Star Trek Expanded Universe
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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'.

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
LTJG (ENT)
Yellow (ENT)
LTJG (2230s)
Blue (2230s)
2240s-2250s 2250s 2260s-2270s Early 2270s[1]
(Shoulders/Sleeves)
Late 2270s-2350s
(Shoulders/Sleeves)
LTJG Gold (2240s-2250s)
Officer (2250s)
Yellow (2250s)
LTJG (TOS)
Yellow (TOS)
N/A
LTJG Shoulder (TWOK)
White Shoulder (TWOK)
LTJG Sleeve (TWOK)
White Officer Sleeve (TWOK)
2350s-2360s 2360s-2370s
service uniform
2360s-2370s
duty uniform
2370s-2380s
LTJG (Early TNG)
Red (Early TNG)
LTJG (TNG)
Red (TNG)
LTJG (DS9-VOY)
Red (VOY)
LTJG (DS9-VOY)
Red (DS9)
Early 2380s Mid 2380s 2390s

Alternate realities[]

2250s 2380s-2400s 2390s 29th century
LTJG (STXI)
Yellow (STXI)
LTJG (alternate 2380s)
Red (alternate 2380s)
LTJG (alternate 2390s)
Red (alternate 2390s)
LTJG (2800s)
Blue (2800s)

Non-Starfleet insignia[]

Klingon Navy Lyran Starfleet
Klingon Navy - LTJG Lyran SE O-3
Enlisted ranks Etc Officer ranks Flag ranks
Starfleet
Officers
Enlisted
Misc.
CR
CA
CN
PO3
PO2
PO1
CPO SCPO MCPO
CMCPO
FMCPO
MCPOSF
WO
CDT
MID
REC
ENS LTJG LT LCDR CDR CAPT
FCAPT
CDRE
RDML
RADM
VADM ADM FADM
Klingon Defense Force
(Ground forces & navy)
Bekk Cpl Sgt MSgt SgtMaj 2nd Lt 1st Lt Capt
(HoH)
Maj LtCol Col Brig
('ech)
LtGen Gen
(Sa')
PO2 PO1 CPO MCPO ENS LTJG LT
(Sogh)
LCDR CDR
(la')
CAPT
(HoD)
CDRE
(totlh)
VADM ADM


Lyran ranks CR
CN
PO2
PO1
CPO SCPO MCPO CDT ENS LTJG LT LCDR CDR CAPT
FCAPT
CDRE SCDRE VADM COUNT DUKE
KING

References[]

  1. The rank system used in the 2270s did not have a LTJG rank.

External links[]

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