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 on the top of the hangar to port of the centreline looking aft and slightly to starboard showing the flight deck between 58 and 71 stations on 1 deck. Two seamen are working on the starboard flight deck extension and a group of seamen are by the quartermaster's position near the Mark 10 Limbo mortar. Two dockyard mateys are boarding across the brow.