HMS Cato explained

Three vessels named HMS Cato or Cato have served the Royal Navy:

• was a 50-gun that disappeared, presumed to have foundered, circa January 1783.
• was launched on 5 May 1914 by Campbeltown Shipbuilding, Campbeltown for Bristol Steam Navigation. She was requisitioned as a store carrier on 4 November 1914 for the Royal Fleet Auxiliary. She sank on 3 March 1940 after having struck a mine that the German submarine had laid in the Bristol Channel (51.42°N -3.33°W).
• was a minesweeper launched on 7 September 1942 by Associated Shipbuilders, of Seattle, Washington United States. She was transferred to the Royal Navy on 28 July 1843 under Lend Lease. A German Neger human torpedo sank her on 6 July 1944 off Normandy.