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 torpedo compartment between 108 and 117 stations on the main flat looking forward and to starboard from 110 station showing a locker labelled S.E.I.E (submerged escape immersion equipment) 20 on the right. A berth and a table are in the foreground. A tube selection unit Mk. 4 model 1 manufactured by Laurence Scott Electromotors Ltd and a 6-way switch panel are against the forward bulkhead and a Mark 80 control panel is in the corner. A Smith's Astral wall clock is showing the time as 6.35. A vertical format negative.