See mooring places, guest, and natural harbors on the nautical chart by following these steps:

1. Go to the "Plan" tab.
2. Click on map settings.
3. Under "Map Layers", turn on "Harbors".
4. Now you should be able to see guest and natural harbors on the nautical chart.

If you instead want to filter harbors, you can in the same "Plan" tab click on any filter under the search field. Then either all guest harbors or natural harbors will be displayed depending on the filter you choose.