acoustic buoy

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Noun1.acoustic buoy - a buoy that can be heard (at night)acoustic buoy - a buoy that can be heard (at night)
bell buoy, gong buoy - a buoy with a bell on it
whistle buoy, whistling buoy - a buoy that makes a whistling noise
References in periodicals archive ?
org) today continued with its highly successful, $150,000 right whale acoustic buoy project, when 5 buoys were deployed into Cape Cod Bay, with the assistance of Cornell University and the Center for Coastal Studies (CCS).
With restricted vision, sailors must rely on acoustic buoys, and a unique sound system that changes signals when on starboard or port tack.
A key feature of Whale Alert is a display linking a system of near real-time acoustic buoys that listen for right whale calls to an iPad (or iPhone) on a ship's bridge showing the whale's presence to captains transiting the shipping lanes in and around Stellwagen Bank National Marine Sanctuary.