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 main communication office between 32½ and 35 stations on the starboard side of 2 deck looking aft showing a telephone radio exchange unit against the starboard screen. Against the aft bulkhead are a full height cupboard fitted with a combination lock and a padlock and two CJD(1) receiver units. A vertical format negative.