Federation Officer, Insignia & Titles

Naval Rank	Insignia	Abbreviation		Marine Rank	Insignia	Abbreviation
Fleet Admiral		FAdm.		Field Marshal		FMar.
Admiral		Adm.		General		Gen.
Vice-Admiral		VAdm.		Lieutenant-General		Lt. Gen.
Rear-Admiral		RAdm.		Major-General		MGen.
Commodore		Com.		Brigadier-General		BGen.
Captain		Capt.		Colonel		Col.
Commander		Cdr.		Lieutenant-Colonel		Lt. Col.
Lieutenant-Commander		Lt. Cdr.		Major		Maj.
Lieutenant		Lt.		Marine-Captain		MCapt.
Lieutenant-Junior Grade		Lt. (jg).		1st Lieutenant		1Lt.
Ensign		Ens.		2nd Lieutenant		2Lt.
Cadet 4th Year		C4		Cadet 4th Year		C4
Cadet 3rd Year		C3		Cadet 3rd Year		C3
Cadet 2nd Year		C2		Cadet 2nd Year		C2
Cadet 1st Year		C1		Cadet 1st Year		C1

Federation Enlisted, Insignia & Titles

Naval Rate	Insignia	Abbreviation		Marine Rate	Insignia	Abbreviation
Master Chief Petty Officer		MCPO		Sergeant Major		SMaj.
Senior Chief Petty Officer		SCPO		Master Sergeant		MSgt.
Chief Petty Officer		CPO		Gunnery Sergeant		GSgt.
Petty Officer 1st Class		PO1		Staff Sergeant		SSgt.
Petty Officer 2nd Class		PO2		Sergeant		Sgt.
Petty Officer 3rd Class		PO3		Corporal		Cpl.
Crewman		CM		Lance Corporal		LCpl.
Crewman Apprentice		CMA		Private 1st Class		Pvt 1.
Crewman Recruit		CMR		Private		Pvt.

Warrant Officers Insignias & Ranks

Fleet Insignia	Marine Insignia	Rank	Abbreviation
		Chief Warrant Officer	CWO
		Master Warrant Officer	MWO
		Staff Warrant Officer	SWO
		Warrant Officer	WO

Addressing an Officer, Enlished, or Commanding Officer

1. The Commanding Officer is referred to as "Captain," regardless of rank.

2. The use of "Sir" is used to address an Officer of higher rank, even if he/she is "outranked" in terms of position. Enlisted personnel are never addressed as "Sir"; unless they have their Warrant Officer commission.

3. In addressing personnel by rank, it is not necessary to call them by their full rank. In other words, you do not walk down a corridor and say "Good morning, Lieutenant Commander," or "Hello, Petty Officer First Class."