Er is de afgelopen jaren ook al wat veranderd in de documentatie van de GPH:
2020:401.4 General Purpose Handicap (GPH) is an average representation of all time allowances used for simple comparisons between boats and possible class divisions. It is calculated as an average of the time allowances of 8 and 12 knots true wind speed for the Circular Random pre-selected course as defined in 402.4(b)
402.4 Pre-selected courses are:
b) Circular Random is a hypothetical course type in which the boat circumnavigates a circular island with the true wind direction held constant.
ORC Rating Systems 2020
WIND AVERAGING
The Circular Random and Non-Spinnaker selected courses are calculated applying a “wind averaging” operator that smooths the individual performance curves for each yacht, taking into account not only each considered wind speed as calculated by the VPP, but a normal distribution across the range that accounts for the 23.58% of the accounted wind speed, 19.8% for 2 kts above and below, 11.73 for +-4 kts, 4.89 for +-6 kts, and 1.79 for +-8 kts.
The wind averaging is not used for the constructed course method
ORC VPP Documentation 2020
2021:401.4 General Purpose Handicap (GPH) is an average representation of all time allowances used for simple comparisons between boats and possible class divisions.
ORC Rating Systems 2021
WIND AVERAGING
When calculating the GPH, the “wind averaging” operator is aplied to the all purpose course, that smooths the individual performance curves for each yacht, taking into account not only each considered wind speed as calculated by the VPP, but a normal distribution across the range that accounts for the 23.58% of the accounted wind speed, 19.8% for 2 kts above and below, 11.73 for +-4 kts, 4.89 for +-6 kts, and 1.79 for +-8 kts.
The wind averaging is not used for the constructed course method
ORC VPP Documentation 2021