FriesNav
Offline sailing chart for the Frisian waters
Fully offline
The entire Frisian sailing area — lakes, Wadden Sea and IJsselmeer coast — works without internet after a one-time download.
Live position
Your GPS position on the chart. Your location stays on your device and is never sent or stored.
Depth zones
Colour-coded depth zones and depth figures, based on survey data from the Province of Fryslân.
Bridges & locks
Bridges, locks and their operating times — so you know where and when you can pass through.
Buoys & marinas
Buoys and beacons (including light characteristics), marinas and Marrekrite mooring sites.
Free & private
No account, no subscription, no ads and no tracking. Full stop.
Please note: FriesNav is an aid for recreational boating and must not be used as your sole means of navigation. Always consult official nautical charts, current notices to mariners and your own visual observation.