A 2¼ square film negative. The Type 12 frigate Yarmouth (1959) in a dry dock in Portsmouth Dockyard. A very close view of three discharge holes between 47 and 49 stations on the starboard side, taken from the bottom of the dock. The top left hole is the 3 inch diameter aft evaporator blow-down between 48 and 49 stations. The top right hole is the 3 inch diameter forward evaporator blow-down between 47 and 48 stations. The hole on the right edge is the 5½ inch diameter aft evaporator circulating discharge between 47 and 48 stations.