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 and to port from 112 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. Against the forward bulkhead are a tube selection unit mark 4 model 1, a torpedo battery 6-way switch alarm unit, two distribution boxes, two supply panels, an automatic emergency lantern and two submerged signal ejector pyrotechnics emergency supply lockers D1 and D2. Two tables are in the foreground. A canvas is covering the torpedo hatch in the deckhead. A vertical format negative.