1 Where risk from overspeeding of machinery exists,
means shall be provided to ensure that the safe speed is not exceeded.
2 Where main or auxiliary machinery including
pressure vessels or any parts of such machinery are subject to internal
pressure and may be subject to dangerous overpressure, means shall
be provided where practicable to protect against such excessive pressure.
3 All gearing and every shaft and coupling used
for transmission of power to machinery essential for the propulsion
and safety of the ship or for the safety of persons on board shall
be so designed and constructed that they will withstand the maximum
working stresses to which they may be subjected in all service conditions,
and due consideration shall be given to the type of engines by which
they are driven or of which they form part.
4 Internal combustion engines of a cylinder diameter
of 200 mm or a crankcase volume of 0.6 m3 and above shall
be provided with crankcase explosion relief valves of a suitable type
with sufficient relief area. The relief valves shall be arranged or
provided with means to ensure that discharge from them is so directed
as to minimize the possibility of injury to personnel.
5 Main turbine propulsion machinery and, where
applicable, main internal combustion propulsion machinery and auxiliary
machinery shall be provided with automatic shutoff arrangements in
the case of failures such as lubricating oil supply failure which
could lead rapidly to complete breakdown, serious damage or explosion.
The Administration may permit provisions for overriding automatic
shutoff devices.