Pretty sure I read somewhere on here that it was 10.9 knots. Could be wrong, but it does seem to work for me. BTW, doesn't one of the supermods include a "range at current speed" button? TMO? Maybe RFB? Can't remember, but I know I've seen one somewhere. You could use that to find out, maybe.
Gonna keep an eye on this one, I'd like to know for sure too.
