| Abbreviation | Definition |
|---|---|
| GSM1 | Gas Turbine System Technician (mechanical) Petty Officer 1st Class |
| GSM1 | s Turbine System Technician (mechanical) Petty Officer 1st Class |
| GSM2 | Gas Turbine System Technician (mechanical) Petty Officer 2nd Class |
| GSM2 | s Turbine System Technician (mechanical) Petty Officer 2nd Class |
| GSM3 | Gas Turbine System Technician (mechanical) Petty Officer 3rd Class |
| GSM3 | s Turbine System Technician (mechanical) Petty Officer 3rd Class |
| GSMC | Gas Turbine System Technician (mechanical) Chief Petty Officer |
| GSMC | s Turbine System Technician (mechanical) Chief Petty Officer |
| GSMFA | Gas Turbine System Technician (mechanical) Fireman Apprentice |
| GSMFA | s Turbine System Technician (mechanical) Fireman Apprentice |
| GSMFN | Gas Turbine System Technician (mechanical) Fireman |
| GSMFN | s Turbine System Technician (mechanical) Fireman |
| GSMFR | Gas Turbine System Technician (mechanical) Fireman Recruit |
| GSMFR | s Turbine System Technician (mechanical) Fireman Recruit |
| GSSA | Guided Missleman Seaman Apprentice |
| GSSA | ided Missleman Seaman Apprentice |
| GSSN | Guided Missleman Seaman |
| GSSN | ided Missleman Seaman |
| GSSR | Guided Missleman Seaman Recruit |
| GSSR | ided Missleman Seaman Recruit |