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 up into water closet number 1 (noted as trap 1 by the photographer). Racks of electric cable pass through the cubicle against the boat's side. A vertical format negative.