German submarine U - 2336 German submarine " U - 2336 " was a Type XXIII U - boat of the German " Kriegsmarine " during World War II . " U - 2336 " had a very short career . She only conducted one war patrol and sank only three vessels , one of which was another German U - boat ( " U - 2344 " ) . Despite her short time in service , " U - 2336 " is known for sinking the last two Allied merchant ships to be lost to a submarine in the war when she torpedoed and sank the freighters " Avondale Park " and " Sneland I " off the Isle of May inside the Firth of Forth . Following the war , " U - 2336 " was handed over to the Allies where she was taken to the British port of Lisahally and sunk in Operation " Deadlight " on 3 January 1946 . Construction . " U - 2336 " was the 16th U - boat that was constructed in the Type XXIII class . She was ordered on 20 September 1943 , and was laid down on 27 July 1944 at Deutsche Werft , Hamburg , as ' werk 490 ' in ship yard number 36 . She was launched on 10 September 1944 and commissioned under the command of " Oberleutnant " Jürgen Vockel on 30 September of that year . By the time she was operational , " U - 2336 " was equipped with only two bow torpedoes due to a lack of space and had a crew of 14 – 18 men . She had a range of at on the surface and at while submerged . " U - 2336 " < nowiki > s < / nowiki > maximum speed was while surfaced and when she was submerged . Service record . 1st patrol . Following training exercises with the " 32nd U - boat Flotilla " from 30 September 1944 to 15 February 1945 , " U - 2336 " began her first war patrol as the front boat of the " 4th U - boat Flotilla " on 16 February 1945 . However , it took about two months for " U - 2336 " to actually leave her home port of Kiel , which she finally did on 18 April 1945 under a new commander , " Kapitänleutnant " Emil Klusmeier . Following five days of traveling across the straits of Kattegat and Skagerrak , " U - 2336 " reached Larvik , Norway on 24 April 1945 ; which was to be her new home port for the remainder of the war . On 1 May 1945 , " U - 2336 " left Larvik and headed out into the North Sea . On 7 May 1945 , " U - 2336 " sank the last Allied merchant ships to be lost to a German submarine in the war , when she torpedoed and sank the freighters " Avondale Park " and " Sneland I " ( in order ) off the Isle of May inside the Firth of Forth . The first of the two ships to be sunk was the " Sneland I " , which exploded as soon as it was hit killing seven of her crew members , including the captain . " Avondale Park " was hit next , alarming the 28 man crew who believed that they had struck a mine . " Avondale Park " sank two minutes after being hit . Two crew members had been killed while the rest managed to enter a lifeboat or jump into the sea . " U - 2336 " later returned to Kiel on 14 May 1945 and then transferred to Wilhelmshaven , Germany , where she was surrendered to the Western Allies . Post - war . After being surrendered to the Western Allies , " U - 2336 " was taken to Lisahally , United Kingdom on 21 June 1945 to take part in Operation " Deadlight " where she was sunk on 3 January 1946 by gunfire from the British destroyer HMS " Offa " . Ships sunk by U - 2336 . < nowiki > * < / nowiki > rammed and sunk by " U - 2336 "