Digital Library Search
Description
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 credit: NOAA Central Library)
Credit
NOAA Central Library
Display Date
1914
Location
North Atlantic
Collection
Historic Coast & Geodetic Survey
Nautical Charting
Soundings
Acoustic Sound Systems
Keywords
Charting
Soundings
Electronic