A roll film negative. On board the submarine Sealion (1959) towards the end of a long refit at Portsmouth. The photographer is in the motor room between 92 and 103 stations below the main flat looking slightly to starboard, aft and down from the centreline at 102 station showing pipes and handwheels against the aft bulkhead above the inner hull plating. The end of the starboard main motor is on the left. A vertical format negative.