. 2 DESIGN OF WORKPLACE ............................ 12

A. General.................................................................................12A 100 Scope...............................................................................12A 200 Application......................................................................12

B. Bridge and Workstation Arrangement.............................12B 1 00 Ge neral requirements ......................................................12B 200 Passageways and clear deckhead height .........................12B 3 00 Co nsole configuration.....................................................13B 400 Chairs ..............................................................................13

C. Workstations for Primary Bridge Functions....................13C 100 Scope...............................................................................13C 2 00 Ge neral requirements ......................................................13C 300 Workstations for navigation and traffic surveillance and

manoeuvring ...................................................................13C 400 Workstations for conning................................................16C 500 Workstation for route planning.......................................16C 600 Workstations for manual steering ...................................1 7C 700 Workstation for safety monitoring and emergency

operations........................................................................17C 800 Workstations for docking operations ..............................18

D. Additional Workstations ....................................................19D 1 00 Ge neral requirements ......................................................19D 200 Workstation for communication .....................................19

E. Bridge Configuration..........................................................19E 100 General............................................................................19E 200 Field of vision .................................................................19E 300 Blind sectors....................................................................22E 400 Clear view through windows ..........................................23E 500 Sound signal reception....................................................23

F. Requirements Specific for Class Notation W1..................23F 100 General............................................................................23F 200 Workstations for navigation and traffic surveillance and

manoeuvring ...................................................................23F 300 Workstations for docking operations ..............................23

F 400 Field of vision .................................................................23

SEC. 3 BRIDGE WORKING ENVIRONMENT......... 25

A. Requirements for Bridge Working Environment ............25A 100 Application......................................................................25

A 200 General............................................................................25A 300 Vibration .........................................................................25A 400 Noise ...............................................................................25A 500 Lighting...........................................................................25

A 600 Temperature ....................................................................25A 700 Ventilation....................................................................... 25A 800 Surfaces...........................................................................26A 900 Colours............................................................................26A 1000 Safety of personnel .........................................................26

SEC. 4 CARRIAGE REQUIREMENTS FOR NAVIGATIONAL SYSTEMS AND EQUIPMENT..................................................... 27

A. General ................................................................................ 27A 100 Scope...............................................................................27A 200 Application......................................................................27A 30 0 Ge ne ral requirements ...................................................... 27

B. Carriage Requirements ..................................................... 27

B 100 General............................................................................27B 2 00 He ad ing information systems .........................................27B 3 00 Ste erin g systems..............................................................27B 400 Speed measuring system.................................................27B 500 Depth measuring system.................................................27B 600 Radar systems .................................................................27B 700 Collision avoidance system.............................................28B 800 Nautical chart system......................................................28B 900 Grounding avoidance systems ........................................28B 1000 Heavy weather avoidance system ................................... 28B 1100 Watch monitoring and alarm transfer system. ................29B 1200 Internal communication systems.....................................29B 13 00 Ne w carriage requirements (SOLAS Chapter V, as

amended by res. MSC.99(73)) ........................................ 29

C. Carriage Requirements for Class Notation W1............... 29C 100 General............................................................................29C 2 00 Syst ems and equipment...................................................29

SEC. 5 GENERAL BRIDGE EQUIPMENT REQUIREMENTS............................................. 31

A. General ................................................................................ 31A 100 Application......................................................................31A 20 0 Ge ne ral requirements ...................................................... 31

B. Environmental Conditions ................................................ 31B 100 Environmental conditions ............................................... 31

C. Location and Installation of Equipment .......................... 31C 100 Installation....................................................................... 31C 200 Interference ..................................................................... 31C 300 Radiation hazard .............................................................31

C 400 Vibration and shock isolation .........................................31C 500 Temperature protection...................................................32C 60 0 Hu midit y protection ........................................................ 32C 7 00 C ompass safe distance ....................................................32

D. Electrical Power Supply, Alarms, Performance Confirmation and Failure Protection............................... 32

D 100 Electrical power supply...................................................32D 200 Alarms.............................................................................32D 300 Performance confirmation ..............................................33

E. Computer-based Systems and Software Quality............. 33E 100 Computer-based systems ................................................33E 20 0 Softwa re quality..............................................................33

SEC. 6 SPECIFIC REQUIREMENTS FOR

DIFFERENT

TYPES

OF

BRIDGE

EQUIPMENT..................................................... 34

A. General ................................................................................ 34A 100 Scope...............................................................................34A 200 Application......................................................................34


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Rules for Ships, January 2001Pt.6 Ch.8 Contents Page 4

DET NORSKE VERITAS

B. Heading Information System............................................. 34B 1 00 Co mpa ss systems ............................................................34

C. Steering Systems .................................................................34C 100 General............................................................................34C 2 00 Manual steering systems .................................................34C 3 00 He ading control system...................................................34C 400 Track control system .......................................................35

D. Speed Measuring System ................................................... 35D 100 De vi ce to indicate speed and distance.............................35

E. Depth Measuring System ................................................... 35E 100 Echo sounding equipment ..............................................35

F. Radar Systems..................................................................... 35F 100 Radar equipment .............................................................35

G. Collision Avoidance System...............................................36G 100 Radar with automatic plotting aid (ARPA).....................36G 200 Sound reception system ..................................................36

H. Grounding Avoidance System ........................................... 36H 1 00 Ge nera l functions ............................................................36H 200 Syste m configuration ......................................................36H 300 Syste m reliability ............................................................37H 400 Position-fixing systems ...................................................37H 500 Electronic chart display and information

system (ECDIS) ..............................................................38H 6 00 Co nnin g information display ..........................................38

I. Bridge Alarm Management ............................................... 39I 100 General............................................................................39I 200 Central alarm panel .........................................................39I 300 Alarm and warning transfer system ................................39I 400 Watch monitoring system ...............................................40

J. Nautical Internal Communication Systems .....................40J 100 Ext ernal communication equipment ...............................40J 200 Inte rna l communication equipment ................................40

SEC. 7 MAN AND MACHINE INTERFACE ............. 41

A. General Requirements ....................................................... 41A 100 Application......................................................................41

B. Instrument Location and Design.......................................41B 100 General............................................................................41B 200 Location ..........................................................................41B 300 Design .............................................................................41

C. Illumination and Individual Lighting of Instruments....42C 100 General............................................................................42C 200 Illumination.....................................................................42

D. Requirements for the Man and Machine Dialogue ofComputer-based Systems................................................... 42

D 100 General............................................................................42

