Section 15 Navigation and manoeuvring systems

15.1.1 The requirements for steering gear are given in Pt 6, Ch 2, 15.1 Steering gear of the Rules for Ships, which are to be complied with. Additions or amendments to these requirements are given in the following paragraph(s) of this sub-Section.

15.1.2 These requirements are to be read in conjunction with those in Pt 5, Ch 19 Steering Gear.

15.1.3 Where it is proposed that a dedicated emergency source of electrical power and its associated transitional source of power will not be provided, see also Pt 6, Ch 2, 3.7 Alternative sources of emergency electrical power 3.7.9.

15.2.1 Where azimuth or rotatable thruster units, used as the sole means of steering, are electrically driven, the requirements of Pt 5, Ch 20, 5 Electrical equipment of the Rules for Ships are to be complied with.

15.3.1 For units having a DP class notation the requirements of Pt 3, Ch 9 Dynamic Positioning Systems are to be complied with.

15.4.1 Where a thruster system is fitted solely for the purpose of manoeuvring and is electrically driven, the requirements of Pt 6, Ch 2, 15.4 Thruster systems for manoeuvring of the Rules for Ships are to be complied with.

15.5.1 Where transverse units are remotely controlled, the requirements of Pt 6, Ch 2, 15.5 Transverse thrust units of the Rules for Ships are to be complied with.

15.6.1 For units having a thruster-assisted positional mooring system the requirements of Pt 3, Ch 10 Positional Mooring Systems are to be complied with.

15.7.1 The requirements for navigation lights are given in IEC 61892-5:2010, Mobile and fixed offshore units – Electrical installations – Part 5: Mobile units, Section 7 and Pt 6, Ch 2, 15.6 Navigation lights of the Rules for Ships, which are to be complied with where applicable. Additions or amendments to these requirements are given in the following paragraph(s) of this sub-Section.

15.7.2 Navigation lights are to be connected separately to a distribution board reserved for this purpose only, and accessible to the Officer of the Watch. The distribution board is to be connected directly or through transformers to the emergency source of electrical power in compliance with Pt 6, Ch 2, 3.2 Emergency source of electrical power 3.2.4 and Pt 6, Ch 2, 3.2 Emergency source of electrical power 3.2.5.(a). See also Pt 6, Ch 2, 3.7 Alternative sources of emergency electrical power 3.7.9. An alarm is to be activated in the event of failure of a power supply from the distribution board. Disconnectable units are permitted for this purpose, i.e. for when the unit is not stationary and engaged in operations.

15.7.3 Signalling lights or sound signals required for marking offshore structures are to be fed from an emergency source of electrical power, see Pt 6, Ch 2, 3.2 Emergency source of electrical power 3.2.4.(e).

15.7.4 Where it is proposed that a dedicated emergency source of electrical power and its associated transitional source of power will not be provided, see also Pt 6, Ch 2, 3.7 Alternative sources of emergency electrical power 3.7.9.

15.8.1 Navigational aids as required by SOLAS are to be fed from the emergency source of electrical power, see also Pt 6, Ch 2, 3.4 Emergency source of electrical power in cargo ships 3.4.1 of the Rules for Ships, which are to be complied with. Where it is proposed that a dedicated emergency source of electrical power and its associated transitional source of power will not be provided, see also Pt 6, Ch 2, 3.7 Alternative sources of emergency electrical power 3.7.9. Additions or amendments to these requirements are given in the following paragraph(s) of this sub-Section.

15.8.2 When a unit is stationary and engaged in operations, navigation aids (lanterns and sound signals) shall be provided in accordance with the International Association of Marine Aids to Navigation and Lighthouse Authorities (IALA) requirements and the requirements of the coastal state in whose territorial sea or on whose continental shelf the unit is operating.

15.9.1 Helideck perimeter lighting, helideck floodlights, aircraft warning lights, status (wave-off) lights and unit identification signage are to comply with UK Standard CAP 437, Standards for Offshore Helicopter Landing Areas or the requirements of the coastal state in whose territorial sea or on whose continental shelf the unit is operating.

15.9.2 Helideck perimeter lighting, helideck floodlights, aircraft warning lights and status lights are to be supplied by a UPS backed supply. The UPS autonomy is to be agreed with LR and the unit Owner and be in accordance with the requirements of any relevant Statutory Regulations of the National Administrations in the country of registration and area of operation.

15.9.3 Signalling lights or sound signals required for marking offshore structures are to be fed from an emergency source of electrical power, see Pt 6, Ch 2, 3.2 Emergency source of electrical power 3.2.4.

15.9.4 Where it is proposed that a dedicated emergency source of electrical power and its associated transitional source of power will not be provided, see also Pt 6, Ch 2, 3.7 Alternative sources of emergency electrical power 3.7.9.