That's my understanding as well, the rule was designed to stop people coming into the zone and tacking, because of how often it causes collisions.I believe this is how the rules are designed to discourage people from charging in on port, tacking and causing mayhem!
Whilst it's a good educational tool, there are several mistakes in their rule interpretations at least in the medium levels. They need to get those issues straightened up.This educational sailing rules game is brilliant: http://game.finckh.net/indexe.htm
I thought you were referring to the discussion above. I checked out the game link...there are no images coming up...am I missing something?This educational sailing rules game is brilliant: http://game.finckh.net/indexe.htm