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 conversion machinery and radar power room between 31 and 35½ stations on the starboard side of 3 deck looking to port and forward showing two dual output machines and a director metadyne on the deck. Against the port bulkhead are two starter panels, a CO²· fire extinguisher and four voltage regulators. Against the forward bulkhead are a fuse panel and excitation units. An automatic emergency lantern and a telephone are fixed to the pillar in the foreground.