 
			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 maritime spiritual wellbeing officers are commissioned officers without rank. However, for ceremonial and protocol purposes they are, where appropriate, normally grouped with commanders.