A roll film negative. On board the submarine Sealion (1959) towards the end of a long refit at Portsmouth. The photographer is in the air conditioning compartment below the main flat between 68 and 73 stations, looking forward and to starboard from the port side showing cupboards, lockers, drawer units and worktops. A Royal Navy telephone directory is on the worktop. In the port forward corner are the action intercom amplifier C over the main intercom amplifier A and the main intercom amplifier B.