A roll film negative. On board the submarine Sealion (1959) towards the end of a long refit at Portsmouth. The photographer is in the forward torpedo compartment looking to starboard and up from the centreline between 29 and 30 stations showing close detail of the bottle screws on the upper torpedo reload rack. The vertical bar in the centre is marked 'No. 4 starbd top'. Under the deckhead are boxes marked B.U. 6 short and panels marked S.E.I.E. 8, S.E.I.E. 6 and S.E.I.E. 4. A vertical format negative.