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 GWS 21 Seacat ready use missile magazine on 01 deck between 52½ and 54 stations looking to port from the starboard side. A watertight door is in the port bulkhead and a loudspeaker is on the aft bulkhead. A vertical format negative.