sentences:  The wreck of what is believed to be "U-309" was located on 17 May 2001, 25 miles off Wick in of water.There are no identifying features, but the Type VIIC U-boat is close to the reported position of "U-309"s sinking, and the damage sustained is consistent with that caused by depth charges.However there is a possibility that the wreck may be the , which went missing in the North Sea in November 1944 and has never been found.