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 from the centreline at 105 station showing two triple tier bunk units. Against the boat's side is a distribution box CSD and a box marked A60 A/3/2 above two lockers and a panel covering the escape tower portable drain. A vertical format negative.