Watching the parametric sonar data in real-time as the vessel crosses over a valley, which is just becoming visible at right.
Parametric Sonar Data
Image courtesy of Paleolandscapes and the ca. 8,000 BP Shoreline of the Gulf of Mexico Outer Continental Shelf. Download larger version (jpg, 5.8 MB).

Watching the parametric sonar data in real-time as the vessel crosses over a valley, which is just becoming visible at right.

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