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 to starboard at the aft end of the compartment. Mounted on the bulkhead of the gas turbine downtake are a desk with telephones, a switchboard and an intercom above and to the side of it. A steam turbine register is on the desk. A watertight escape scuttle is in the deck. A vertical format negative.