HMS Adamant

Three ships of the Royal Navy have been named HMS Adamant:

• HMS Adamant (1780) was a 50-gun fourth rate launched in 1780. She was reduced to harbour service in 1809 and was broken up in 1814.
• HMS Adamant (1911) was a submarine depot ship launched in 1911, commissioned in 1912 and sold in 1932.
• HMS Adamant (A164) was a submarine depot ship launched in 1940 and broken up in 1970.