| Position | Symbol |
| Astrometrics Officer | AO |
| Commanding Officer | CO |
| Communications Specialist | CS |
| Computer Specialist | MS |
| Conn Officer | CO |
| Counselor | C |
| Engineering Officer | EO |
| Executive Officer | XO |
| Helmsman | H |
| Intelligence Officer | IO |
| Medical Officer | MO |
| Navigator | N |
| Operations Officer | OO |
| Science Officer | SO |
| Second Officer | 2O or AXO |
| Security Officer | RO |
| Shuttle Pilot | SP |
| Tactical Officer | TO |
| Weapons Specialist | WS |
| Yoeman | Y |
| Grade | Rank | Abbreviation |
| O-10 | Admiral | Adm. |
| O-9 | Vice-Admiral | VAdm. |
| O-8 | Rear-Admiral | RAdm. |
| O-7 | Commodore | Comm. |
| O-6 | Captain | Capt. |
| O-5 | Commander | Cmdr. |
| O-4 | Lieutenant Commander | Lt. Cmdr. |
| O-3 | Lieutenant | Lt. |
| O-2 | Lieutenant Junior Grade | Lt. J.G. |
| O-1 | Ensign | Ens. |
