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 looking forward from the centreline at 28 station on the roof of the bridge showing the top of the 4.5 inch gun turret and the forecastle. The supply and exhaust vents abaft the forward breakwater are open and air receiver pipes and cowls are fitted over the diesel generator compartment just abaft 6 station on either side of the steam capstan. A vertical format negative.