Daily press review with marine general thematic
Tuesday, June 20, 2017
First nautical chart designed for bathymetric navigation
In 1939, Coast Survey published the first chart designed for bathymetric navigation.
Chart 5101A uses 50-fathom depth curves and fewer numerical depths.
The resulting product brings out steep slopes and broad plateaus of the bottom topography
zoom on chart
18740 nautical raster chart
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