Admiral
ADML
Vice Admiral
VADM
Rear Admiral
RADM
Commodore
CDRE
Captain
CAPT
Commander
CMDR
Chaplain
CHAP
Lieutenant Commander
LCDR
Lieutenant
LEUT
Sub Lieutenant
SBLT
Acting Sub Lieutenant
ASLT
Midshipman
MIDN
Warrant Officer of the Navy
WO-N
Warrant Officer
WO
Chief Petty Officer
CPO
Petty Officer
PO
Leading Seaman
LS
Able Seaman
AB
Seaman
SMN
Note: Chaplains and MSWOs are commissioned officers without rank. However, for ceremonial and protocol purposes they are, where appropriate, normally grouped with Commanders.