| Abbreviation | Definition |
|---|---|
| MLSRC | Molder (ship Repair-cupola) |
| MLSRF | lder (ship Repair-foundryman) |
| MLSRF | Molder (ship Repair-foundryman) |
| MLSRM | lder (ship Repair-molder) Petty Officer First Class |
| MLSRM | Molder (ship Repair-molder) Petty Officer First Class |
| MM1 | chinist's Mate 1st Class Petty Officer |
| MM1 | Machinist's Mate 1st Class Petty Officer |
| MM2 | chinist's Mate 2nd Class Petty Officer |
| MM2 | Machinist's Mate 2nd Class Petty Officer |
| MM3 | chinist's Mate Petty Officer 3rd Class |
| MM3 | Machinist's Mate Petty Officer 3rd Class |
| MMA1 | chinist's Mate (aviation) Petty Officer First Class |
| MMA1 | Machinist's Mate (aviation) Petty Officer First Class |
| MMA2 | chinist's Mate (avivation) Petty Officer Second Class |
| MMA2 | Machinist's Mate (avivation) Petty Officer Second Class |
| MMAGE1 | chinist's Mate ((aviation-bombing)) Petty Officer 1st Class |
| MMAGE1 | Machinist's Mate ((aviation-bombing)) Petty Officer 1st Class |
| MMAGE2 | chinist's Mate (aviation-bombing) Petty Officer 2nd Class |
| MMAGE2 | Machinist's Mate (aviation-bombing) Petty Officer 2nd Class |
| MMAH1 | chinist's Mate (aviation-hydrogen) Petty Officer 1st Class |