Mike,
I looked it all up a while ago, after a massive disagreement at tacticat or something. And this is the way I remember it.
Maybe the rules have changed since then or I just remember it wrong. Anyway, everybody look for himself, I may be wrong on this.
Personally, in real life I make my turns quite soon, it is more sportive in that way.
Wouter
Perhaps this is a case where there is a difference between the RRS (as published by US Sailing) and the International rules (published by ISAF???). I'm not sure since I've only ever seen the US sailing book.
By the way, the rules are all available online at
www.ussailing.org Between that and UK Sails online rules quiz, you should be able to learn them without having to buy one of the explanation books.