Cadets of the Halstead Boys Naval Brigade Unit in a boat on Gosfield Lake, near Halstead, Essex. Four of the cadets are sitting in a double-ended, clinker-built boat by a wooden jetty and two of the boys are holding tossed oars. A female instructor is sitting in the stern of the boat. Two cadets, one with a boathook, are on the jetty. The negative is scratched at the bottom.