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 port from 80 station showing a pair of Vokes of Guildford Lub. oil filters next to a tank capacity gauge. Above the filters is an handwheel marked "Lub.oil to port eng. (A3)". Four circular gauges are mounted on a board on the left. The Drysdale centrifugal ballast pump marked V2/3 is on the right.