Section 1 General requirements

1.1.1 The requirements of this Chapter apply to ships where an optional class notation for optimizing environment on the bridge for navigational tasks, including periodic operation of the ship under the supervision of a single watchkeeper on the bridge and/or integrated bridge systems, is requested, and are additional to those applicable in other Parts of the Rules.

1.1.2 The requirements of this Chapter are based on the understanding that the International Regulations for Preventing Collisions at Sea and all other relevant Regulations relating to Radio Communications and Safety of Navigation required by Chapter IV - Radiocommunications and Chapter V - Safety of navigation respectively of SOLAS are complied with.

1.1.3 Requirements additional to those in this Chapter may be imposed by the National Authority with whom the ship is registered and/or by the Administration within whose territorial jurisdiction it is intended to operate.

1.1.4 The requirements of this Chapter are framed on the understanding that contingency plans for emergencies are specified and the conditions under which one man watch is permitted are clearly defined in an operations manual which is acceptable to the Administration with which the ship is registered.

1.1.5 In general, ships complying with the requirements of Pt 7, Ch 9, 1 General requirements to Pt 7, Ch 9, 4 Systems of this Chapter will be eligible for the notation NAV1.

1.1.6  Pt 7, Ch 9, 5 Integrated Bridge Navigation System – IBS notation of this Chapter states additional requirements which shall apply where the navigational functions are integrated. In general, ships complying with the requirements of Pt 7, Ch 9, 5 Integrated Bridge Navigation System – IBS notation will be eligible for the notation IBS, see Pt 1, Ch 2, 2.4 Class notations (machinery). In addition to the assessment of the navigational function integration, the assignment of the notation IBS requires that the layout of the bridge and the equipment located on the bridge is to the satisfaction of Clasifications Register (hereinafter referred to as LR), see Pt 7, Ch 9, 5.2 General requirements 5.2.1.

1.2.1 The following information and plans are to be submitted in triplicate:

• For programmable electronic systems, the plans required by Pt 6, Ch 1, 1.2 Documentation required for design review 1.2.6.
• Details of the intended area of operation of the ship.
• List of navigational equipment detailing manufacturer, and model and National Authority approval (where applicable).
• Functional block diagrams and descriptions of the navigational equipment, internal communications systems and watch safety system indicating their relationship to each other.
• Details of the electrical power supplies to the navigational equipment, internal communications systems, watch safety system, and clear view arrangements.
• A general arrangement of the ship showing the fields of vision from the bridge.
• A general arrangement of the bridge and wheelhouse showing the positions of consoles, panels, handrails, seating, windows and clear view arrangements.
• A profile view of the wheelhouse detailing the inclination of windows, heights of upper and lower edges of windows, and dimensions of consoles.
• Detailed arrangements of consoles and panels showing the layout of equipment.
• Test schedules which should include methods of testing and test facilities provided.
• A schedule of the electrical and electronic equipment referred to in Pt 7, Ch 9, 2.2 Environment 2.2.10 giving details of:

• equipment description;
• manufacturer;
• type and/or model; and
• evidence of electromagnetic compatibility.

1.3.1 The following definitions are applicable to these Rules:

1. Workstation:

   A position at which one or several tasks, constituting a particular activity, is carried out.

2. Navigation workstation:

   A workstation at which the navigator may carry out all tasks relevant for deciding, executing and maintaining course and speed in relation to waters and traffic. The instrumentation and controls at the navigation workstation should allow the navigator to:

   • analyse the traffic situation;
   • monitor position, course, track, speed, time, propeller revolutions and pitch, rudder angle, depth of water, rate of turn, and wind speed and direction;
   • alter course and speed;
   • effect internal and external communications;
   • give and receive sound signals;
   • control navigational lights;
   • monitor and acknowledge navigational alarms and warnings;
   • confirm his well-being and watch-keeping awareness; and
   • record navigational data.

3. Main steering position:

   That part of the navigation workstation where those controls and instrumentation relevant to controlling the ship's course are located.

4. Conning position:

   A place on the bridge which is used by navigators when commanding, manoeuvring and controlling a ship.

5. Voyage planning workstation: A workstation at which the navigator may carry out the following tasks without affecting the actual navigation of the vessel:

   • examine and update charts and other relevant documentation;
   • plan a voyage as a series of waypoints, courses, speeds and turns;
   • calculate an estimated time of arrival at various points on the voyage; and
   • determine and plot the ship's position.