Unsinkable Sam (aka Oskar/Oscar) - cat who saw service in both the Kriegsmarine and Royal Navy during the Second World War, serving on board three vessels (the Bismarck, the HMS Cossack and the HMS Ark Royal) and surviving the sinking of all three.
Unsinkable Sam switched sides from the Nazi to the Allied forces. Survived 3 Ships Sinking in WWII. Pastel portrait “Oscar, the Bismarck’s Cat” by Georgina Shaw-Baker @ National Maritime Museum, Greenwich
Horton (Capt) -- Winston Churchill stops 'Blackie', ship's cat of HMS PRINCE OF WALES, crossing over to a US destroyer during the Atlantic Conference, August -- High quality art prints, canvases -- Imperial War Museum Prints
The Unsinkable Sam, the most famous mascot of the British Royal Navy, was in turn the ship's cat of the Bismarck, HMS Cossack, and HMS Ark Royal and survived the torpedoeing of all three ships before being retired to a home on dry land.
The cat pictured is Seaman Simon. He was a WWII hero to men on the Amethyst. The article attached is about a different cat called Sam. The article is titled, "Unsinkable Sam: The Cat that Survived Three Ships Sinking in WWII.