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 and down showing a double cupboard with a fire extinguisher by the side of it. A Kelvin Hughes visual display unit has been removed from its casing on top of the cupboard. A telephone is on the right.