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 forward and up into the port inboard corner showing the Powquip teleprinter No. 1 on the right above other electrical units. To the right of the door are two Storno units and a lighting switch. A vertical format negative.