Navy Ranks

NAVY ENLISTED RANKS

SR = Seaman Recruit; E1 

SA = Seaman Apprentice; E2 

SN = Seaman; E3 

PO3 = Petty Officer Third Class; E4 

PO2 = Petty Officer Second Class; E5 

PO1 = Petty Officer First Class; E6 

CPO = Chief Petty Officer; E7 

SCPO = Senior Chief Petty Officer; E8 

MCPO = Master Chief Petty Officer; E9 

NAVY OFFICER RANKS

ENS = Ensign; O1 

LTJR = Lieutenant Junior Grade; O2 

LT = Lieutenant; O3 

LCDR = Lieutenant Commander; O4 

CDR = Commander; O5

CAPT = Captain; O6

RADML = Rear Admiral Lower Half; O7

RADML = Rear Admiral Upper Half; O8

VADM = Vice Admiral; O9

ADM = Admiral; O10

FADM = Fleet Admiral; O11