Rear Admiral Clarence "Johnny" Howard-Johnston DSO, DSC (13 October 1903 – 26 January 1996) was a British soldier and inventor.

[citation needed] According to one source, Howard-Johnston entered the Royal Navy in 1917[2] but his obituary in The Times says he first went to sea in 1922 as a midshipman.

[2] By the outbreak of the Second World War, he was back at the Admiralty but in 1940 was taken to organise anti-submarine operations in Norway.

A month later, he was ordered to demolish the port facilities at St Malo, and received a Mention in Dispatches for this work.

[2] Howard-Johnston was then transferred to command HMS Malcolm on the north Atlantic convoys, for which he received another Mention in Dispatches – and then the DSO, for the sinking of U-651.