Office of Coast Survey
National Oceanic and Atmospheric Administration
U.S. Department of Commerce

Find Nautical Charts

Office Coast Survey

We are the nation’s nautical chart-maker. We are responsible for upgrading charts, surveying the seafloor, responding to maritime emergencies, and searching for underwater obstructions that pose a danger to navigation.

Highlights

What’s the difference between an ENC and an RNC?

What’s the difference between an ENC and an RNC?

Raster Navigational Chart (RNC)
Electronic Navigational Chart (ENC)

Find out at the RNC - ENC Comparison webpage

Announcements

Blog

Revised: 11/15/2017