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 CCR (RX) (communications control room (receiving)) between 25 and 28 stations on the port side of 2 deck looking to port and aft showing a frequency cabinet in the foreground with a desk next to it. On the desk are a telephone and an interphone control box. A chart at the back of desk shows the CCR transmitter section and the CCR receiver section.