A roll film negative. On board the submarine Sealion (1959) towards the end of a long refit at Portsmouth. The photographer is in the gyro compass room between 65 and 68 stations below the main flat, looking up at the starboard side. A Plessey Dynamics static converter Mk. 7VC and an Admiralty gyro compass repeater panel are on the left and a periscope heated windows dual control unit is on the right. A desk with a hinged top is in the foreground. A vertical format negative.