Division .1 New ships of class C and D in which the electrical power is the only power for maintaining the auxiliary services essential for the safety of the ship, and new and existing ships of class B in which the electrical power is the only power for maintaining the auxiliary services essential for the safety and the propulsion of the ship, shall be provided with two or more main generating sets of such power that the aforesaid services can be operated when any one sets is out of service.F1
United Kingdom
In new class C and D ships of less than 24 metres in length, one of the main generating sets may be main propulsion engine driven, provided it is of such power that the aforesaid services can be operated when any one other set is out of service.