The County class guided missile destroyer London (1961) in a dry dock at the Neptune Works of Swan, Hunter & Wigham Richardson Ltd at Wallsend-on-Tyne. The photographer is standing on the floor of the dock looking to port showing the starboard propeller shaft swell and eddy plate between 143 and 157 stations. A man in overalls is on the shaft holding a small scale stick vertically against the shaft. Another man is on a ladder holding a long scale stick against the shaft swell. Draught marks are painted on the hull.