The type 81 general purpose frigate HMS Zulu (1962) in No. 1 dry dock in Rosyth Dockyard during a lengthy refit which was completed in December 1974. The photographer is standing on the floor of the dock looking aft showing the port stabiliser fin between 55 and 56 stations in the working position. A man in white overalls is standing on a step ladder holding a three feet wooden scale stick against the leading edge of the fin. Diver's search lines are painted on the hull.