|Ordered||10 Apr 1941|
|Laid down||26 Apr 1942||F Schichau GmbH, Danzig (werk 1537)|
|Launched||23 Dec 1942|
|Commissioned||27 Mar 1943||Oblt. Günther Stark|
|Successes||No ships sunk or damaged|
Listed as missing in the English Channel after 6 June, 1944. 51 dead (all hands lost). (Axel Niestlé, August 1996).
There is a possibility that the boat was sunk either by a Liberator aircraft (Sqdn. 53/L) on June 7 in position 48.34N, 05.23W or Liberator aircraft (Sqdn. 224/G) on 8 June in position 48.27N, 05.47W.
Previously recorded fate
- Sunk 9 June, 1944 south-west of the Scilly Isles, in position 49.09N, 08.37W, by depth charges from a British Liberator aircraft (Sqdn. 120/F). (Postwar assessment)
Notes. This attack was in fact against a nonsub target.
Men lost from U-boats
Unlike many other U-boats, which during their service lost men due to accidents and various other causes, U-740 did not suffer any casualties (we know of) until the time of her loss.