The ISAF World Sailing Rankings for Olympic Classes are administered by the ISAF. Every year in November the ISAF Rankings Sub-Committee meet to review the method of calculation of the Rankings and to grade events to be included in the Rankings.
Each competitor counts his or her best six results over the previous 12 months. The one year period is calculated on a rolling basis (from today's date to the same date one year previously). Of those six results, a competitor may only count three results from the ISAF Sailing World Cup.
Regattas meeting the criteria are awarded a grade by the Sail Rankings Sub-committee. The grades are either a 200-point event, 100-point event or a 50-point event. The ISAF Sailing World Cup regattas, ISAF Sailing World Championships and Olympic Class World Championships are typically 200-point events. Olympic Class World Championships (not compliant with 200-point criteria), continental championships (not held as part of a 200-point event) and other major international events using Olympic equipment are 100-point events.
Complete information about the Criteria for Ranked Events is defined in ISAF Regulation 27.1.
85% of competitors at a regatta receive ranking points with first place receiving 200, 100 or 50 points depending on the grade. The competitor with the highest total from six events is listed first in the rankings and so on.
The ISAF Sailing World Rankings are issued approximately nine times a year.
Ranking Points are calculated using the following method
Ranking Points = E(N-P+1)/N
E = Event Rank
N = Number of Entries
P = Position in regatta