HMS Affray (P421)
 HMS Affray a British Amphion-class submarine was the last Royal Navy submarine to be lost at sea on 16 April 1951 with the loss of 75 lives. All vessels of her class were given names beginning with the letter A; she was the only ship of the Royal Navy to be named after a particularly noisy and disorderly fight.Affray was built in the closing stages of the Second World War. She was one of 16 submarines of her class which were originally designed for use in the Pacific Ocean against Japan.