 In the summer of 1949 "U-1105" was raised again and towed into the Potomac River and anchored off Piney Point, Maryland for preparations for her final demolition.On 19 September 1949, a MK.6 depth charge was detonated from "U-1105".After being lifted out of the water, she went down one last time in more than 91 feet of water landing upright, her pressure hull cracked open by the explosion all the way around to the keel.