On board the Type 12 frigate HMS Berwick (1959) alongside the south wall in No.3 basin at Chatham Dockyard, near the end of her modernization which commenced 4 December 1967 and completed 4 June 1971. The photographer is in the Hull Outfit 15 (Type 170B sonar) directing gear compartment between 10 and 12½ stations on 4 deck looking forward and to port showing the dome raising and lowering gear. A vertical format negative.