An auto-detection whale buoy is deployed off Boston. The surface buoy
at right remains above the waves. An anchor will pull the subsurface
flotation sphere (left) down to 10 to 20 meters beneath the surface,
where it will hold up a lower mooring line that holds a hydrophone to
record sounds in the ocean, including whale calls.
(Matthew Barton, Woods Hole Oceanographic Institution)[back]
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