I use Windy for sailing (currently crossing Indian Ocean). There are several things I find problematic with Distance & Planning:
- Map and data are synchonised only when time cursor is clicked and held down. If you let go the time cursor the display is confusing.
- Are you building a weather-routing tool for yachts? Some commenters think you are and want to see polars or some kind of sail performance built in. IMHO this is an entirely different tool to what you have now and requires a focus on weather as seen subjectively by the boat at a selected time and place, along a precalculated and optimized route. There are several apps that try to do this and they all incorporate those two phases: route calculation and then subjective weather along that route.
- Assuming that you restrict Windy to displaying forecast along a manually defined route, and assuming that you provide some means of specifying the speed, then it would reduce confusion to lock the time and distance together so that as the time cursor is moved both the map and data table change in sync.