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 amplifier compartment between 34 and 35½ stations on the port side of 2 deck looking to port showing a GWS printout case on a bench in the left foreground with an amplifier cabinet beyond it. A junction box with the front cover removed is against the port side. An amplifier cabinet and a transformer are against the forward bulkhead. Two wooden boxes are on the deck. A vertical format negative.