Supervise and coordinate activities of crew engaged in operating and maintaining engines, boilers, deck machinery, and electrical, sanitary, and refrigeration equipment aboard ship.

• Engineer

• Act as a liaison between a ship's captain and shore personnel to ensure that schedules and budgets are maintained and that the ship is operated safely and efficiently.
• Clean engine parts, and keep engine rooms clean.
• Fabricate engine replacement parts such as valves, stay rods, and bolts, using metalworking machinery.
• Install engine controls, propeller shafts, and propellers.
• Maintain and repair engines, electric motors, pumps, winches and other mechanical and electrical equipment, or assist other crew members with maintenance and repair duties.
• Maintain complete records of engineering department activities, including machine operations.
• Maintain electrical power, heating, ventilation, refrigeration, water, and sewerage systems.
• Monitor and test operations of engines and other equipment so that malfunctions and their causes can be identified.
• Monitor engine, machinery, and equipment indicators when vessels are underway, and report abnormalities to appropriate shipboard staff.
• Monitor the availability, use, and condition of lifesaving equipment and pollution preventatives, in order to ensure that international regulations are followed.
• Operate and maintain off-loading liquid pumps and valves.
• Order and receive engine room's stores such as oil and spare parts; maintain inventories and record usage of supplies.
• Perform and participate in emergency drills as required.
• Perform general marine vessel maintenance and repair work such as repairing leaks, finishing interiors, refueling, and maintaining decks.
• Record orders for changes in ship speed and direction, and note gauge readings and test data, such as revolutions per minute and voltage output, in engineering logs and bellbooks.
• Start engines to propel ships, and regulate engines and power transmissions to control speeds of ships, according to directions from captains or bridge computers.
• Supervise the activities of marine engine technicians engaged in the maintenance and repair of mechanical and electrical marine vessels, and inspect their work to ensure that it is performed properly.

• assemble, dismantle, or reassemble equipment or machinery
• direct and coordinate activities of workers or staff
• erect machinery in marine or maritime setting
• inspect machinery or equipment to determine adjustments or repairs needed
• maintain or repair ship/boat engine, machinery or equipment
• maintain records, reports, or files
• monitor production machinery/equipment operation to detect problems
• monitor worker performance
• operate auxiliary power plant equipment
• operate lathes
• operate power generation equipment
• oversee work progress to verify safety or conformance to standards
• perform hydraulic plumbing
• perform safety inspections in transportation setting
• read blueprints
• read technical drawings
• read work order, instructions, formulas, or processing charts
• repair commercial transportation equipment
• select ship repair method
• set up and operate variety of machine tools
• stand watch on vessel
• understand technical operating, service or repair manuals
• use acetylene welding/cutting torch
• use combination welding procedures
• use engine diagnostic equipment
• use hand or power tools
• use pneumatic tools
• use precision measuring devices in mechanical repair work
• use two-way radio or mobile phone
• use weighing or measuring devices in transportation