Section 5 Propulsion redundancy
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Inland Waterways Ships, July 2022 - Part 5 Main and Auxiliary Machinery - Chapter 1 General Requirements for the Design and Construction of Machinery - Section 5 Propulsion redundancy

Section 5 Propulsion redundancy

Parent topic: Chapter 1 General Requirements for the Design and Construction of Machinery

5.1 Shaft system and steerable bow thruster

5.1.1 Ships having a length exceeding 110 m shall be fitted with:

  • two independent shaft installations, each of the same power and a bow thrusters installation controlled from within the wheelhouse, or
  • a single shaft installation together with an independent steerable bow thrust installation controllable from within the wheelhouse capable of propelling the ship by own means, also in the unloaded condition by failure of the main propulsion installation. Plans of the independent steerable bow thrust installations are to be submitted for consideration, see Pt 5, Ch 17 Steerable Bow Thrusters.

5.1.2 Passenger ships having a loaded waterline length exceeding 25 m shall be fitted with:

  • A second independent propulsion system capable of propelling the ship in case of failure of the main propulsion system.
  • The second independent system is to be installed in a separate machinery space, if both machinery spaces have a common boundary it is to be insulated to A60 Standard.

5.1.3 Combustion air for the main engines is not to be extracted from machinery spaces that are protected by permanently installed fire-fighting systems. This is not applicable when two independent completely separate machinery spaces are provided or if next to the main engine room a separate engine room has been provided with a bow thruster driven by its own source of power and capable of propelling the ship in the event of fire in the main machinery space.

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