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A nautical term, used in sailing when tacking (also called coming about). The helmsman first signals the intent to tack by shouting, "Ready about!" When the crew responds, "Ready," then the helmsman will signal that he or she is beginning to come about by shouting, "Helm's alee!"
I heard the helmsman shout, "Helm's alee," and I released the mainsheet.
by cathbath August 14, 2011