A roll film negative. On board the submarine Sealion (1959) towards the end of a long refit at Portsmouth. The photographer is in the officers' washplace between 69 and 74 stations on the port side of the main flat looking to port and down into water closet number 1 (noted as trap 1 by the photographer). A rack of electric cable passes through the cubicle above the W.C. against the boat's side. Three vertical link arms are fitted to the aft bulkhead and a hose nozzle is connected to a system of pipes and valves. A vertical format negative.