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 to port and forward from the port side at 110 station showing a wooden box and a ventilation fan unit on top of a LEC refrigerator with two fire extinguishers next to the refrigerator. A control box for the submerged signal ejector is above the fan unit and two BU6 Short boxes are next to it. The lower part of the submerged signal ejector Mark 2 is on the left. A vertical format negative.