A roll film negative. On board the submarine Sealion (1959) towards the end of a long refit at Portsmouth. The photographer is in the wireless telegraphy office between 69 and 72½ stations on the starboard side of the main flat looking to starboard and up into the forward outboard corner. On the left above the Powquip teleprinter No. 2 is a wireless circuits antenna exchange and indicator unit numbered 115 with a frequency converter next to it. A wireless circuits power supply unit, three power points and two telephone jack boxes are against the boat's side.