A roll film negative. On board the submarine Sealion (1959) towards the end of a long refit at Portsmouth. The photographer is in the wardroom passage between 49 and 56¼ stations on the main flat looking aft from 52 station. The wardroom is on the left. The pantry and number 2 battery switchboard are on the right. Various panels and breakers, including internal communications junction box 1, are against the aft bulkhead. A vertical format negative.