Start engines to propel ships, and regulate engines and power transmissions to control speeds of ships, according to directions from captains or bridge computers.

Maintain or repair engines, electric motors, pumps, winches, or other mechanical or electrical equipment, or assist other crew members with maintenance or repair duties.

Perform or participate in emergency drills, as required.

Monitor engine, machinery, or equipment indicators when vessels are underway, and report abnormalities to appropriate shipboard staff.

Maintain complete records of engineering department activities, including machine operations.

Perform general marine vessel maintenance or repair work, such as repairing leaks, finishing interiors, refueling, or maintaining decks.

Maintain electrical power, heating, ventilation, refrigeration, water, or sewerage systems.

Monitor and test operations of engines or other equipment so that malfunctions and their causes can be identified.

Monitor the availability, use, or condition of lifesaving equipment or pollution preventatives to ensure that international regulations are followed.

Install engine controls, propeller shafts, or propellers.