A roll film negative. On board the submarine Sealion (1959) towards the end of a long refit at Portsmouth. The photographer is in the bunk space between 49 and 52 stations on the starboard side of the main flat looking aft and to starboard from 49½ station showing a two berth fixed bunk unit with the curtains drawn back. The top berth is numbered 44. Distribution box C4B is under the deckhead. A vertical format negative.