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 hull outfit 15 directing gear compartment between 16 and 24 stations on 4 deck looking forward and to port showing an electric fire, an asdic type 185 junction box, two other junction boxes and a telephone against the ship's port side. The sonar type 170 dome gear is on the right. A vertical format negative.