HMS K17 Submarine
K17 was sunk on 31 January 1918 during the night time fleet exercises later known as the Battle of May Island when she was attached to the 13th Submarine Flotilla. HMS Fearless ploughed into K17 at the head of a line of submarines. It now sits broken in two in around 54 meters.
Here’s a couple of videos of the dive, one by me and the other by Peter Keelan. We cross paths near the props.