United States Navy Machinist's Mate Embroidered Coverall Collar Device
Criteria: The Navy Machinist's Mate (MM) is in charge of operating, maintaining, and repairing (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. The Machinist Mate also operates and maintains (organizational and Intermediate level) marine boilers, pumps, forced draft blowers, and heat exchangers; performs tests, transfers, and inventory of lubricating oils, fuels, and water. Lastly, they maintain records and reports, and may perform duties in the generation and stowage of industrial gases.
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