A roll film negative. On board the submarine Sealion (1959) towards the end of a long refit at Portsmouth. The photographer is in the control room between 59 and 69 stations looking aft and up from 64 station showing the deckhead above the main action console and the radar periscope. Six handwheels and two ON installation units with a clinometer between them are under the deckhead. The attack periscope cable drum is at the top of the picture. A vertical format negative.