Sealion (1959). In the auxiliary machinery space between 62 and 68 stations below the main flat.

A roll film negative. On board the submarine Sealion (1959) towards the end of a long refit at Portsmouth. The photographer is in the auxiliary machinery space between 62 and 68 stations below the main flat looking forward and up at the starboard side of the bulkhead at 62 station showing two gauges which are labelled No. 1 pump casing pressure and No. 1 pump discharge pressure. Above them is a 10" x 6" battery vent fan No. 3.