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 and to starboard on the port side showing the gun direction officer's position in the foreground. Against the forward bulkhead are four junction boxes, a fuse panel, a circular change over switch and an HRL (Harvard Robotics Laboratory) gun director unit. A distribution box, a fire extinguisher and a Powquip teleprinter are on the right.