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 passageway on 2 deck looking to starboard from 50 station showing an air conditioning air filtration unit and two engine room air supply vents. A cable stowage bracket is on the right. A vertical format negative.