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 electronics maintenance room between 39 and 42 stations on the centreline of 1 deck looking into the port aft corner showing two dimmer units, a load unit control panel, an electric fire and a Thermotank air conditioning unit. A vertical format negative.