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 and slightly forward from 80 station showing a small electric motor on the deck. Four circular gauges are mounted on a board, one of them being marked "O.F. pump discharge", and to the right is a Vokes of Guildford filter unit next to a tank capacity gauge. Above the gauge is an handwheel marked "Lub.oil to port eng. (A3)". Under the deckhead is a fuse and switch panel with two switches marked off, low, med and high. A vertical format negative.