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

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 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. Perform general marine vessel maintenance and repair work such as repairing leaks, finishing interiors, refueling, and maintaining decks. 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. 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. Maintain complete records of engineering department activities, including machine operations. 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. 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.

Mechanical -- Knowledge of machines and tools, including their designs, uses, repair, and maintenance.

Operation and Control -- Controlling operations of equipment or systems. Operation Monitoring -- Watching gauges, dials, or other indicators to make sure a machine is working properly. Repairing -- Repairing machines or systems using the needed tools. Equipment Maintenance -- Performing routine maintenance on equipment and determining when and what kind of maintenance is needed. Writing -- Communicating effectively in writing as appropriate for the needs of the audience. Troubleshooting -- Determining causes of operating errors and deciding what to do about it. Coordination -- Adjusting actions in relation to others' actions. Speaking -- Talking to others to convey information effectively. Management of Personnel Resources -- Motivating, developing, and directing people as they work, identifying the best people for the job. Time Management -- Managing one's own time and the time of others.

Problem Sensitivity -- The ability to tell when something is wrong or is likely to go wrong. It does not involve solving the problem, only recognizing there is a problem. Control Precision -- The ability to quickly and repeatedly adjust the controls of a machine or a vehicle to exact positions. Oral Expression -- The ability to communicate information and ideas in speaking so others will understand. Written Comprehension -- The ability to read and understand information and ideas presented in writing.

Inspecting Equipment, Structures, or Material -- Inspecting equipment, structures, or materials to identify the cause of errors or other problems or defects. Controlling Machines and Processes -- Using either control mechanisms or direct physical activity to operate machines or processes (not including computers or vehicles). Monitor Processes, Materials, or Surroundings -- Monitoring and reviewing information from materials, events, or the environment, to detect or assess problems. Getting Information -- Observing, receiving, and otherwise obtaining information from all relevant sources. Coordinating the Work and Activities of Others -- Getting members of a group to work together to accomplish tasks. Making Decisions and Solving Problems -- Analyzing information and evaluating results to choose the best solution and solve problems. Repairing and Maintaining Mechanical Equipment -- Servicing, repairing, adjusting, and testing machines, devices, moving parts, and equipment that operate primarily on the basis of mechanical (not electronic) principles. Handling and Moving Objects -- Using hands and arms in handling, installing, positioning, and moving materials, and manipulating things. Performing General Physical Activities -- Performing physical activities that require considerable use of your arms and legs and moving your whole body, such as climbing, lifting, balancing, walking, stooping, and handling of materials. Identifying Objects, Actions, and Events -- Identifying information by categorizing, estimating, recognizing differences or similarities, and detecting changes in circumstances or events.