The Admiral military rank usually is amongst the highest rank officers can obtain in a naval service organization amongst several civilizations. The rank below Admiral is usually Captain, and the difference between the ranks is whereas a captain usually is the commanding officer of one starship, starbase or unit, an admiral is the commanding officer of several starships (or a fleet or armada of ships).
In ground-based military, the equivalent of this rank would usually be a General.
Starfleet uses several grades of this rank, including:
|Enlisted ranks||Non-commissioned officer ranks||Etc||Commissioned ranks||Flag ranks|
|Federation Marine Corps||Pvt||PFC||LCpl||Cpl||Sgt||SSgt||GySgt||MSgt|
|WO||2nd Lt||1st Lt||Capt||Maj||LtCol||Col||BGen||MajGen||LtGen||Gen||GenCorps
|Klingon ground troops||Bekk2||Bekk1||Cpl||Sgt||MSgt||SgtMaj||2nd Lt||1st Lt||Capt||Maj||LtCol||Col||Brig||LtGen||Gen|
|Romulan Star Navy||UHL||(unknown)||SLt||Lt||Cent||SCdr||Cdr||Adm|
|Tal Shiar||2nd Lt||1st Lt||Capt||Maj||Col||Gen|