Currents can be treacherous and visibility is rarely more than 3-5 feet. This video is from a dive executed by Sea Ventures Divers from Fairfax, Virginia on the 3rd and 4th of July 2009. Sea Ventures is the only Scuba shop that regularly schedules trips to the sub.

U-1105 was a modified Type VII-C/41 German U-boat, which was built at the Nordseewerke Shipyard, Emden, Germany, and commissioned into the Kriegsmarine on 3 June 1944. Oberleutenant Hans-Joachim Schwarz was given command. He would command U-1105 for the duration of her German service.

Excerpts from Wikipedia
In 1946, redesignated U-1105, the U-boat arrived in Portsmouth, New Hampshire. The Naval Research Laboratory in Washington, D.C., and Massachusetts Institute of Technology's Acoustic Laboratory in Cambridge, Massachusetts, conducted research on its unique rubber-tiled skin. After the research was completed, the boat was towed to Solomon's Island, Maryland for explosives testing.

USS Salvager and USS Windlass were assigned to tow U-1105 into Chesapeake Bay where she was temporarily sunk. Salvage and towing tests were conducted from 10–25 August. Moored on 29 September to allow pontoons to be fixed to her sides, U-1105 underwent another series of salvage and towing tests until 18 November, when she was sunk off Point No Point Light and buoys were left to mark the spot.

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 250 lb. MK.6 depth charge was detonated 30 feet 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. Little evidence was left to mark the wreck, so for the next 36 years the submarine was lost to history.