[AugustH]

I'm curious, do you have polars for all the boats out there, so you know what point of sail is fastest for a given boat? Some boats point high and still go fast, while other boats have to point lower to maintain a decent speed, and some can't point very well at all (cats come to mind here, that extra hull can help sometimes, hurt other times. But wow do they go fast!). If you don't take this into account, your app could lead to losing races if the driver tries to struggle upwind.

And do you also compute gybing angles?