SEC. 8 SHIP MANOEUVRING INFORMATION ..... 44

A. General ................................................................................ 44A 100 Scope...............................................................................44A 200 Application......................................................................44A 300 General............................................................................44A 400 Manoeuvring information ...............................................44

A 500 Si st er ships ......................................................................44

B. Provision of Manoeuvring Information...........................44B 100 General............................................................................44B 2 00 Speed ability....................................................................44B 300 Stopping ability ............................................................... 44B 4 00 Tu rni ng ability.................................................................44B 5 00 Course change ability......................................................45B 600 Low speed steering abilities ............................................45B 7 00 Course stability ...............................................................45B 800 Auxiliary manoeuvring device trial ................................45B 900 Man-overboard rescue manoeuvre..................................45

C. Presentation of Manoeuvring Information ..................... 45C 1 00 Pilot card .........................................................................45C 200 Wheelhouse poster .......................................................... 45C 300 Manoeuvring booklet ...................................................... 45

SEC. 9 QUALIFICATIONS AND OPERATIONAL PROCEDURES .................................................. 46

A. General.................................................................................46A 1 00 Scope..............................................................................46A 200 Application......................................................................46A 300 Operational assumptions .................................................46

B. Q ualifications ......................................................................46B 100 General............................................................................46B 200 Knowledge requirements ................................................46

C. Bridge Procedures ..............................................................46C 100 Procedures for safe watch-keeping .................................46

SEC. 10 BRIDGE EQUIPMENT TESTS....................... 47

A. General.................................................................................47A 100 Application......................................................................47

B. On board Testing of Bridge Equipment ...........................47B 100 General............................................................................47B 200 Test program ................................................................... 47

B 3 00 Gen era l

requirements

for

the

testing

of

all

types

of

bridge equipment.............................................................47B 400 Gyro compass..................................................................47B 500 Automatic steering system .............................................. 47B 6 00 Rudder indicator(s) .........................................................47B 700 Rate-of-turn indicator......................................................47B 8 00 Speed log.........................................................................47B 900 Echo sounder...................................................................47B 1000 Radar system ................................................................... 47B 1100 ARPA system..................................................................48B 1200 Electronic position-fixing systems..................................48B 1300 Watch monitoring and alarm transfer system .................48B 1400 Internal communication systems.....................................48B 1500 Nautical communication system ..................................... 48B 1600 Sound reception system ..................................................48B 1700 Computer system(s) ........................................................48

B 1800 Electronic

chart

display

and

information

system (ECDIS) ..............................................................48B 1900 Grounding avoidance system .......................................... 48B 2000 Conning display ..............................................................48

C. On board Check of Qualification Assurance System .....48C 100 General............................................................................48


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Rules for Ships, January 2001Pt.6 Ch.8 Sec.1 Page 5

DET NORSKE VERITAS

SECTION 1GENERAL

A. The Classification Concept

A 100 General

101 The text in A describes the concept with regard to objec-tives and safety philosophy on which the rules for nauticalsafety are based. Consequently, the contents of A are not to beunderstood as rule requirements.

A 200 Objectives of the rules

201 The main objectives of the rules for nautical safety are toreduce the risk of failure in bridge operation causing collision,grounding and heavy weather damage.

202 The rules aim at giving requirements to regulate ship-board factors affecting safety and efficiency in bridge opera-tions and, in this context, include:

relevant requirements and recommendations adopted bythe International Maritime Organization (IMO)

relevant international standards within the subjects of therules or indicating the points in which they differ.

A 300 Safety philosophy

301 In order to achieve optimum safety and efficiency inbridge operation, the rules address the total bridge system. Thetotal bridge system is considered to comprise four essentialparts, see Fig.1:

the technical system, which is to deduce and present infor-mation as well as enable the proper setting of course andspeed

the human operator, who is to evaluate available informa-tion, decide on the actions to be taken and execute the de-cisions

the man and machine interface, which shall safeguard thatthe technical system is designed with due regard to humanabilities

the procedures, which shall ensure that the total bridgesystem performs satisfactorily under different operatingconditions.

Fig. 1The total bridge system

302 Degradation of one part of the bridge system affects thefunctioning of all the other parts. In order to reduce the risk of

malfunction

of

the

total

bridge

system,

the

rule

requirementsare established to regulate the factors affecting the safe per-formance of any part of the system and to ensure a consistentlevel of system reliability in various modes of operation underdifferent operating conditions.

See Fig.1 and Fig.2.

303 The main elements of the various parts of the bridge sys-tem are considered to comprise, see Fig.1:

qualifications, capacity and quality of the human operatorin relation to the functions to be carried out

specification, automation level and condition of the tech-nical system in relation to information needs, workloads

and

reliability physical abilities and information processing capacity ofthe human operator in relation to working conditions andthe technical systems he is to operate

tasks to be performed and technical aids available undervarious operating conditions as basis for establishingworking routines and operating procedures.

304 With the exception of operator quality, the elementsmentioned in 303 form the basis for the rules given. It is be-lieved that improvements within these elements can also havea positive effect on operator quality (personality, responsibili-ty), which in the context of classification is considered to be amatter of selection of personnel.

B. Scope of Classification and Rule Require-ments

B 100 General

101 Classification of bridge systems verifies compliancewith the rules developed for the safe performance of bridgefunctions. The classification concept involves affirmationthrough voluntary class notations that the requirements, of therules and other standards referred to have been fulfilled forbridge design, instrumentation, working environment, opera-tor quality and procedures.

102 The rules take into consideration that the modes of oper-ation and the manning of the bridge will vary in accordancewith the condition of internal technical systems and the avail-ability of relevant external systems, and that operating condi-tions can be influenced by the waters to be navigated, trafficand weather conditions.

103 The rules aim at safeguarding that the officer of the nav-igational watch, at his workstation, has full control of all theprimary functions he is responsible for, including the look outfunction, within the operational limits indicated by the classnotations W1-OC and W1. Furthermore, that the bridge ena-bles safe and efficient co-operation by two navigators when re-quired, and that relevant procedures are established and theofficer of the watch is qualified to operate the technical sys-

tems

as

indicated

by

the

suffix

Q.Guidance note:

It should be noted that the manning of the navigational watch atall times shall be in accordance with the national regulations ofthe flag state and for the waters in which the ship is operating.


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DET NORSKE VERITAS

This is considered the responsibility of the master of the ship andthe officer of the watch.

