Lieutenant commander

A US Navy lieutenant commander's sleeve/shoulder insignia
NaviesArmiesAir forces
Commissioned officers
Admiral of
the fleet
Field marshal or
General of the Army
Marshal of
the air force
AdmiralGeneralAir chief marshal
Vice admiralLieutenant generalAir marshal
Rear admiralMajor generalAir vice-marshal
CommodoreBrigadier or
brigadier general
Air commodore
CaptainColonelGroup captain
CommanderLieutenant colonelWing commander
Lieutenant
commander
Major or
Commandant
Squadron leader
LieutenantCaptainFlight lieutenant
Lieutenant
junior grade
or
sub-lieutenant
Lieutenant or
first lieutenant
Flying officer
Ensign or
midshipman
Second lieutenantPilot officer
Officer cadetOfficer cadetFlight cadet
Enlisted grades
Warrant officer or
chief petty officer
Warrant officer or
sergeant major
Warrant officer
Petty officerSergeantSergeant
Leading seamanCorporal or
bombardier
Corporal
SeamanPrivate or
gunner or
trooper
Aircraftman or
airman
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Lieutenant commander (also hyphenated lieutenant-commander and abbreviated LCdr,[1] LCdr.[2] or LCDR[3][4]) is a commissioned officer rank in many navies. The rank is superior to a lieutenant and subordinate to a commander. The corresponding rank in most armies (armed services) and air forces is major, and in the Royal Air Force and other Commonwealth air forces is squadron leader.

The NATO rank code is mostly OF-3.[5]

A lieutenant commander is a senior department officer or the executive officer (second-in-command) on many warships and smaller shore installation, or the commanding officer of a smaller ship/installation.[6] They are also senior department officers in naval aviation squadrons.

Etymology

Most Commonwealth and other navies address lieutenant commanders by their full rank or the positions they occupy ("captain" if in command of a vessel). The United States Navy, however, addresses officers by their full rank or the higher grade of the rank. For example, oral communications in formal and informal situations, a lieutenant (junior grade) is abbreviated as "lieutenant," and a lieutenant commander is abbreviated as "commander." [7]

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