NGA Explains: What is Hydrography? (Episode 4)

Uploader: National Geospatial-Intelligence Agency

Original upload date: Wed, 07 Nov 2018 00:00:00 GMT

Archive date: Mon, 29 Nov 2021 10:37:46 GMT

With less than five percent of the Earth’s oceans explored, we rely on the study of hydrography to help ensure safety of navigation. Don’t know what hydrography is or does? No worries, in this episode
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