A roll film negative. On board the submarine Sealion (1959) towards the end of a long refit at Portsmouth. The photographer is in the radar office between 66 and 69 stations on the starboard side of the main flat looking inboard, forward and down showing a wireless circuits QYA (1) receiver on the left. A Kelvin Hughes visual display unit has been removed from its casing on top of a cupboard and below this receiver. A telephone and fire extinguisher are next to the door. A tilted vertical format negative.