Lieutenant commander (Royal Navy)

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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. In keeping with all other double-barrelled officer ranks in the UK Armed Forces, Lieutenant Commander is abbreviated to its higher component in shorthand. Thus, Lieutenant Commander John Smith of the Royal Navy should be referred to as "Commander Smith" and addressed as either "Commander Smith" or, simply, "Commander". The full rank of "Lieutenant Commander" should only be used when the officer's full name ("Lieutenant Commander John Smith Royal Navy") is used.

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