On board the Type 12 general purpose frigate Plymouth (1959) alongside the south side of number 3 basin in Chatham Dockyard at the end of a modernization which commenced in August 1966. The ship is berthed starboard side to the quay. The photographer is in the operations room between 31½ and 35½ stations on 1 deck looking aft on the starboard side showing an Admiralty Research Laboratory plotting table and console with a tape type repeater under the deckhead. An electric fire, a clock, a recorder unit and a transmitter/receiver/loudspeaker control panel are against the bulkhead.