A roll film negative. On board the submarine Sealion (1959) towards the end of a long refit at Portsmouth. The photographer is in the aft crew accommodation space between 103 and 117 stations on the main flat looking forward on the port side at 108 station showing a triple tier bunk unit on the left with the CO² absorption unit beyond it to the left of the watertight door, which leads into the motor room. A telephone is above the open watertight door. Kit lockers and the pipework and valves of the B.I.B.S. panel are on the right. A vertical format negative.