Ship’s oiler/greaser lubricates bearings and moving parts of engines and other mechanical equipment on vessels afloat. He/she makes regular rounds of machinery, checks gauges and thermometers and adjusts pressure and flow of lubricants to working parts of machinery. He/she also pours oil and applies grease with grease-guns at specified points of machinery not automatically lubricated. He/she assists engineers and engine-room mechanics in overhauling and repairing engines and other shipboard machinery.