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Lieutenant, junior grade is a commissioned rank in Starfleet. They are commonly addressed as "Lieutenant."

This makes it difficult to distinguish which lieutenants are of which grade

Positions and Lists

• Rachel Garett
• Gretchen Naylor

Command Division

• Chakotay, captain's aide
• Jack Crusher
• James T. Kirk
• Veronica Stadi, pilot
• Worf, son of Mogh

Operations Division

• Ronni Beth, engineer
• Joseph Carey, chief of impulse propulsion systems
• Domenica Corsi, deputy chief of security
• Kieran Duffy, engineer
• Geordi La Forge
• Nog, engineer, conn officer
• Rrairr, security officer
• T'Lirin, security officer
• Nyota Uhura, junior communications officer

Chronology

Dates listed are first appearence or mention at that rank except as noted.

2256

• James T. Kirk promoted from Ensign

2257

• James T. Kirk promoted to Lieutenant

2316

• Rachel Garett

2349

• Jack Crusher

2353

• Chakotay

2362

• Joseph Carey promoted from Ensign

2364

• Joseph Carey goes off active duty for treatment
• Geordi La Forge
• Worf promoted from Ensign, later promoted to Lieutenant

2365

• Kieran Duffy

2366

• Domenica Corsi

2367

• Joseph Carey returns to active duty

2369

• Joseph Carey promoted to Lietenant
• Veronica Stadi promoted from Ensign

2371

• Veronica Stadi promoted to Lieutenant

2373

• Gretchen Naylor

2375

• Nog promoted from Ensign, later promoted to Lieutenant

2376

• Ronni Beth promoted from Ensign

2379

• Rrairr
• T'Lirin

Connections

• Lieutenant junior grade article at Memory Alpha, the wiki for canon Star Trek.
• Lieutenant Junior Grade article at Star Trek Expanded Universe, the fanon Star Trek wiki.

The Star Trek Expanded Universe Database is for fanon and related content. See Memory-Alpha.org for the canon Star Trek wiki.

Lieutenant junior grade (also called junior lieutenant, lieutenant j.g., or just j.g.) is a military rank used in Federation Starfleet from the 2280s through the 24th century, immediately superior to ensign and immediately subordinate to lieutenant. The corresponding rank in the marines is first lieutenant. Officers with rank lieutenant j.g. are addressed as 'lieutenant'.

In the Starfleet Starfighter Corps the equivalent rank is either flying officer (Star Trek: Daedalus) or lieutenant junior grade (Star Trek: Swiftfire).

History

The term comes from the United States Navy of the 20th century. The USN abbreviation was LTJG.

The corresponding term in Commonwealth navies, including the Royal Navy of Britain, was sub-lieutenant. The RN has no equivalent of ensign, so sub-lieutenant was the most junior officer rank.

The Earth Starfleet of the 22nd century may not have had this rank, so that the rank immediately below lieutenant was ensign.

The costume department for ENT did not have an insignia for it, so it never appeared on screen.

In the 2260s a single broken sleeve stripe was used as the insignia for junior lieutenants.

This only appeared on screen once. Characters without sleeve stripes were variously addressed as 'crewman', 'ensign', or 'lieutenant'. Can we interpret the last as having recently been promoted to lieutenant j.g. but not got around to upgrading their uniform?

In the 2270s this was instead used to mean ensign, and there was no lieutenant j.g. rank. (Star Trek: The Motion Picture)

From the 2280s the lieutenant j.g. rank had a distinctive rank pin.

Starfleet insignia

22nd century	2230s	AR 2250s	2250s	2265-2270s	Early 2270s	Late 2270s-2350s
					N/A

2350s-2360s	2360s-2370s	2373-	2390s	29th century

External links

• Lieutenant junior grade article at Memory Alpha, the canon Star Trek wiki.
• Lieutenant junior grade article at Memory Beta, the non-canon Star Trek wiki.
• Lieutenant junior grade article at Wikipedia, the free encyclopedia.