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 forward and down into the starboard forward corner at 62 station showing an electric motor and above it is an handwheel marked L.P. blower discharge. A steel ladder leading up to the control room is on the right. A vertical format negative.