Clasification Society Rulefinder 2020 - Version 9.33 - Fix
Statutory Documents - MCA Publications - LY2 - The Large Commercial Yacht Code - 18 Navigational Equipment and Visibility from Wheelhouse - 18.1 Navigational Equipment

18.1 Navigational Equipment

  18.1.1 A vessel should be fitted with the following:

  • .1 A properly adjusted standard magnetic compass or other means, independent of any power supply, to determine the ship's heading.

  • .2 In a steel vessel, it should be possible to correct the compass for co-efficients B, C and D, and heeling error.

  • .3 The magnetic compass or repeater should be so positioned as to be clearly readable by the helmsman at the main steering position. It should also be provided with an electric light, the electric power supply of which should be of the twin wire type.

  18.1.2 A vessel should be fitted with, the following additional equipment:

  • .1 an echo sounder;

  • .2 a receiver for a global navigation satellite system or a terrestrial radio-navigation system, or other means suitable for use at all times throughout the intended voyage to establish and update the ship's position by automatic means;

  • .3 a distance measuring log;

  • .4 a gyro compass or spare magnetic compass bowl;

  • .5 a rudder angle indicator; and

  • .6 a 9 GHz radar.

  18.1.3 For vessels of less than 300GT the equipment specified in 18.1.1 and 18.1.2 need not be of an approved type.

  18.1.4 Means should be provided for taking bearings as near as practicable over an arc of the horizon of 360°. This requirement may be met by the fitting of a pelorus compass, or, on a vessel other than a steel vessel, with a hand bearing compass.

  18.1.5 For vessels under 300GT the requirements of 18.1.2.4 may be met by the use of a fluxgate compass, provided that a suitable back up power supply is available to power the compass in the event of failure of the main electrical supply. Where such a compass incorporates a capability to measure magnetic deviation by undertaking a calibration routine, and where the deviation figures are recorded within the device, a deviation card is not required.

  18.1.6 Attention should be paid to magnetic effects on magnetic compasses, including fluxgate compasses, when operating in Polar Regions. (i.e. north of 70° N, or south of 70° S).

  18.1.7 All vessels of 300GT and over shall be fitted with an approved automatic identification system (AIS) in accordance with SOLAS Chapter V, no later than 31st December 2004. The AIS shall:

  • .1 provide automatically to appropriately equipped shore stations, other ships and aircraft, information including the ships identity type, position, course, speed, navigational status and other safety related information;

  • .2 receive automatically such info from similarly fitted ships

  • .3 monitor and track ships; and

  • .4 exchange data with shore-based facilities.

Parent topic: 18 Navigational Equipment and Visibility from Wheelhouse
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