A roll film negative. On board the submarine Sealion (1959) towards the end of a long refit at Portsmouth. The photographer is in the control room between 59 and 69 stations on the main flat looking aft and slightly to port from the port side at 66 station showing the W/T mast control box, distribution boxes, fuse boxes, pipework and gauges against the bulkhead at 68 station. The doors to the officers' washplace W.Cs. are on the left. A vertical format negative.