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 operations room between 41½ and 45½ stations on 1 deck. The photographer is looking aft from the centre of the room showing the RDD & D CTS JUA (2) command visual display unit with the main plotting tables beyond it. A navigation information board is above an Emcon policy board, both fixed to the side of a ventilation trunk, on the right.