Regulation 22

Main and auxiliary machinery essential for the propulsion and safety of the ship shall be provided with effective means of control. (2) Where main or auxiliary machinery including pressure vessels or any part of such machinery are subject to internal pressure and may be subject to dangerous overpressure, means shall be provided, where applicable, which will protect against such excessive pressure. (3) All gearing, shaft and coupling used for transmission of power to machinery essential for the propulsion and safety of the vessel or the safety of persons on board shall be so designed and constructed that it will withstand the maximum working stresses to which it may be subjected in all service conditions. Due consideration shall be given to the type of engines by which it is driven or of which it forms a part. (4) Main propulsion machinery and where applicable, auxiliary machinery shall be provided with automatic alarm arrangements in the case of failures, such as lubricating oil supply failure, which could lead rapidly to damage, complete breakdown or explosion.