| Abbreviation | Definition |
|---|---|
| LLO | Local Launch Operator |
| LMM | Landsman For Machinist's Mate |
| LMM | ndsman For Machinist's Mate |
| LMMA | Landsman For Machinist's Mate (aviation) |
| LMMA | ndsman For Machinist's Mate (aviation) |
| LMMMB | Landsman For Machinist's Mate (motor Boat) |
| LMMMB | ndsman For Machinist's Mate (motor Boat) |
| LMNA | London Merchant Navy Association |
| LN1 | galman Petty Officer 1st Class |
| LN1 | Legalman Petty Officer 1st Class |
| LN2 | galman Petty Officer 2nd Class |
| LN2 | Legalman Petty Officer 2nd Class |
| LNC | galman Chief Petty Officer |
| LNC | Legalman Chief Petty Officer |
| LNCM | galman Master Chief Petty Officer |
| LNCM | Legalman Master Chief Petty Officer |
| LNCS | galman Senior Chief Petty Officer |
| LNCS | Legalman Senior Chief Petty Officer |
| LOA | Ley Orgánica de la Armada |
| LOBLOLLYBOY | blolly Boy |