Lieutenant is a rank of officer in many military organizations, naval services and space forces, most notably Earth Starfleet and its Federation Counterpart. The common title of address for a Lieutenant is "Lieutenant," when the generic "sir" is otherwise inappropriate. In the Federation Starfleet, the United Nations Space Command, and Homeworld Command the rank name is derived from English-speaking naval tradition.
A Lieutenant is a low-level line officer rank, in naval organizations a grade higher than a Lieutenant Junior Grade and a grade below Lieutenant Commander. The Lieutenant rank is roughly equivalent with the authority of a Infanty Captain of military forces. The Lieutenant grades of such military units are generally divided up as Second Lieutenant and First Lieutenant
A lieutenant in Starfleet may be assigned as a department head or senior staff member of a mid-to-large size command such as a capital ship or space station. Some examples include Security Chief Xonak of the USS Olympia, Chief Engineer Nathan DeSora of the USS Olympia or Chief Science Officer Jadzia Dax of Starbase Deep Space 9.
A lieutenant could also serve as the first officer of a smaller starship or the second officer or third officer of a mid-size vessel. First Officer Ezri Dax of the USS Defiant and Second Officer Tuvok of Voyager filled these roles, respectively.
- In the Romulan Star Navy, the rank of lieutenant is normally used but an additional equivalent, trinam, also exists on some branches.
- In the Cardassian language, glinn is a Cardassian officer rank title which, in translation to Federation Standard, is approximately equivalent to a lieutenant .
- In the Klingon Defense Force, the rank of lieutenant is represented by a rank insignia of a stylized, bi-segmented shape, within a circle.
Lieutenant's in TFE
- Lieutenant Bremar Celes Chief Security/Tactical Officer USS Icarus & USS Nautilus
- Lieutenant Nathan DeSora Chief Engineer USS Olympia
- Lieutenant Ech‘telan Head Nurse USS Olympia
- Lieutenant Fel Ra-haresilo Communications Chief USS Olympia
- Lieutenant Ronny Garber † Strategic Operations Officer USS Nautilus
- SRU Lieutenant Kestra Graxx Strategic Response Unit Leader USS Nautilus & USS Hera
- Lieutenant Julie-Ann Maxwell Test Command Officer Aberdeen Testing Facility
- Lieutenant Declan Moreau Tactical Information Centre Commander USS Olympia
- Lieutenant Navra Chief Flight Control Officer USS Olympia
- Lieutenant Rodak Chief Flight Control Officer USS Augustus
- Lieutenant Tirania Roher Chief Counsellor USS Olympia
- Lieutenant Sovan Chief Security/Tactical Officer USS Augustus
- Lieutenant Suvok Assistant Chief Engineer USS Olympia
- Lieutenant Tira'Ridala nev-Theyla Communications Chief ISS Vanguard
- Lieutenant Xonak Chief Security/Tactical Officer USS Olympia
|Era||Command Division||Operations Division||Sciences Division|
|Command/Flight Operations/Strategic Operations||Security/Operations/Engineering||Medical/Science/Counselling||Intelligence|
|Federation Starfleet Ranks (2350s-2366)|
|Federation Starfleet Ranks (2360s-2370s)|
|Federation Starfleet Ranks (2370s-2380s)|
|Federation Starfleet Ranks (2386-)|
|Terran Confederacy Ranks|