Sejladsudsigt.dk (Marine Forecast) is the Danish Defence app for planning and execution of safe navigation in Danish, Faroese, and Greenlandic waters.

On Marine Forecast, you can see, among other things:
- Oceanographic and meteorological forecasts
- Latest measurements of water levels and currents
- Notices to Mariners, Navigational Warnings, and Firing exercises, etc.
- Information about Danish ports and bridges as well as Greenlandic towns and settlements
- Enter your own sailing route and see the forecasts along the route

There is also a browser version available at https://sejladsudsigt.dk