Digital Library Search
Description
Using a hydrographic sextant to position an offshore rock.
Collection
America's Coastlines
Northeast Coast
Keywords
Coastline
Northeast Rhode Island
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.