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. The Gemini outboard motor in its run-up position on the bulkhead at 52 station on the port side of 01 deck, between the doors of the GWS 21 seacat missile ready use magazine. The photographer is looking aft and to starboard. A vertical format negative.