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 MRS3 maintenance and type 978 office between 46½ and 48 stations to port of the centre line on 01 deck. The photographer is looking aft from the forward end showing equipment labelled as R.D.D. & D. CTS, including a bearing resolver outfit, distribution panel, fuse panel, retransmitter data bearing and control amplifier boxes. A vertical format negative.