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 4.5 inch magazine between 23 and 27 stations on 4 deck looking to port from the centre of the compartment showing bottle racks for cartridges, a space for the stowage of A/S mortar propellant charges and the cartridge hoist. A vertical format negative.