USCG Ranks Ordered Lowest-to-Highest
E-2
FA
Fireman Apprentice
E-4
PO3
Petty Officer 3rd Class
E-5
PO2
Petty Officer 2nd Class
E-6
PO1
Petty Officer 1st Class
E-7
CPO
Chief Petty Officer
E-8
SCPO
Senior Chief Petty Officer
E-9
MCPO
Master Chief Petty Officer
E-9
CMC
Command Master Chief Petty Officer
E-9
MCPOCG
Master Chief Petty Officer of the Coast Guard
W-2
W-2
Chief Warrant Officer 2
W-3
CWO3
Chief Warrant Officer 3
W-4
CWO4
Chief Warrant Officer 4
W-5
CWO5
Chief Warrant Officer 5
O-2
LTJG
Lieutenant Junior Grade
O-4
LCDR
Lieutenant Commander
O-7
RDML
Rear Admiral (Lower Half)
O-8
RADM
Rear Admiral (Upper Half)
O-10
ADM
Admiral Chief of Naval Operations / Commandant of the Coast Guard