R/V Hakuho-maru Archives

Bathymetric maps obtained by each sounding at various survey speeds and modes. Each panel shows depth data distribution obtained along survey and transit lines; (a) east to west survey lines at 4 kt in electric thrust mode, (b) north to south survey lines at 4 kt in electric thrust mode, (c) transit lines at 8 kt in electric thrust mode, (d) transit lines at 15 kt in direct mechanical thrust mode. The contour interval is 20 m. The yellow contour shows water depth of 10,900 m. -- Scientific Data

Water Planet Recon: How Accurately Can We Measure Earth Ocean’s Deepest Point?

by Keith CowingSeptember 18, 2026September 18, 2026

[Research Organization of Information and Systems]. How deep is the deepest ocean—and how precisely can we actually measure it? Bathymetric maps obtained by each sounding at various survey speeds and […]

R/V Hakuho-maru

Water Planet Recon: How Accurately Can We Measure Earth Ocean’s Deepest Point?

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Water Planet Recon: How Accurately Can We Measure Earth Ocean’s Deepest Point?

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