Lieutenant commander (Royal Navy)

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Lieutenant commander
A Royal Navy lieutenant commander's rank insignia
Country	United Kingdom
Service branch	Royal Navy
Abbreviation	Lt Cdr
NATO rank code	OF-3
Next higher rank	Commander
Next lower rank	Lieutenant
Equivalent ranks	Major (Army; Royal Marines) Squadron leader (RAF)

Lieutenant commander (often abbreviated Lt Cdr), formerly more commonly lieutenant-commander, is a senior officer rank in the Royal Navy of the United Kingdom. It is immediately junior to commander and immediately senior to the naval rank of lieutenant.

The equivalent rank in the British Army and Royal Marines is major; and in the Royal Air Force, it is squadron leader.