---e-n-d---of---G-u-i-d-a-n-c-e---n-o-t-e---

104 The bridge system on ships where a grounding avoid-ance system or an automatic track keeping system is installedand in use is not considered compliant with requirements forsafe navigation if the master and the officer of the watch do not

hold the certificate of competence in accordance with theknowledge requirements given in Sec.9 B200. See also Sec.9A300 and Sec.9 B100.

B 200 Scope of classification

201 Safe performance of the bridge system is qualified by itsability to determine, execute and maintain the right course andspeed of the ship in relation to the waters, the traffic and theweather. This ability is threatened by:

internal bridge system failure loss of manoeuvrability (steering and propulsion) loss of external information.

202 The main concern of the rules for nautical safety is toprevent internal bridge system failures and, in this context, toaddress all parts of the system as defined in A301.

203 The required reliability of propulsion and steering sys-tems for preventing loss of manoeuvrability is addressed by therules for main class. The concern of the rules for nautical safetyin this context is to safeguard that:

the implications of failure in propulsion and steering sys-tems are taken into consideration in the design of thebridge system, and that system degradation is brought tothe attention of the watch officer by relevant warnings

the emergency steering system in the steering gear com-partment is properly arranged for safe and efficient opera-tion.

204 With regard to loss of external information, the concernof the rules for nautical safety is to safeguard that:

the shipborne part of an external navigation or communi-cation system detects loss of information caused by failurein the external systems.

205 The technical reliability of any system to be operatedfrom the bridge serving functions additional to those related tothe safe navigation of the ship, such as machinery systems, car-go and ballast systems, safety monitoring systems, etc., is ad-dressed in other parts of the rules for main class. The concernof the rules for nautical safety in this context is:

the location of workstations for additional bridge func-

tions the working conditions for performance of additional

functions being the responsibility of the officer of thewatch

the man and machine interface of technical systems serv-ing additional bridge functions if the system is to be oper-ated by the officer of the watch

the integration of any system interfaced to a network forperformance of main bridge functions.

B 300 Scope of rule requirements

301 The requirements given in each section address the ele-ments of the bridge system affecting the safety of navigation asspecified in A300, and regulate the following areas with the

aim

to

reduce

the

probability

of

bridge

system

failure,

seeFig.2:

design of workplace, based on analyses of functions to beperformed under various operating conditions and thetechnical aids to be installed

bridge working environment, based on factors affectingthe performance of human operators

range of instrumentation, based on information needs andefficient performance of navigational tasks

equipment reliability applicable to all types of bridgeequipment, based on common requirements to ensure theirsuitability under various environmental conditions

performance

of

different

types

of

bridge

equipment,

basedon their specific functions

man and machine interface, based on the analyses of hu-man limitations and compliance with ergonomic princi-ples

qualifications , based on the competence required for mas-tering rational navigational methods and relevant techni-cal systems installed on board the ship

operating procedures, based on the need to make thebridge system function under different operating condi-tions

information on the ships manoeuvring characteristics,based on the knowledge needed for safe performance ofmanoeuvring operations

tests and trials based on the need to ensure that technicalsystems perform in accordance with their approved speci-fications before being relied upon and used in practical op-eration.

Fig. 2Overview of bridge system areas affecting safe and efficient oper-ations

B 400 Structure of the rules

401 The rules are structured to:

establish functional requirements to the greatest possibleextent

give guidance as to how functional requirements can bemet by technical solutions or other remedies that safeguardthe performance of the function.

402 A functional requirement is as far as possible expressedwithout quantification. The functional requirements have aprinciple status and will only be adjusted if the functions to be

carried

out

on

the

bridge

are

altered.403 A Guidance note, as far as possible, quantifies solutionsthat can be approved, but does not exclude the application ofalternative solutions provided the functional requirements aremet.


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DET NORSKE VERITAS

C. Definitions

C 100 Terms

101 Abnormal operating conditions. When internal technicalsystem failures require operation of back-up systems on thebridge or when they occur during an irregular operating condi-tion, or when the officer of the watch becomes unfit to perform

his

duties

and

has

not

yet

been

replaced

by

another

qualifiedofficer.

102 Additional bridge functions. Functions performed on thebridge while the ship is under way, but not related to primarybridge functions. Examples of such functions are:

general communication functions cargo monitoring and planning functions extended monitoring and control of machinery monitoring and control of domestic systems.

103 Back-up navigator. A navigational officer who has beendesignated by the ships master to be on call to assist or replacethe officer of the watch when required.

104 Blind sector. An obstruction in a field of vision with aclear sector on both sides.

105 Bridge system. The total system for the performance ofbridge functions, comprising bridge personnel, technical sys-tems, man and machine interface and procedures.

106 Bridge wing. The part of the bridge on each side of thewheelhouse, which extends to the ships side.

107 Bridge. The area from which the navigation and controlof the ship are exercised, comprising the wheelhouse and thebridge wings.

108 Catwalk. Arrangement outside the wheelhouse allowinga person safe access to windows along the front bulkhead(s).

109 Coastal waters. Waters that encompass navigation

along

a

coast

at

a

distance

less

than

the

equivalence

of

30

min-utes of sailing with the relevant ship speed. The other side ofthe course line allows freedom of course setting in any direc-tion for a distance equivalent to at least 30 minutes of sailingwith the relevant speed.

110 Collision avoidance functions. Detection and plotting ofother ships and moving objects; determination and executionof course and speed deviations to avoid collision.

111 Commanding view. View without obstructions, whichcould interfere with the navigators ability to perform his maintasks, at least covering the field of vision required for safe per-formance of collision avoidance functions.

112 Conning information display. A screen-based informa-tion system that clearly presents information from sensor in-

puts relevant to navigation and manoeuvring, as well as allcorresponding and upcoming orders given by an automaticnavigation system to steering and propulsion systems if con-nected.

113 Conning station or position. Place in the wheelhousewith a commanding view providing the necessary informationfor conning, and which is used by navigators when monitoringand directing the ships movements.

114 Display. An observable illustration of an image, scene ordata on a screen.

115 Docking. Manoeuvring the ship alongside a berth andcontrolling the mooring operations.

116 Easily accessible. Within 5 m distance from working po-

sition.117 Electronic chart display and information system(ECDIS). A navigation information system, which with ade-quate back-up arrangements can be accepted as complyingwith the up-to-date chart required by regulation V/20 of SO-

LAS, and be accepted as meeting the chart carriage require-ments of SOLAS Chapter V, as amended by res. MSC.99(73),by displaying selected information from a system electronicnautical chart (SENC).

