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 machinery control room between 58½ and 61 stations on 2 deck looking into the starboard recess with the main engine and boiler control panel on the left and the forward bulkhead of the gas turbine downtake on the right. Mounted against the downtake bulkhead are pipes, valves and electrics concerned with the air distribution system. On the starboard bulkhead is the panel for the Minerva fire detection system. A vertical format negative.