Open Waters is an open-source marine navigation app. It provides essential navigation features for sailors, boaters, and water lovers, with a focus on usability, reliability, and extensibility.
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Charts — Browse and install nautical charts, add custom sources, offline MBTiles support
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Tracks — Record the vessel's path, display on the chart, export as GPX
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Markers — Drop pins, name and color-code them, navigate with live bearing and distance
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Routes — Multi-leg route planning with automatic waypoint advancement and ETA
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Import — Import markers, routes, and tracks from GPX files, Garmin/Navionics exports
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Instruments — Connect to onboard instruments via Signal K or NMEA 0183
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Roadmap — Feature roadmap and priorities