 Dave Fratantoni (left), an associate scientist in the WHOI Physical Oceanography Department, bangs on a pipe near the recorder-equipped gliders to introduce an impulsive sound that helps synchronize the recorders' internal clocks as engineer Paul Fucile looks on. Fucile is a research engineer in the WHOI Physical Oceanography Department. (Photo courtesy Mark Baumgartner, Woods Hole Oceanographic Institution)[back]
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