118 Electronic chart systems (ECS). A Generic term forequipment that displays chart data but which is not intended tocomply with the IMO performance standards for ECDIS, and

is

not

intended

to

be

accepted

as

meeting

the

chart

carriage

re-quirements of SOLAS Chapter V.

119 Electronic nautical chart (ENC). The database, stand-ardised as to content, structure and format, issued for use withECDIS on the authority of government authorised hydrograph-ic offices.

120 Ergonomics. Application of the human factors implica-tion in the analysis and design of the workplace and equip-ment.

121 Field of vision. Angular size of a scene that can be ob-served from a position on the ships bridge.

122 Helmsman. Person who steers the ship under way.

123 Irregular operating conditions. When external condi-

tions cause excessive operator workloads.

124 Manoeuvring. Operation of steering systems and propul-sion machinery as required to move the ship into predeter-mined directions, positions or tracks.

125 Monitoring. Act of constantly checking informationfrom instrument displays and environment in order to detectany irregularities.

126 Narrow waters. Waters that do not allow the freedom ofcourse setting to any side of the course line for a distanceequivalent to 30 minutes of sailing with the relevant shipspeed.

127 Navigation. Planning of the ships route and determina-tion of position and course of the ship, execution of course al-terations and speed changes.

128 Normal operating conditions. When all shipboard sys-tems and equipment related to primary bridge functions oper-ate within design limits, and weather conditions or traffic, donot cause excessive operator workloads.

129 Ocean areas. Waters that encompass navigation beyondthe outer limits of coastal waters. Ocean areas do not restrictthe freedom of course setting in any direction for a distanceequivalent to 30 minutes of sailing with the relevant shipspeed.

130 Officer of the watch. Person responsible for the safety ofnavigation and bridge operations until relieved by anotherqualified officer.

131 Primary bridge functions. Functions related to determi-nation, execution and maintenance of safe course, speed andposition of the ship in relation to the waters, traffic and weatherconditions. Such functions are:

route planning functions navigation functions collision avoidance functions manoeuvring functions docking functions monitoring of internal safety systems external and internal communication related to safety in

bridge operation and distress situations.

132 Route monitoring. Continuous surveillance of the shipssailing (position and course) in relation to a pre-planned routeand the waters.

133 Route planning. Pre-determination of course lines, radi-us turns and speed in relation to the waters to be navigated.


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DET NORSKE VERITAS

134 Screen. A device used for presenting visual informationbased on one or several displays.

135 SOLAS. The International Convention for the Safety ofLife at Sea, 1974.

136 Superstructure. Decked structure, not including funnels,which is on or above the freeboard deck.

137

System

electronic

navigational

chart

(SENC).

A

data-base resulting from the transformation of the ENC by ECDISfor appropriate use, updates to the ENC by appropriate meansand other data added by the mariner.

138 Wheelhouse. Enclosed area of the bridge.

139 Wheel-over-line. The line parallel to the new course linewhere the ship has to initiate a curved track to eliminate the ef-fect of any offset with respect to the new course, taking intoconsideration the distance required for the ship to build up thenecessary turn rate.

140 Wheel-over-point. The point where the ship has to initi-ate a curved track, taking into consideration the distance re-quired for the ship to build up the necessary turn rate.

141

Within

reach.

The

distance

the

operator

can

reach

anduse a control unit:

from a standing position at a console this distance is re-garded to be maximum 800 mm in forward direction and1400 mm sideways

from a seated position, at a distance of 350 mm from a con-sole, this distance is regarded to be maximum 1000 mm,and maximum 800 mm for frequently used equipment,which is to be within easy reach.

142 Workstation for communication. A work place for oper-ation and control of equipment for distress and safety commu-nication (GMDSS), and shipboard communication for shipoperations.

143 Workstation for primary bridge functions. A workplacewith commanding view used by navigators when carrying outnavigation, route monitoring, traffic surveillance and manoeu-vring functions, and which enables monitoring of the safetystate of the ship.

144 Workstation for safety operations. A workplace dedicat-ed organisation and control of internal emergency and distressoperations, and which provides easy access to information re-lated to the safety state of the ship.

145 Workstation. A work place at which one or several tasksconstituting a particular activity are carried out and which pro-vides the information and equipment required for safe per-formance of the tasks.

D. Class Notations

D 100 General

101 In order to offer classification that meets the individualneeds of ship owners, related to different types and trades ofships, as well as bridge procedures and qualifications related tothe equipment installed, the rules for nautical safety are divid-ed into two class notations, W1-OC and W1, and an additionalsuffix Q which may be attached to either class notation.

102 The class notation W1-OC give basic requirementswithin bridge design, instrumentation, and location of equip-

ment and bridge procedures.103 The class notation W1 extends the basic requirementsfor bridge design and instrumentation and, in addition, requiresan automatic grounding avoidance system and information onthe manoeuvring characteristics of the ship.

104 The suffix Q covers requirements for navigator qualifi-cations related to the use of the automatic grounding avoidancesystem installed, bridge procedures for safe watch-keeping andcommand of the ship under irregular and abnormal operatingconditions.

D 200 Contents of class notations and extensions

201 The class notation W1-OC covers the following mainareas:

mandatory and additional workstations field of vision from workstations location of instruments and equipment bridge working environment range of instrumentation instrument and system performance, functionality and re-

liability alarm management, including watch monitoring and alarm

transfer system.

202 The class notation W1 covers:

a) W1-OCb) Extensions within the following areas of W1-OC:

design of workstation for primary bridge functions field of vision astern range of instrumentation, incorporating electronic

chart system and track control instrument performance, supporting system integra-

tion automation level, incorporating an automatic ground-

ing avoidance system.

c) Areas additional to W1-OC:

information on the manoeuvring characteristics of theship.

203 The suffix Q covers:

qualifications of bridge personnel operational procedures.

D 300 Documentation of compliance

301 The class notations W1-OC and W1 imply that the shipis built and equipped in compliance with the relevant sectionsof this chapter.

302 The suffix Q added to the class notation implies that op-erational procedures and qualifications are established in com-pliance with Sec.9.

303 Ships satisfying the requirements for class notation W1-OC will have the following text entered in the "Appendix tothe classification certificate":

The class notation denotes that the bridge has been de-signed in accordance with established functional require-ments and principles of ergonomics for reduced workloadand improved operational conditions. Furthermore, thatthe bridge arrangement provides the information andequipment required for safe performance of the functionsto be carried out at dedicated workstations. The workingconditions are considered to enable the officer of thewatch to perform all primary bridge functions, includinglookout functions, from one workstation under normal op-

erating

conditions

in

ocean

areas

and

coastal

waters.

