The meaning of MACHINIST'S MATE is a petty officer in the engineer's department of the U.S. Navy.
The missing sailor was identified by Navy officials on Guam as Petty Officer 3rd Class Marshall McComb, an aviation machinist mate from St . Louis. The missing sailor was identified by US Navy officials on Guam as Petty Officer 3rd Class Marshall McComb, an aviation machinist mate from St Lo...