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 diving gear store between 46 and 47½ stations on the starboard side of 1 deck looking to port showing the work bench fitted with a vice and with drawers below on the left. Above the bench is the air bottle recharging plant. Against the port bulkhead are two oxygen bottles, two S.D.D.E. (surface demand diving equipment) cabinets and a filter unit. An electric fire is on the right. A vertical format negative.