First Lieutenant

First Lieutenant is a military rank.

The rank of Lieutenant has different meanings in different military formations (see comparative military ranks), but in all cases it is common for it to be divided.

In the United States Army, Air Force and Marine Corps, First Lieutenant is the second-lowest ranking commissioned officer. It is one step above the rank of Second Lieutenant. In the British Army and Royal Marines, the rank is only Lieutenant, with no ordinal attached.

In the Royal Navy, the rank of Lieutenant is equivalent to that of a Captain in the army. First Lieutenant is not a specific rank, but aboard a ship, one officer would be designated as First Lieutenant (familiarly, "Number One") and would be the effective second in command. This is still the case, although the First Lieutenant often now holds the rank of Lieutenant Commander. In smaller ships he also holds the position of Executive Officer, although in larger ships he is the XO's deputy.

In the United States Navy, First Lieutenant is a position title and is held by the officer in command of the Deck Department. On smaller ships, a First Lieutenant holds the rank of Lieutenant Junior Grade. On larger vessels, the position is held by a Lieutenant or, in the case of extremely large warships such as aircraft carriers, a Lieutenant Commander or even full Commander.

Missing image Us_flag_large.png Flag of the United States U.S. commissioned officer ranks
	Student Officer	O-1	O-2	O-3	O-4	O-5	O-6	O-7	O-8	O-9	O-10
United_States_Navy:	Midn	Ens	LtJG	Lt	LCdr	Cdr	Capt	RAdm (lower)	RAdm (upper)	VAdm	Adm	Fleet Admiral
United_States_Marine_Corps:	Midn	2Lt	Lt	Capt	Maj	Lt Col	Col	Brig Gen	Maj Gen	Lt Gen	Gen	(no equivalent)
United_States_Army:	Cdt	2Lt	1Lt	Cpt	Maj	LtC	Col	Brig Gen	MGen	LtGen	Gen	General of the Army
United_States_Air Force:	C/	2Lt	1Lt	Capt	Maj	Lt Col	Col	Brig Gen	Maj Gen	Lt Gen	Gen	General of the Air Force

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See also: First Lieutenant, Admiral, Admiral of the Fleet (Royal Navy), Air Chief Marshal, Air Commodore, Air Force, Air Marshal, Air Vice Marshal