A roll film negative. On board the submarine Sealion (1959) towards the end of a long refit at Portsmouth. The photographer is in the wireless telegraphy office between 69 and 72½ stations on the starboard side of the main flat looking aft and down into the port inboard corner showing a stack of Racal 3.5 Kv units. A junction box, a lighting switch and a urinal are on the right. The urinal is partially obscured by the photographer's number 256 resting on it. A vertical format negative.