On board the submarine Walrus (1959) alongside the fitting out berth at Scott's Shipbuilding & Engineering Co Ltd shipyard at Greenock, on the Clyde. The photographer is in the main generator room 'snake pit' between 77 and 81 stations below the main flat looking to starboard and aft from 80 station showing, on the left, the salinometer switch, the detector box, the control panel and the compressor motor starter panel for the C6/2 distilling plant No. 2. Four circular gauges are protected by a wire cage. In the right foreground is a handwheel marked "Lub. oil filling D.O.T. (Y1)".