@AIFER
Good day,
I would first like to say that I am not part of the Windy team. So my answer commits only me.
Windy is above all a weather app, very useful at sea. But your request to integrate nautical chart information such as sounding depths and navigation aids, does not seem like a small addition to me. But hopefully Windy could, may be, accede to your request. In the meantime I would just suggest that you export the route plotted on one of your navigation software, in GPX format, and import it into Windy.
You say you spend tens of thousands of dollars for your navigation software, but do you pay more than the 18 euros annual subscription to Windy?
Concerning the forecast accuracy, it is important to note that Windy does not make weather predictions but only visualises forecast and actual data received from various weather centers, including the world's major weather forecast model providers such as ECMWF (European Centre for Medium-Range Weather Forecasts), GFS (NOAA), NEMS (MeteoBlue), Icon (DWD), etc.
Windy therefore has no control over the forecast or actual data provided and the issues regarding their accuracy.
Your example of imprecise forecast on the coasts of Croatia is a good case. On this very indented coast, bordered by mountains, the forecast of winds and coastal breezes is not easy. A very high resolution model would be needed, but this type of model is not available everywhere.
The models I mentioned above are offered in Windy on the Croatian coasts. Do you check them all? It seems to me that the NEMS 4 km model is interesting because it shows the effect of coastal breezes and provides more details in the wind field.
77F4A48E-137A-4153-95F1-DFBC2D74F269.jpeg
Shown with my customized wind color scale
You can try also ICON D2 with 2.2km resolution covering only a part of Croatia.
Good winds and safe navigation.