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 torpedo compartment between 108 and 117 stations on the main flat looking forward from the port side at 109 station showing two fire extinguishers under a submerged signal ejector in the left foreground with a LEC refrigerator next to them. A ventilation fan unit and a wooden box are above the refrigerator. A three tier bunk unit is in the background. An automatic emergency lantern and two submerged signal ejector pyrotechnics emergency supply lockers D1 and D2 are on the right. A vertical format negative.