To further explain, if boats are coming from two different directions to the same mark there is no visible overlap but one boat will be in the 3 boat length zone first, that boat then has all the rights and sets the length of the 3 boat zone. It is a very good rule change it allows different size boats the safety needed on the course. If a 8ft BIC open with a small kid comes to the mark from an odd direction against a whole fleet of F18's but is rounding the mark the correct way. The mark rights circle will be 24ft and everyone must give that boat rights. But if the F18 gets to 54ft before the BIC gets to 24ft then the F18 has the rights. I'm obviously quoting an improbable race scenario here so don't jump on me I'm just trying to get the new rule accross