June 1944 - February 1945 31
U-Flottille (Hamburg) training
March 1945 - May 1945 11 U-Flottille (Bergen) Patrol
1 20 February 1945. Left Kiel and arrived at Horten on 23 February 1945.
Patrol 2 2 March 1945. Left Horten and arrived
at Bergen on 9 March 1945.
Patrol 3 25 March 1945. Left for British coastal
waters. From mid-April U 1023 operated in the Irish Sea and on the 19th she made an
unsuccessful attack on a convoy just south of Ireland. When the U-boat war ended on 4 May
1945, U 1023 was in the Irish Sea. In accordance with instructions received, U 1023 headed
for Weymouth. En route, she torpedoed and sank the Norwegian minesweeper NYMS 382 on the
evening of May 7 ESE of Torbay. She put in to Weymouth and surrendered on 10 May 1945.
U 1023 was one of 116 boats disposed of by the Royal Navy in Operation
Deadlight. In January 1946 she was towed from Lisahally by the tug HMS Saucy. U
1023 foundered under tow on 9 January north west of Malin Head. She had been used by the
Royal Navy for tests as submarine N 83. Operation
Deadlight. In January 1946 she was towed from Lisahally by the tug HMS Saucy. U
1023 foundered under tow on 9 January north west of Malin Head. She had been used by the
Royal Navy for tests as submarine N 83.