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Russ Davis, a professor at the Scripps Institution of Oceanography, works on a Spray Glider in a test tank at the Monterey Bay Aquarium Research Institute.
These gliders can dive to depths of over 1,000 meters (0.62 mile), and can stay at sea for months at a time. Programmed at the surface, the gliders follow a roller-coaster path through the water, collecting data on temperature and salinity as they go. Each time they reach the surface, they send their data and location information back to shore stations via satellite. (Kim Fulton-Bennett, 2003 MBARI )