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 port side of 01 deck looking aft and slightly to port showing the 3 inch Mark 4 Knebworth-Corvus rocket launcher at 35 station with a 2 inch rocket flare launcher mounted above it. Abaft it is the single 20mm oerlikon gun. The 25 feet motor cutter davits are empty. A vertical format negative.