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 control room between 41 and 42¾ stations on the starboard side of 1 deck looking to starboard and aft showing the range console, the depth console, a gyro compass bearing unit and an asdic type 170B junction box against the ship's side. Against the aft bulkhead are a resistor box, a main starter, range retransmission units and an automatic emergency lantern. The sliding door to the operations room is on the right with a loudspeaker above it. The raised chair of the officer in charge is in the right foreground.