A roll film negative. On board the submarine Sealion (1959) towards the end of a long refit at Portsmouth. The photographer is in the aft crew accommodation space between 103 and 117 stations on the main flat looking to starboard and aft from the centreline at 105 station showing the top two bunks of a triple tier bunk unit. Against the boat's side are a distribution box CSD and a box marked A60 A/3/2 above two lockers and a panel covering the escape tower portable drain. Above the end of the top bunk is junction box C6A and on the right is a red cross locker.