Lieutenant commander

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In the Royal Navy, United States Navy, Royal Australian Navy, Royal New Zealand Navy, Canadian Forces Maritime Command (formerly the Royal Canadian Navy), United States Coast Guard, and many other navies and coast guards, a lieutenant commander (lieutenant-commander or Lt Cdr in the RN and abbreviated LCDR in the RAN) is a commissioned officer superior to a lieutenant and subordinate to a commander. The corresponding rank in the British Army, Royal Marines, United States Army, United States Air Force and United States Marine Corps is major, and in the Royal Air Force is squadron leader.

A lieutenant commander is a senior department officer on a large ship or shore installation. He or she may be commanding officer or executive officer (second-in-command) of a smaller ship or installation.

Note that unlike similarly-named military ranks (lieutenant colonel, lieutenant general), the title does not indicate a deputy or junior grade of commander, but a senior grade of lieutenant. Lieutenants were commonly put in command of smaller vessels not warranting a commander or captain: such a lieutenant was called a lieutenant commanding or lieutenant commandant in the USN, and a lieutenant in command or lieutenant and commander in the RN. The USN settled on lieutenant commander in 1862, and made it a distinct rank; the RN belatedly followed suit in 1914.

Royal Navy rank insignia

The insignia worn by a Royal Navy lieutenant-commander is two medium gold braid stripes with one thin gold stripe running in between, placed upon a navy blue/black background. The top stripe has the ubiquitous loop used in all RN officer rank insignia. The RAF follows this pattern with its equivalent rank of squadron leader.

Having fewer officer ranks than the army, the RN previously split some of its ranks by seniority (time in rank) to provide equivalence: hence a lieutenant with fewer than eight years' seniority wore two stripes, and ranked with an army captain; a lieutenant of eight years or more wore two stripes with a thinner one in between, and ranked with a major. This distinction was abolished when the rank of lieutenant-commander was introduced, the new rank taking the insignia and army equivalence of a senior lieutenant.

United States Navy rank insignia

While the gold oak leaf collar insignia worn by United States Air Force, Army, and Marine Corps majors are also worn by USN lieutenant commanders, they also wear on various uniforms the two medium and one narrow sleeve and shoulder braid stripe insignia like their counterparts in the Royal Navy, though with a specialty insignia instead of a loop. In this illustration, the inverted star of a Line Officer is used. The pay grade of this rank is O-4. The rank of lieutenant commander is abbreviated "LCDR".

The United States Navy and United States Coast Guard classify lieutenant commanders as mid-grade officers, along with commanders and captains.

Chapter 2.A.8. of the U.S. Coast Guard Personnel Manual states that Coast Guard lieutenant commanders rank with lieutenant commanders in the Navy, and majors in the Army, Air Force, and Marine Corps. The precedence of officers of the Coast Guard, Army, Navy, Air Force, Marine Corps, and Public Health Service when serving together, shall be (1) in accordance with their relative grade, (2) in accordance with their dates of rank when of the same relative grade, (3) in accordance with the time each has served on active duty as a commissioned officer of the United States when of the same relative grade with the same date of rank.

See also

• Military unit
• Comparative Military Ranks
• U.S. Navy Officer Rank Insignia

Image:Flag of the United Kingdom.svg British officer ranks
	Student Officer	OF(D)	OF-1	OF-2	OF-3	OF-4	OF-5	OF-6	OF-7	OF-8	OF-9	OF-10
Royal Navy:	OCdt	Mid	SLt	Lt	Lt Cdr	Cdr	Capt	Cdre	RAdm	VAdm	Adm	Admiral of the Fleet
Royal Marines:	OCdt		2Lt - Lt	Capt	Maj	Lt Col	Col	Brig	Maj Gen	Lt Gen	Gen
Army:	OCdt	OD	2Lt - Lt	Capt	Maj	Lt Col	Col	Brig	Maj Gen	Lt Gen	Gen	Field Marshal
Royal Air Force:	OCdt	OD	PO - FO	Flt Lt	Sqn Ldr	Wg Cdr	Gp Capt	ACdre	AVM	AM	ACM	MRAF

Image:Us flag large.png 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	O-11 (wartime only)	Special Grade
United States Navy:	MIDN/OC	ENS	LTJG	LT	LCDR	CDR	CAPT	RDML	RADM	VADM	ADM	FADM	Admiral of the Navy
United States Marine Corps:	Midn	2ndLt	1stLt	Capt	Maj	LtCol	Col	BGen	MajGen	LtGen	Gen	(no equivalent)	(no equivalent)
United States Army:	Cdt	2LT	1LT	CPT	MAJ	LTC	COL	BG	MG	LTG	GEN	General of the Army	General of the Armies
United States Air Force:	Cadet	2nd Lt	1st Lt	Capt	Maj	Lt Col	Col	Brig Gen	Maj Gen	Lt Gen	Gen	General of the Air Force	(no equivalent)
United States Coast Guard:	CDT	ENS	LTJG	LT	LCDR	CDR	CAPT	RDML	RADM	VADM	ADM	(no equivalent)	(no equivalent)

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