Hi, Gordon:
Thank you for the enlightenment. Perhaps the editor can add your explanations in the next issue? Meanwhile, I will add a link to your fine explanation to my posted version of the article at http://www.wayfarer-international.org/WIT/race.related/RacingRulesOfSailing/09-12RRS_summary_Al.html
Best wishes for happy, exciting sailing in 2009!
Uncle Al (W3854)