B130:Machinist's Mate

Machinist's Mates (non-nuclear) operate, maintain, and repair (organizational and intermediate level) ship propulsion machinery, auxiliary equipment, and outside machinery, such as: steering engine, hoisting machinery, food preparation equipment, refrigeration and air conditioning equipment, windlasses, elevators, and laundry equipment; operate and maintain (organizational and intermediate level) marine boilers, pumps, forced draft blowers, and heat exchangers; perform tests, transfers, and inventory of lubricating oils, fuels, and water; maintain records and reports; and generate and stow industrial gases.

Is there a clearance required?: No

Is this a combat or support MOS?: Support

Military Duties:

The duties performed by Machinist's Mates include aligning piping systems for oil, water, air and steam, and controlling the operation of ship boilers and steam turbines used for ship propulsion and service systems. They control the operation of turbogenerators used to produce electrical power. MMs clean, adjust, test and perform other preventive maintenance on a ship's boilers, main engines, turbogenerators, and other auxiliary machinery including steering engines, elevators, winches, pumps and associated valves. They operate and maintain desalinization plants (distilling plants) to make fresh water from sea water, and maintain refrigeration plants, air conditioning systems and galley equipment. MMs repair and replace valves, pumps, heat exchangers, compressors, steam turbines and hydraulic or pneumatic control devices. They also maintain and analyze machinery operating records and reports.

Military Duties Translated:

Control a variety of power-generation equipment and machinery during normal operation, scheduled maintenance and emergency repair procedures Monitor meters, gauges and control boards to verify operational parameters, and make adjustments to distribution, generator output, voltage and electricity flow rates according to standard protocols and power grid requirements Utilize a variety of analog and digital informational displays to understand operational performance variables, such as electricity flow and voltage, and record information accurately into manual logs and computer databases Oversee machinery indicators to determine existence of malfunctions or suboptimal performance, and initiate appropriate repair procedures when necessary Start and stop turbines and other power-generation equipment as necessary to maintain safe operation, allow for repair work and meet changing supply and demand variables Follow all relevant safety protocols and legal codes to ensure proper operation of equipment and minimize risk of damage to property and personnel Participate in regular training to improve performance, acquire professional licenses and maintain certification required by company and government regulations

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