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 combined radar office between 36½ and 41 stations on the port side of 2 deck looking to port showing two radar data distributing and displays cabinets for type 993 radar, a visual display unit and a power supply unit. A vertical format negative.