A roll film negative. On board the submarine Sealion (1959) towards the end of a long refit at Portsmouth. The photographer is in the air conditioning compartment below the main flat between 68 and 73 stations, looking forward, to starboard and down from near the starboard side at 70 station. The air conditioning plant starter panel is in the top right corner and the ship vent fan starter panel is next to it. Storage lockers are below these starter panels. A vertical format negative.