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 auxiliary machinery compartment between 62 and 68 stations below the main flat looking forward from 65 station on the starboard side showing No. 2 battery cooling pump on the left and No. 2 telemotor pump in the centre with a C3B/1 salinometer indicator manufactured by W Crockatt & Sons Ltd of Glasgow against the forward bulkhead. On the right is the V1/1 low power rotary blower unit manufactured by Keith Blackman Ltd of London.