Here is a video of the Inspection of a sunken boat. The boat sunk in Aug of 2017 in a place which is rather hard to access (about 35 km from the nearest mobile phone tower). Three passengers happily survived on the island which is in ~1 km from the point where the boat sunk.
After we ( http://podvodpoisk.ru ) inspected by sidescanning sonar about 3 square km we finally got a chance to check the points which looked suspicious by Trident ROV. The dive was done from the ice (about 1 m thick) and the depth was 13 m, of course it was totally dark on the bottom.
Finally the boat was taken from the bottom and I guess will be used again