Welcome to Thomas's Free Nautical Chart Viewer. This application displays nautical chart data from official U.S. government sources, such as NOAA and the Army Corps of Engineers, and other public sources, such as Open Street Map. It is intended to be a simple way to view any of these data sources in a single application, from any device.
⚠️ Important Navigation Warning
This application is NOT for navigation. Chart data may be outdated, incomplete, or contain errors. The creators of this application assume no liability for any use of this data.
Data Sources & Attribution
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NOAA Office of Coast Survey
Coastal and ocean ENC (Electronic Navigational Charts)
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U.S. Army Corps of Engineers
Inland waterway IENC and eHydro bathymetry surveys
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OpenStreetMap & Contributors
Base map and waterway routing data
This tool is provided free of charge with no warranties, express or implied. Data is sourced from publicly available U.S. government services and may be subject to their respective terms of use.