Regulation 47

in boiler air supply casings and exhausts (uptakes); and (ii) in scavenging air belts of propulsion machinery, unless the Director considers this to be unnecessary in a particular case. ( b ) Internal combustion engines of 2,250 kW and above or having cylinders of more than 300 mm bore shall be provided with crankcase oil mist detectors or engine bearing temperature monitors or equivalent devices.