Ralf-Reimar Wolfram (31 March 1912 – 9 February 1945) was a Korvettenkapitän during World War II. During his career he commanded two U-boats for a total of 118 days at sea spanning four patrols. During his third patrol he sank the , an American liberty ship. Robert Gray was a straggler from convoy HX 234 en route to Britain.