I don't know .
I have plenty of area to play in . And im usually reaching like most people.
The only rules that I know and therefore go by is , power boats should give way and I should have right of way if my right hand is at the front .
Still doesn't make any difference when a kiter is coming straight at me and doesn't make it obvious that he is going to move .. I always give way and then get grumpy.
Never had that problem with another windsurfer .. don't get me started.
Anyways , this threads ideals was about incidents from sailors vs boats in the Swan river which I never had a problem ,
The only problem with me and a boat ever was crashing next to one while trying an even cooler , sharper , faster jibe .