On board the Type 81 general purpose frigate Eskimo (1961) berthed on the south side of No. 3 basin in Chatham Dockyard. The photographer is in the lobby between 67 and 68 stations on the starboard side of 3 deck looking to starboard, aft and up showing the sprinkler supply pipes and control valves under the deckhead for the mortar projectile compartment. The door to the projectile room is in the aft bulkhead. A vertical format negative.