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 forward A/S metadyne compartment between 27 and 32 stations on 3 deck looking to starboard and forward from the port side showing various electronic units against the forward bulkhead, including one machine which has produced a long length of printout. One of the electrical units is drawn out for maintenance. The photographer's equipment bag is in the right foreground. A vertical format negative.