What do four short blasts mean on a boat? - Quora

Answer (1 of 5): Four short blasts don’t mean anything, because another boater might confuse it for three blasts or five blasts, which mean entirely different things. Below is per Boat US. Here is another link for the broader topic of Rules of the Road on water, per USCG. williamsburgchartersails

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Oregon State Marine Board : Sound Producing Devices : Boater Info : State of Oregon

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