A roll film negative. On board the submarine Sealion (1959) towards the end of a long refit at Portsmouth. The photographer is in the auxiliary machinery space between 62 and 68 stations below the main flat looking to port and slightly aft into the aft corner showing an LP blower starter panel and an amplifier assembly Mk 132AA panel on the aft bulkhead and junction panel V1 on the port side of the boat. A vertical format negative.