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 starboard from the walkway at 94 station showing lockers L43 and L44 with two small drawer units labelled 'Sagacard 3' with a key labelled 'LKR 3' and 'Spare gear' with key labelled 'LKR 4'. On the right is a unit marked 'auxiliary propulsion contactor' with another two small drawers above it. A vertical format negative.