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 Category: Charting/Soundings/Electronic/ • High Resolution Photo Available
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