Engineering and Hull Ratings
| Insignia | General rating | Abbreviation | Service rating | Abbreviation |
|---|---|---|---|---|
| Damage Controlman | DC | |||
| Damage Controlmen perform the work necessary for damage control, ship stability, fire-fighting. They also prepare defenses against chemical, biological and radiological (CBR) warfare attacks. They instruct personnel in damage control and CBR defense and repair damage-control equipment and systems. | ||||
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Electrician's Mate | EM | ||
| Electrician's Mates are responsible for the operation and repair of a ship's or station's electrical power plant and electrical equipment. They also maintain and repair power and lighting circuits, distribution switchboards, generators, motors and other electrical equipment. Electrician's Mates are employed onboard nuclear powered ships to maintain the control subsystems in nuclear reactors. | ||||
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Engineman | EN | ||
| Enginemen are responsible for internal diesel and gasoline engines. They also maintain refrigeration, air-conditioning, distilling-plant engines and compressors. | ||||
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Gas Turbine System Technician | GS | (Electrical) (Mechanical) |
GSE GSM |
| Gas Turbine System Technician are responsible for all gas turbine engines. They maintain propulsion machinery, including gears, shafting and controllable pitch propellers, assigned auxiliary equipment propulsion control systems, electrical and electronic circuitry up to the printed circuit module, and alarm and warning circuitry. They handle administrative tasks related to gas turbine propulsion system operation and maintenance. | ||||
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Hull Maintenance Technician | HT | ||
| Hull Maintenance Technicians are responsible for maintaining ships' hulls, fittings, piping systems and machinery. They install and maintain all shipboard and shore based plumbing and piping systems. They look after a vessel's safety and survival equipment and perform many tasks related to damage control. | ||||
| Interior Communications Electrician | IC | |||
| Interior Communications Electricians operate and repair electronic devices used in the ship's interior communications systems, SITE TV systems, 1MC (public address system), electronic megaphones and other announcing equipment. They are responsible for the gyrocompass systems. | ||||
| Machinist's Mate | MM | (Nuclear) submarine (Weapons) submarine (Auxiliary) |
MMN MMW MMA |
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| Machinist's Mates are responsible for the continuous operation of the many engines, compressors, gears, refrigeration, and air-conditioning equipment along with other types of machinery onboard ships and shore installations. They are responsible for the ship's steam propulsion and auxiliary equipment and the outside (deck) machinery. Machinist's Mates are deployed onboard nuclear powered ships to maintain the machinery and piping in nuclear reactors. Some nuclear machinists mates (Engineering Laboratory Technicians) receive additional specialization in Health Physics and maintaining reactor chemistry. | ||||
| Machinery Repairman | MR | |||
| Machinery Repairmen are skilled machine tool operators. They make replacement parts and repair or overhaul a ship's engine auxiliary equipment, such as evaporators, air compressors and pumps. They repair deck equipment, including winches, hoists, condensers, and heat exchange devices. Shipboard Machinery Repairmen frequently operate main propulsion machinery, besides performing machine shop and repair duties. | ||||
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Navy Diver | ND | ||
| Navy Divers are responsible for a wide variety of tasks like underwater ship maintenance, construction, explosive ordnance disposal (EOD), and underwater rescue. They are assigned to Naval Special Warfare Units to provide diving technical expertise and supervisory support to all submersible operations. | ||||
Read more about this topic: List Of United States Navy Ratings
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