Guidance note:

It should be noted that the manning of the navigational watch atall times should be in accordance with the national regulations ofthe flag state and for the waters in which the ship is operating.


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DET NORSKE VERITAS

This is considered the responsibility of the master of the ship andthe officer of watch.


304 Ships fitted with a grounding avoidance system or an au-tomatic track keeping system will have the following note en-tered in the Appendix to the classification certificate:

It should be noted that the bridge system is only consid-ered compliant with rule requirements for safe navigationif the master and the officer of the watch hold a certificateof competence in accordance with the knowledge requiredfor safe operation of the integrated system in use.

305 Ships satisfying the requirements for class notation W1will have the following text entered in the "Appendix to theclassification certificate" in addition to the text for W1-OC:

The notation also denotes that, the bridge is equipped witha grounding avoidance system and designed to improvesafety of navigation and reduce the workload, enabling theofficer of the watch to perform all of the bridge functionshe is responsible for from pilot station to pilot station un-

der

normal

operating

conditions.

In

addition,

the

notationdenotes that the ship has extensive documentation of itsmanoeuvring characteristics.

306 Ships satisfying the operational requirements given inSec.9 will have the suffix Q added to the class notation and thefollowing text entered in the Appendix to the classificationcertificate:

The suffix Q denotes that a qualification assurance systemfor safe navigation has been established, ensuring appro-priate operational procedures and competent operation ofthe automatic grounding avoidance system.

D 400 Class assignment

401 The ship will be assigned class notation W1-OC whenthe relevant requirements given in Sec.2 to Sec.7 are compliedwith.

402 The ship will be assigned class notation W1 when therelevant requirements given in Sec.2 to Sec.8 are compliedwith.

403 The class notation assigned the ship will be extendedwith suffix Q when the requirements in Sec.9 are compliedwith.

E. Documentation for Approval

E 100 Class notation W1-OC and W1101 Drawings showing the bridge the configuration and di-mensions of the wheelhouse and bridge wings shall be submit-ted. The documentation shall include:

a) Height of front bulwark with windscreens when relevant.

b) Location, inclination and dimensions of windows.

c) Entrances to the wheelhouse and dimensions of doors.

d) Indication of windows with fresh water wash, wipers,heating and sunscreens.

102 A set of drawings showing compliance with require-ments for horizontal and vertical fields of vision shall be sub-

mitted.

The

drawings

shall

include

information

on:a) The vertical field of vision forward of the bow and the dis-

tance to the sea surface seen from the conning position andfrom the workstation for navigation and traffic surveil-lance in ballast condition. The blind sectors within the

field of vision required shall be identified and the size ofthe arc calculated.

b) The horizontal field of vision from each of the worksta-tions to be used by the watch officer during sea voyages.

c) The blind sectors caused by division between windowsand obstructions outside the wheelhouse seen from theworkstation for navigation, traffic surveillance and ma-

noeuvring

shall

be

identified

and

the

size

calculated.Drawings showing the shape and size of divisions betweenwindows shall be included.

103 A set of drawings and relevant documentation shall besubmitted, showing:

a) The bridge layout, including the configuration and loca-tion of workstations.

b) Configuration and dimensions of workstation consoles in-cluding console foundations.

c) Location of instruments and equipment in the consoles.

d) Location of equipment located elsewhere on the bridge.

e) A list showing all relevant bridge equipment, specifyingtype, model, manufacturer, supplier and type approval ref-erence with extension date or copy of valid certificates,when applicable.

104 Drawings showing arrangement of lighting (red andwhite) within the wheelhouse including all adjacent corridorsand compartments.

105 Documentation giving information on interior coloursfor bulkheads, deckheads, framing of windows and consolesshall be submitted. The colours should be indicated by usinginternational standards for colour reference.

106 Information on design and performance of the naviga-tional equipment specified in Sec.6, documenting compliancewith the rules, shall be submitted. The documentation shall in-

clude:

a) Technical specifications, documenting performance or ac-curacy data, alarm functions, power supply and also envi-ronmental data if the equipment is not type approved.

b) Complete operating instructions or "quick referenceguide".

c) Functional description.

d) Drawings or pictures showing displays and operating con-trols.

107 Description of functions, operation and alarm condi-tions, including system diagrams shall be submitted for inte-grated navigation systems, if installed. The documentation

shall include a worksheet giving an overview of failure modesand effect analysis (FMEA) as specified in 111 if the system isconfigured for controlling the ship's course or speed (e.g. to beinterfaced to a heading control or track control system or pro-pulsion control system).

108 Documentation shall be submitted to verify compliancewith the requirements for the alarm management systems, seeSec.6 I. The documentation shall include flow diagram for thetotal system configuration and descriptions of the watch mon-itoring and alarm transfer system.

109 The following drawings and descriptions related to theelectric power supply for bridge equipment and systems shallbe submitted:

a) Electrical diagrams, showing the sources and distributionof electric power supply identifying navigational equip-ment connected to uninterruptible power supply (UPS) orbattery and emergency power supplies.

b) Specifications for UPS units and batteries.


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DET NORSKE VERITAS

110 When a grounding avoidance system as required by theclass notation W1 is to be installed, the documentation to besubmitted shall include:

a) System design philosophy indicating safety features, manand machine interface considerations and system reliabil-ity.

b) Functional description including failure modes.

c) List of the equipment included in the configuration.

d) User interface description.

e) System block diagram.

f) Description of functions covered by software, identifyingthe versions applicable for the system to be installed.

g) Power supply arrangement.

h) Cable routing layout drawing.

i) Data sheets with environmental specifications for equip-ment not type approved.

j) Test program for application software at manufacturer, see114.

k) Test program for on board tests (sea trials).

Guidance note:

Items a, b, c, d and e may be edited as a document serving as basisfor the FMEA worksheet required in 111.


111 The consequences of failures in relation to the functionalobjectives of the grounding avoidance system shall be docu-mented by a failure mode and effect analysis (FMEA) work-sheet.

The FMEA shall refer to a block diagram in a narrative formatto enable the failure effects to be understood. The block dia-gram shall illustrate the interrelationship and functional inter-

dependence

of

the

system

elements.The FMEA worksheet shall comprise the following items:

the individual equipment name or number and function failure modes and failure cause of each individual equip-

ment the local effect and end effect (system function) failure detection and alarm condition (locally and main

system) system related corrective measures with indication of sys-

tem status second mode of operations (if applicable).

