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 main circulating inlet in the hull between 59 and 60 stations. A man in white overalls is holding a three feet scale stick is alongside the inlet. Diver's search lines are painted on the hull.