| Abbreviation | Definition |
|---|---|
| SR2(F) | Specialist (firefighter) 2nd Class Petty Officer |
| SR3(F) | Specialist (firefighter) 3rd Class Petty Officer |
| SS1 | Seaman Signal 1st (non Petty Officer) |
| SS2 | Seaman Signal 2nd (non Petty Officer) |
| SS3 | Seaman Signal 3rd (non Petty Officer) |
| SSMB1 | Ship's Serviceman (barber) 1st Class Petty Officer |
| SSMB2 | Ship's Serviceman (barber) 2nd Class Petty Officer |
| SSMB3 | Ship's Serviceman (barber) 3rd Class Petty Officer |
| SSMC1 | Ship's Serviceman (cobbler) 1st Class Petty Officer |
| SSMC2 | Ship's Serviceman (cobbler) 2nd Class Petty Officer |
| SSMC3 | Ship's Serviceman (cobbler) 3rd Class Petty Officer |
| SSML1 | Ship's Serviceman (laundry Man) 1st Class Petty Officer |
| SSML2 | Ship's Serviceman (laundry Man) 2nd Class Petty Officer |
| SSML3 | Ship's Serviceman (laundry Man) 3rd Class Petty Officer |
| SSMT1 | Ship's Serviceman (tailor) 1st Class Petty Officer |
| SSMT2 | Ship's Serviceman (tailor) 2nd Class Petty Officer |
| SSMT3 | Ship's Serviceman (tailor) 3rd Class Petty Officer |
| SSNF | State Security Naval Forces |
| SSR | Sea Scrape Refit |
| SSTD | Surgeon's Steward |