A 35mm roll film negative. On board the Rothesay class type 12 frigate Rhyl (1959) in Devonport Dockyard. In the amplifier and S.R.E. compartment on 01 deck between stations 40 and 41¾. The photographer is looking forward and to starboard from the doorway showing eight transformers on the left. A fan ventilation unit is on the starboard bulkhead. The photograph was taken prior to 9 May 1972. A vertical format negative.