The worksheet shall also include cells for classification of theseverity of the end effect by indicating minor, major or hazard-

ous,

but

does

not

necessarily

have

to

be

filled

in

by

the

suppli-er. (Basis for evaluation of continued system operations,second mode of operations and redundancy).

Guidance note:

Example of a FMEA analysis worksheet matrix that covers theitems specified above (and guidance for the use of FMEA) can befound in IEC 60812.


112 A test program in compliance with the requirements foron-board testing given in Sec.10, relevant for equipment re-quired in Sec.4, shall be submitted for approval.

113 For integrated systems documented by FMEA, a FMEAtest programme drawn up to prove the conclusions of FMEA

by on board tests, and by on shore tests by simulation whenneeded, shall be submitted for approval.

The test programme shall be a self-contained document in re-port format with full description of the system, including theblock diagram and FMEA worksheet, without any need to re-

fer to other plans or documents. The programme should in-clude tests of relevant failure modes of each element of thesystem and enable observations to be noted about:

failure type failure effect failure detection or alarm condition system status, including second mode of operation.

Appropriate space shall be given for remarks and summaryconclusions.

114 Class notation W1

A test program for manoeuvring trials shall be submitted.

115 Class notation W1

A manoeuvring booklet containing the methods and results ofmanoeuvring trials shall be submitted for documenting the ma-noeuvring characteristics of the ship.

116 Suffix Q

The following documentation shall be submitted by the shipowner:

a) Bridge procedures for normal, irregular and abnormal op-erating conditions.

b) Copy of the qualification assurance system, including pro-cedures for on board certification of competence.

F. Documentation for Information

F 100 Class notation W1-OC and W1

101 Operational and technical manuals for the equipmentserving primary bridge functions shall be submitted for infor-mation.

102 Drawings showing location of sensors and other equip-ment not located on the bridge, if related to primary bridgefunctions (e.g. transponders, internal communication equip-ment, etc.) and the antenna arrangement for satellite communi-cation systems, radars, VHF equipment and other antennaarrangements, shall be submitted for information.

103 A general arrangement drawing showing the bridge con-figuration and the location on the ship, superstructures andfunnel(s) shall be submitted for information.

G. Functional Tests

G

100 Class

notation W1-OC

and W1

101 Tests, which give evidence of the satisfactory operationof instruments and integrated navigation systems in accord-ance with the rules, shall be carried out. Failure modes shall betested as realistically as possible. The tests shall be based ontest programmes approved by the Society, including FMEAworksheets, when applicable, see E113.

102 Approval tests of an integrated navigation system, if in-stalled, shall be conducted in accordance with Pt.4 Ch.9 Sec.1D. This includes software module testing and integration test-ing at manufacturers work.

103 Tests in accordance with an approved test program togive evidence of safe performance of integrated navigationsystems controlling course or speed, if installed, shall be car-

ried out at the sea trials.104 Functional testing of the grounding avoidance system(GAS) required for the class notation W1, shall be carried outat sea. Tests of alarm functions and system failure modescaused by malfunction of each of the individual equipment


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DET NORSKE VERITAS

sensors being part of the integrated system shall also be includ-ed, but may be carried out in port prior to sea trials.

105 Tests required to establish information on the ship's ma-noeuvring characteristics as specified in Sec.8 shall be carriedout.


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DET NORSKE VERITAS

SECTION 2DESIGN OF WORKPLACE

A. General

A 100 Scope101 This section specifies the requirements for workstationarrangements and individual workstations, their configuration,location of equipment and the minimum field of vision re-quired to be obtained from each of the workstations. The vari-ous sub-sections comprise both the basic requirements for W1-OC and the additional requirements that are specific for W1.

A 200 Application

201 Ships requesting class notation W1-OC shall complywith the rules in A to E.

202 Ships requesting class notation W1 shall comply withthe basic rules in A to E and the requirements specifically ad-

dressing W1

in

these

sub-sections.

An

overview

of

the

require-ments specific for W1 is given in F.

B. Bridge and Workstation Arrangement

B 100 General requirements

101 The bridge and workstation arrangement shall be basedon relevant functional requirements and designed in accord-ance with established principles of ergonomics for safe and ef-ficient operations, enabling the navigator to perceive allrelevant information and execute pertinent actions with a min-imum workload.

102

The

safe

control

and

command

of

the

ship

while

underway shall be allocated to a certain area of the wheelhousewhere only instruments, equipment and controls necessary forthe performance of primary bridge functions shall be located.

103 From the area allocated safe control and command of theship while under way, the navigator shall have easy access toadditional information for monitoring the safety state of theship.

104 The individual workstations allocated primary bridgefunctions shall be designed for easy control by one person andlocated to allow close co-operation between the various work-stations when manned for individual operations, as well as pro-vide sufficient room for unobstructed passage betweendifferent workstation areas.

Guidance note:

The workstations for primary bridge functions, except for dock-ing operations, should be located within an area not more than 10m wide.


105 Workstations for the safe and efficient performance ofprimary bridge functions under normal, irregular and abnormaloperating conditions in the various phases of the voyage at seafrom port to port shall be provided. Such workstations shall in-clude:

workstation for navigation

workstation for traffic surveillance and manoeuvring

workstations for manual steering workstation for safety operations workstations for docking operations workstations for conning workstation for re-planning the route.

106 A workstation for planning the intended voyage prior todeparture shall be provided, suitably equipped to plan and to

check

the

courses

and

turns

laid

down

before

the

voyage

com-mences.

Guidance note:

The workstation may be combined with another workstation notin use during port stays, provided it is suitably equipped for thepurpose.


107 Workstations for additional functions may be located onthe bridge provided the performance of such functions does notinterfere with the tasks of maintaining safe control of the ship.Workstations for additional functions may include worksta-tions for:

extended

communication

functions monitoring and control of ballasting and cargo operations extended monitoring of machinery remote control of accommodation ladder, hatches and side

ports miscellaneous.

108 The various workstations shall provide the field of vi-sion specified in E200 and be equipped for the safe perform-ance of the relevant tasks in accordance with the requirementsin this section.

109 Under all operating conditions, it shall be possible forpersons at a workstation to communicate with persons at otherworkstations of relevance for the function to be performed.

