She was ordered on 20 September 1944, and was laid down on 6 December 1944 at Deutsche Werft AG, Hamburg, as yard number 519.

[3] Scuttled on 8 May 1945, the boat was raised in June 1956 and commissioned into the newly founded Bundesmarine as Hai, where she served until she sank by accident on 14 September 1966.

[3] In 1963 Hai was fitted at the shipyard of Blohm & Voss with a new diesel engine and at the same time lengthened by 1.2 meters.

[citation needed] In June 1956, U-2365 was raised by the German Federal Navy and commissioned Hai on 15 August 1957.

Nineteen of the twenty crewmen were lost, making this one of the worst peacetime naval disasters in German history.