“Echometre” record obtained by the French liner S.S. De Grasse when crossing over the head of a canyon on Georges Bank. Such records reinforced the view that vessels could navigate by using bathymetry. Accordingly, the United States Coast and Geodetic Survey embarked on a project to map the continental slopes and shelves to help guide mariners into United States ports.
Photo Category: Exploration - Maps
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| Added On | 18th October 2015 |
| Viewed | 4 viewed |