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 electrical maintenance room between 34 and 39 stations on the port side of 2 deck looking aft from forward. A workbench with shelves and cupboards above is against the ship's side. A chest of drawers labelled P, Q, R and S are on the left with a key cupboard above them. A sign about radioactive valves is on the extreme left. A vertical format negative.