A roll film negative. On board the submarine Sealion (1959) towards the end of a long refit at Portsmouth. The photographer is in the junior rates mess between 34 and 44 stations on the main flat looking aft from 37 station on the centreline showing a triple tier bunk unit against the bulkhead at station 41. Folding tables and cushioned seats are on both side of the mess. A vertical format negative.