A roll film negative. On board the Tribal class type 81 frigate Mohawk (1962) in Portsmouth Dockyard. She was in a dry dock from 21 March to 11 April 1972 when she moved to the South Railway Jetty. In the electronic transmitter room between 41 and 42 stations on the port side of 1 deck. The photographer is looking to starboard towards the doorway showing combination locked cupboards on the right and the main transmitter control units on the left. An automatic emergency lantern and a fire extinguisher are next to the door. A vertical format negative.