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 to port, forward and up from 60 station. An action intercom loudspeaker is against the port side of the boat on the left with a main intercom loudspeaker to the right of it. A plotting intercom headset connection socket box with a headset is under the deckhead. In the lower right is the top of the torpedo tube action state panel.