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 forward from 61 station showing the Laurence Scott & Electromotors T.C.C. Mk 17 Model 0 unit on the right. behind the ladder leading up to the conning tower. To the left of the passage is the torpedo tube action state panel with the main motor grouper tele transmitter receiver and the sonat type 2007 bearing indicator unit below it. The sound room is on the right of the passage and the forward crew accommodation is beyond the curtain. A vertical format negative.