Ranks & Insignia
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Commissioned Officers

Grade StarFleet StarFleet Marine Corps
O-12 Fleet Admiral (FADM) No Equivalent Rank
O-11 Admiral (ADM) General (GEN)
O-10 Vice Admiral (VADM) Lieutenant General (LGN)
O-9 Rear Admiral (RADM) Major General (MGN)
O-8 Commodore (COMM) Brigadier General (BGN)
O-7 Fleet Captain (FCAPT) Brigadier (BDR)
O-6 Captain (CAPT) Colonel (COL)
O-5 Commander (CDR) Lieutenant Colonel (LTC)
O-4 Lieutenant Commander (LCDR) Major (MAJ)
O-3 Lieutenant (LT) Marine Captain (MCPT or MCAPT)
O-2 Lieutenant Junior Grade (LTJG) First Lieutenant (1LT)
O-1 Ensign (ENS) Second Lieutenant (2LT)


Warrant Officers

Grade StarFleet StarFleet Marine Corps
W-5 No Equivalent Ranks Chief Warrant Officer (CWO5)
W-4 Chief Warrant Officer (CWO4)
W-3 Chief Warrant Officer (CWO3)
W-2 Chief Warrant Officer (CWO2)
W-1 Warrant Officer (WO)


Enlisted

Grade StarFleet StarFleet Marine Corps
E-9 Master Chief Petty Officer of StarFleet (MCPO-SFI) Sergeant Major of the SFMC (SGM/SFMC)
Master Chief Petty Officer (MCPO) Sergeant Major (SGM)

Master Gunnery Sergeant (MGSGT)
E-8 Senior Chief Petty Officer (SCPO) First Sergeant (1SGT)

Master Sergeant (MSGT)
E-7 Chief Petty Officer (CPO) Gunnery Sergeant (GSGT)
E-6 Petty Officer First Class (PO1) Staff Sergeant (SSGT)
E-5 Petty Officer Second Class (PO2) Sergeant (SGT)
E-4 Petty Officer Third Class (PO3) Corporal (CPL)
E-3 Crewman First Class (CRM1) Lance Corporal (LCPL)
Crewman (CRM)
E-2 Crewman Apprentice (CRA) Private First Class (PFC)
E-1 Crewman Recruit (CRR) Private (PVT)


Cadets

Grade StarFleet
C-4 Cadet First Class (CDT1)
C-3 Cadet Second Class (CDT2)
C-2 Cadet Third Class (CDT3)
C-1 Cadet Fourth Class (CDT4)
C-0 Cadet (CDT)
StarFleet Marine Corps
Cadet First Lieutenant (CDT 1LT)
Cadet Second Lieutenant (CDT 2LT)
Cadet Sergeant Major (CDT SGM)

Cadet Master Gunnery Sergeant (CDT MGSGT)
Cadet First Sergeant (CDT 1SGT)

Cadet Master Sergeant (CDT MSGT)
Cadet Gunnery Sergeant (CDT GSGT)
Cadet Staff Sergeant (CDT SSGT)
Cadet Sergeant (CDT SGT)
Cadet Corporal (CDT CPL)
Cadet Lance Corporal (CDT LCPL)
Cadet Private First Class (CDT PFC)
Cadet Private (CDT PVT)