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 forward on the port side showing the gun direction officer's position on the extreme right. Against the forward bulkhead are the A/A co-ordination plot and tote board and three junction boxes. The Elliott Bros (London) Ltd T.I.U. (target indicating unit) Mark 5 cabinet C is on the left. A vertical format negative.