Robert Williams with first Fessenden oscillator on the tug Susie D.
First successful test of sonic system.
Looking for icebergs but also found bottom
Image ID: theb2146, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Location: North Atlantic
Photo Date: 1914
Credit: NOAA Central Library
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of the U.S. Department of Commerce, National Oceanic & Atmospheric
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July 7, 2015