| Abbreviation | Definition |
|---|---|
| SPG1 | Specialist (gunnery) Petty Officer 1st Class |
| SPG2 | ecialist (gunnery) Petty Officer 2nd Class |
| SPG2 | Specialist (gunnery) Petty Officer 2nd Class |
| SPG3 | ecialist (gunnery) Petty Officer 3rd Class |
| SPG3 | Specialist (gunnery) Petty Officer 3rd Class |
| SPGM1 | ecialist (aviation Free Gunnery Instructor) Petty Officer 1st Class |
| SPGM1 | Specialist (aviation Free Gunnery Instructor) Petty Officer 1st Class |
| SPGM2 | ecialist (aviation Free Gunnery Instructor) Petty Officer 2nd Class |
| SPGM2 | Specialist (aviation Free Gunnery Instructor) Petty Officer 2nd Class |
| SPGM3 | ecialist (aviation Free Gunnery Instructor) Petty Officer 3rd Class |
| SPGM3 | Specialist (aviation Free Gunnery Instructor) Petty Officer 3rd Class |
| SPGN1 | ecialist (anti Aircraft Gunnery Instructors) Petty Officer 1st Class |
| SPGN1 | Specialist (anti Aircraft Gunnery Instructors) Petty Officer 1st Class |
| SPGN2 | ecialist (anti Aircraft Gunnery Instructors) Petty Officers 2nd Class |
| SPGN2 | Specialist (anti Aircraft Gunnery Instructors) Petty Officers 2nd Class |
| SPGN3 | ecialist (anti Aircraft Gunnery Instructors) Petty Officer 3rd Class |
| SPGN3 | Specialist (anti Aircraft Gunnery Instructors) Petty Officer 3rd Class |
| SPI1 | ecialist (punch-card Accounting Machine Operator) Petty Officer 1st Class |
| SPI1 | Specialist (punch-card Accounting Machine Operator) Petty Officer 1st Class |
| SPI2 | ecialist (punch-card Accounting Machine Operator) Petty Officer 2nd Class |