|Ordered||23 Dec 1939|
|Laid down||1 Dec 1940||AG Weser, Bremen (werk 1011)|
|Launched||22 Jul 1941|
|Commissioned||25 Oct 1941||Oblt. Günther Pfeffer|
|Successes||3 ships sunk, total tonnage 17,641 GRT|
Sunk at 1345hrs on 9 October 1942 in the Bay of Biscay south-west of Lorient, in position 47.39N, 03.34W, by an air-laid mine in the British minefield Artichokes. 22 dead and 30 survivors.
The wreck of this boat has been discovered in position 47.39.532N, 03.34.778W.
This boat is a dive site
Near Lorient and Isle de Groix at 40m depth.Depth: 120 feet (37 meters)
Position (lat, long): 47.39, -3.34
See more U-boat dive sites.
Attacks on this boat and other events
1 Aug 1942
However, U-166 was sunk the day before. The target may have been U-171.(Sources: 2001-06-01, uboat.net)
1 recorded attack on this boat.
Men lost from U-boats
Unlike many other U-boats, which during their service lost men due to accidents and various other causes, U-171 did not suffer any casualties (we know of) until the time of her loss.