Cadets of the Halstead Boys Naval Brigade unit at Gosfield Lake, near Halstead, Essex. Nine of the cadets are standing to attention on a wooden jetty and one of the female instructors is just visible behind them. A cadet is standing on the end of the jetty ready to assist a boat holding five cadets and another of the female instructors. It is being rowed towards the jetty by two of the boys and the bow in the bow is getting ready with a boathook.