Looking north-west-by-west from north-west corner of the roof of No. 1 Boiler Shop showing cranes by Numbers 5 and 6 dry docks in Chatham Dockyard. The Nuclear Office Building is on the right of the picture and the upper floors of the Nuclear Power Building are in the foreground beyond the ridge of the Factory roof. In the background is the River Medway with Upnor on its west bank and Upnor Castle in the right background.