Lieutenant commander

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.

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".

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

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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.

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