Brief explanation of the A and B fleet. First race the fleets are divided by random drawing into A and B fleets. Teams in each fleet are scored 1-10. Top 5 from each fleet go to A fleet, bottom 5 go to B fleet.

From that point forward A fleet boats are scored 1-10, B fleet boats are scored 11-20. To get to A fleet you must finish 1-3 in B fleet. You get dropped from A fleet if you finish 8-10.

The idea is the top sailors spend more time sailing against each other.