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As a piece of a plane. but, it could be something as small as a seat cushion or a life vest. finding wreckage is like finding the needle in the hay stack. if only they could find the hay stack. >> that's a sonar buoy. >> correct. >> reporter: these devices are deployed in the indian ocean to monitor sounds and map the wind and ocean currents in hopes of narrowing down the search area. it has to fly in straight lines at 1,000 feet. at this height, a fishing boat can be obscured. this boat is about the same length as that piece of debris spotted on satellite. that could be missed, right in. >> a...
Source: archive.org