Also oil mist detector if certain thresholds are met:
"SOLAS requirement for oil mist detectors – Engines of 2,250 kW and above or having cylinders of more than 300mm bore shall be provided with crankcase oil mist detectors or engine bearing temperature monitors or equivalent devices.” Chapter II-I, Regulation 47.2 (1981).
As per IACS M10.8 Oil mist detection arrangements (or engine bearing temperature monitors or equivalent devices) are required:
For alarm and slow down purposes for low-speed diesel engines of 2250 kW and above or having cylinders of more than 300 mm borefor alarm and automatic shutoff purposes for medium- and high-speed diesel engines of 2250 kW and above or having cylinders of more than 300 mm bore."