110 Where workstations for different functions are posi-tioned far apart, and on open bridge wings, talk back facilitiesshall be provided so that unhampered communication can beachieved. All order or action communication systems shall betwo-way.

B 200 Passageways and clear deckhead height

201 There shall be a clear route across the wheelhouse frombridge wing to bridge wing for two persons to pass each other.The width of the passageway shall be 1200 mm and not lessthan 700 mm at any single point of obstruction.

202 There shall be no obstructions between the points of en-try to the bridge from lower decks and the clear route referredto in 201. This passageway shall be at least 700 mm wide.

203 The distance between separate workstation areas shallbe sufficient to allow unobstructed passage for persons notworking at the stations. The width of such passageways shallnot be less than 700 mm including persons sitting or standingat their workstations.

204 The distance from the bridge front bulkhead, or fromany console and installation placed against the front bulkheadto any console or installation placed away from the bridgefront, shall be sufficient for one person to pass a stationary per-son. The width of this passageway shall not be less than 800mm.

205 The clear deckhead height in the wheelhouse shall takeinto account the installation of deckhead panels and instru-

ments

as

well

as

the

height

of

door

openings

required

for

easyentrance to the wheelhouse. The following clear heights forunobstructed passage shall be provided:

a) The lower edge of deck head-mounted equipment in openareas and passageways, as well as the upper edge of door


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DET NORSKE VERITAS

openings to bridge wings and other open deck areas shallbe at least 2100 mm above the deck.

b) The lower edge of entrances and doors to the wheelhousefrom adjacent passageways should not be less than 2000mm.

206 It shall be possible to secure bridge wing doors in theopen position, and it shall be possible to open doors with onehand. Ships with fully enclosed bridge wings shall at least haveone door, providing direct access to the adjacent area outsidethe wheelhouse.

B 300 Console configuration

301 The console configuration shall enable the navigator touse all instruments and controls necessary for navigation andtraffic surveillance and manoeuvring, both in a standing and asitting position.

Guidance note:

In principle, consoles should be divided into two separate areas:one for the display of information and one for the equipment nec-essary for taking action on the information. The information areashould be located in the upper (vertical) part of the console and

the controls in the lower (horizontal) part, see Fig. 3. See alsoSec.7.


302 The consoles forming the workstation for navigation andtraffic surveillance and manoeuvring shall endeavour not toobstruct the view over the lower edge of the windows seenfrom a sitting position at the consoles (eye height 1400 mm).In order not to obstruct the line of sight from a sitting positionof 350 mm behind a console of average depth, giving a totalhorizontal distance of 1500 mm between the operator and thesteel bulkhead, the height of console shall not exceed 1200mm. See Fig.7.

Guidance note:

A standard console height of 1200 mm is accepted even if the topof the console should interfere with the line of sight from a sittingeye height of 1400 mm provided the line of sight over the loweredge of the window can be maintained by adjusting the height ofthe chair 100 mm.


303 The height of consoles forming a workstation for radiocommunication or other additional tasks that are to be used bythe officer shall not obstruct the field of vision required main-taining a proper lookout from a sitting position at the console.The console height shall not exceed 1300 mm and be at least100 mm lower than the eye height in the sitting operating po-sition at the console, e.g. 1200 mm if the maximum height ofthe chair seat to be used is 550 mm above the deck surface.

304 The height of tabletops for chart consoles shall accom-modate chart work from a standing position. The height of thetabletop above the bridge deck surface shall be:

800 mm and not less than 750 mm to accommodate chartwork at the front chart console

850 mm and not less than 800 mm to accommodate chartwork at a route planning console.

305 The front chart console shall be large enough to accom-modate all nautical chart sizes in common use internationally.The effective area of the desktop shall be at least 1200 mm x750 mm.

306 The front chart console shall provide sufficient storageof charts for at least 8 hours of navigation and enable storageof tools for chart work. The console shall include a drawer withdimensions at least 800 mm x 700 mm x 70 mm. Appropriatelighting of the chart shall not cause glare in bridge windows.See Fig.1.

Fig. 1Lighting of front chart table

307 A route planning console for paper charts shall have an

effective

area

of

at

least

1600

mm

x

800

mm

for

chart

work.

B 400 Chairs

401 If chairs are installed at the workstation for navigationand traffic surveillance and manoeuvring, it shall be easy to ad-just the vertical position of the chairs to suit an eye height of1400 mm. The vertical adjustment of the seat should rangefrom 600 to 800 mm above the deck surface.

402 It shall be possible to move the chairs in fore and aft di-rection for easy reach of the equipment to be used and to movethe chairs away from the consoles to achieve good workingconditions from a standing position.

403 It shall be easy to enter and leave the chairs in any posi-tion. If the chair includes armrests, it shall be possible to foldthem away.

404 Deck rails used to support horizontal movements of thechairs shall be installed flush with the deck surface or in a waythat prevents tripping of personnel.

C. Workstations for Primary Bridge Functions

C 100 Scope

101 This sub-section regulates the design solutions of work-stations and identifies functions to be performed at the individ-ual workstations, as a basis for listing the equipment to be

installed.C 200 General requirements

201 The design and location of workstations shall enable theship to be navigated and manoeuvred safely and efficiently byone navigator in ocean areas and coastal waters under normaloperating conditions, as well as by two navigators in close co-operation when the workload exceeds the capacity of one per-son, and when under pilotage.

202 Bridge equipment shall be located in workstations ena-bling the navigator to take into consideration pertinent infor-mation and execute actions in accordance with the functions tobe performed.

C 300 Workstations for navigation and traffic surveil-lance and manoeuvring

301 Design of workstations

The workstations for navigation and traffic surveillance andmanoeuvring shall be arranged to enable two navigators to car-


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DET NORSKE VERITAS

ry out their tasks, each at their workstation, in close co-opera-tion.

302 The instruments pertinent to these stations shall be locat-ed sufficiently close together to enable a single navigator tocarry out all functions and retrieve all necessary informationfrom one working location by having easy access between theworkstations.

303

If

easy

access

is

hampered

by

a

console

protruding

morethan 400 mm in between the workstation for navigation and theworkstation for traffic surveillance and manoeuvring, theworkstations will be regarded as separate stations and one ofthe workstations shall be fully equipped to enable both the nav-igation and the traffic surveillance and manoeuvring functionsto be efficiently carried out by one navigator.

