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Pre 1920
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Coast Geodetic Survey
Nautical Charting
Bathymetry Mapping the Features
Pre-1920
Bathymetry Mapping the Features
Soledad and Los Coronados Canyons.Soledad Canyon is known today as La Jolla Canyon
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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.
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Bathymetric map of the World's oceans.Produced by Sir John Murray
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North Atlantic Ocean showing clear delineation of Mid-Atlantic Ridge.Detail of Sir John Murray map
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Pair of piano wire sounding machines on the PATTERSON.
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Steam sounding machine on the GEDNEY.
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Sounding operations on the PATTERSON.
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Sounding machine - detail view.On the PATTERSON
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First track of sonic range finder on USS STEWART.Crossed north Atlantic with sonic sounding device.Made approximately 900 soundings from United States to Gibraltar
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Temperature contours showing continuity of Mid-Atlantic Ridge.From Atlas of the METEOR Expedition.Combining sparse depth readings and temperature to infer bathymetry
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A hand sounding machine.On the EXPLORER
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Installation of deepsea sounding equipment.C&GS; 1931 Hydrographic Manual
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LL type wireline sounding machine.C&GS; 1942 Hydrographic Manual
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