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 to port from 109 station showing the submerged signal ejector with two fire extinguishers below it. A sink is on the left and a locker marked C containing 3 canisters of oxygen candle ignition cartridges is next to it. A vertical format negative.