A roll film negative. On board the submarine Sealion (1959) towards the end of a long refit at Portsmouth. The photographer is in the motor room between 92 and 103 stations on the main flat looking to port and down at the port side between 95 and 96 stations from the walkway. On the left are a fire extinguisher and two distribution panels. On flexible mountings is a motor generator and on the right is a fuse panel. A vertical format negative.