Rear admiral

Rear admiral is a flag officer rank that is usually between a commodore and vice admiral.

During the 24th century, the Federation Starfleet depreciated the commodore grade, replacing it with rear admiral lower half.

Also, the Hydran rank of third admiral is roughly equivalent to the Starfleet rank of rear admiral (upper half). (RIS Bouteina: "Hilbert Hotel")

The Lyran Starfleet rank of senior commodore is roughly equivalent to rear admiral (upper half). (Star Trek: The Stoneship Files)

Starfleet insignia

Rear admiral lower half

2350s-2360s	2360s-2370s service uniform	2360s-2370s duty uniform	2373-
File:2350 - RDML (Command).png

2380s-2400s	Alternate 2390s	29th century
File:RDML (2380s).png File:Red (2380s).png	File:RDML (2390s).png File:Red (2390s).png

Rear admiral upper half

22nd century	2230s	AR 2250s
File:Red Flag (ENT).png		File:Alternate 2250s - RADM.png

2250s	2265-2270s	Early 2270s	Late 2270s-2350s
		File:2270 - RADM (Command).png	File:2278 - RADM (Command).png
		File:2270 - RADM Sleeve.png	File:2278 - RADM Sleeve (Command).png

2350s-2360s	2360s-2370s service uniform	2360s-2370s duty uniform	2373-
File:2350 - RADM (Command).png

2380s-2400s	Alternate 2390s	29th century
File:RADM (2380s).png File:Red (2380s).png	File:RADM (2390s).png File:Red (2390s).png

Other insignia

Klingon Navy 23rd century

		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
Kai Imperium		TRN MNX IMUN	LGN3 LGN2 LGN1	CLGN	CEN	SCEN		PVT	PRN		OP	TRB VIC	PR	PTR		MST	LEG	IMP

External links

• Rear admiral article at Memory Alpha, the canon Star Trek wiki.
• Rear admiral article at Memory Beta, the non-canon Star Trek wiki.