pl23_theb3791.jpg
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https://www.noaa.gov/media/digital-library-photo/pl23theb3791jpgDescription
Robert Peary North Pole Expedition.Sounding with piano wire through the ice.Profile of soundings tends to corroborate that Peary made it to the North Pole.
Credit
National Geographic Magazine, September 1988
Display Date
1909
Location
Arctic Ocean Photo
Collection
Historic Coast & Geodetic Survey
Nautical Charting
Bathymetry - Mapping the Features
Pre-1920
Keywords
Charting
Soundings
Bathymetry
Mechanical