On board the Type 81 general purpose frigate Eskimo (1961) in No. 3 basin in Chatham Dockyard during her 1971-1974 modernisation. The photographer is in the sonar instrument compartment between16 and 28 stations on 3 deck looking forward and to starboard and from 23 station on the port side showing a hoisting winch and the cover over the watertight hatch in the foreground. Asdic type 162 boxes are against the ship's side. Standard cabinets No.1 and No. 2 containing electronic test units are against the forward bulkhead. A vertical format negative.