An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock ( ) or https://
means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Dataset Last Updated: November 17, 2020 at 12:00 AM
Bathymetric data were collected using a boat-mounted Wide Area Augmentation System (WAAS),
a type of differential global positioning system, echo depth-sounding equipment, and computer
software....