Guidance note:

a) If the workstation for navigation is intended to serve bothnavigation and traffic surveillance and manoeuvring func-tions, then essential equipment for traffic surveillance andmanoeuvring, such as the ARPA system and a means forcontrolling speed and course, should be within reach fromthe workstation for navigation.

b) If the workstation for traffic surveillance and manoeuvringis intended to serve both traffic surveillance and manoeu-vring and navigation functions, then essential equipment fornavigation, such as a chart table (if ECDIS is not installed)and position-fixing systems, should be within reach from theworkstation for traffic surveillance and manoeuvring.

See 306, 307 and 308.

An acceptable solution, instead of the duplication of requiredequipment, may be to install the essential equipment, indicatedunder a), within reach from the working position at both worksta-tions.

See Fig.2 (long centre console).

Description

1. Steering - autopilot2. Propulsion, emergency stop3. Thruster, if provided4. Steering - override control4a. Steering - mode selector5. Communication - external6. Communication - internal7. Available space

Fig. 2

Example of locaiton of main equipment in compliance with 303and Guidance note a)


304 Design of workstations - W1

The workstation for navigation and traffic surveillance andmanoeuvring shall be designed for one-man operation only,and the separate workstation required for navigation shall beinstalled sufficiently close by to serve as a back up for per-formance of navigation functions if ECDIS malfunction occursand to allow good co-operation between two navigators each attheir workstation.

Guidance note:

If the chart arrangement at the separate workstation for naviga-tion meets the requirements for serving as part of the groundingavoidance system and the equipment for control of heading andpropulsion is located within reach from the working position, thisworkstation is regarded a fully redundant workstation for naviga-tion and traffic surveillance and manoeuvring.


305 Tasks to be performed at the workstation for navigation

The workstation for navigation shall enable the following tasksto be performed:

determine and plot the ship's position, course, track and

speed effect internal and external communication related to nav-

igation monitor time, course, speed and track, rudder angle, pro-

peller revolutions and propeller pitch (when applicable) adjustment of pre-planned route during the voyage.

306 Equipment to be installed

The following instruments and equipment that are to be oper-ated by the navigator at the workstation for navigation, andconsidered essential for safe operations, shall be within reachfrom a standing position at the workstation:

navigation radar display and controls chart table and ECDIS back-up arrangement when provid-

ed relevant position-fixing systems (GPS, GLONASS or Lo-

ran-C) VHF unit whistle push button device for acknowledging watch monitoring warnings or

alarms central alarm panel distance indicator.

Guidance note:

Ships solely using ECDIS as the official chart system and are notrequired to carry any paper navigational charts, may not install afront chart table.


307 Information to be provided

Instruments, indicators and displays providing informationconsidered essential for operations at the workstation for nav-igation shall be easily readable from the working position atthe workstation. The equipment includes:

gyro repeater rudder angle indicator depth indicator clock propeller revolutions indicator pitch indicator, when provided speed indicator

rate-of-turn indicator.

308 Means to be easily accessible

Means to be used at intervals for securing safe course andspeed in relation to other ships and safety of bridge operation


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DET NORSKE VERITAS

shall be easily accessible from the workstation for navigation.

The means include:

instruments and equipment installed at the workstation for

traffic surveillance and manoeuvring

internal communication equipment

window wipers and wash controls for the windows within

the

required

field

of

vision workstation light controls

depth recording device.

309 Tasks to be performed at the workstation for traffic sur-

veillance

The workstation for traffic surveillance and manoeuvring shall

enable the following tasks to be performed:

monitor the traffic by sight and hearing as well as by avail-

able means

analyse the traffic situation

decide on collision avoidance manoeuvres

alter course change speed

carry out a change of operational steering mode

effect internal and external communication related to ma-

noeuvring

operate docking aid systems

monitor time, course, speed, track, propeller revolutions,

thrust indicator, if the ship is equipped with thrusters, pitch

indicator, if the ship is equipped with pitch propeller, rud-

der order, rudder angle and rate of turn

monitor all alarm conditions on the bridge.

310 Equipment to be installed

Instruments and equipment that are to be operated by the nav-

igator at the workstation for traffic surveillance and manoeu-

vring, and considered essential for safe and efficient

performance of his tasks, shall be within reach from a sitting

position at the workstation, priority given to location of con-

trols for ARPA, course and speed.

Guidance note:

The following instruments and equipment should be installed

within reach from a sitting position:

- radar display and controls

- automatic radar plotting aid (ARPA)

- electronic chart system or ECDIS, when provided

- propulsion

control- heading control or track control system, as required

- manual steering with tiller override control

- steering mode selector switch

- VHF unit

- whistle push button

- internal communication equipment

- emergency stop for propulsion machinery

- emergency stop for thruster(s), when provided

- device for acknowledging watch monitoring warnings or

alarms

- central alarm panel.

The following equipment should be installed within reach from a

standing position at the centre console where also controls for

propulsion and steering can be operated:

- Thruster control(s), when provided

- Joystick control, when provided.

See Fig.3.

Description

1. Steering - autopilot2. Propulsion, emergency stop3. Thruster, if provided4. Steering - override control and mode selector5. Communication - external

6. Communication - internal7. Available space

Fig. 3Example of priority location of equipment, which is to be withinreach while seated, listed in 310


311 Information to be provided

Instruments, indicators and displays providing informationconsidered essential for the safe and efficient performance oftasks at the workstation for traffic surveillance and manoeu-vring shall be easily readable, and audible when relevant, fromthe working position at the workstation:

propeller revolution indicator thrust indicator, when provided pitch indicator, when provided speed indicator wind direction and speed indicator, when provided rudder angle indicator rudder order indicator, if the steering system is a follow-up

system rate-of-turn indicator gyro repeater depth indicator clock

conning

information

display,

when

provided alarm indicators, colours means for reception of external sound.

312 Means to be easily accessible

Means to be used at intervals for securing safe course andspeed in the waters to be navigated and for safety of bridge op-eration shall be easily accessible from the workstation for traf-fic surveillance and manoeuvring. The means include:

instruments and equipment installed at the navigationworkstation

engine alarm panel window wiper and wash controls for the windows within

the required field of vision alarm panel for additional functions, such as fire, emer-

gency, cargo, etc. searchlight controls, when provided dimmer controls for lights to be used at the workstation controls for the sound reception system.


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DET NORSKE VERITAS

313 Navigational tasks at the workstation for traffic surveil-lance and manoeuvring - W1

The workstation designed for one-man operation only, shallenable performance of the tasks specified in 306 and the fol-lowing tasks related to navigation:

monitor the ship's performance in relation to the wate

nautical safety

Documents