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Performance Handicap Racing Fleet AI simulator
(@Performance Handicap Racing Fleet_simulator)
Hub AI
Performance Handicap Racing Fleet AI simulator
(@Performance Handicap Racing Fleet_simulator)
Performance Handicap Racing Fleet
Performance Handicap Racing Fleet (PHRF) is a handicapping system used for yacht racing in North America. It allows dissimilar classes of sailboats to be raced against each other. The aim is to cancel out the inherent advantages and disadvantages of each class of boats, so that results reflect crew skill rather than equipment superiority.
PHRF is used mainly for larger sailboats (i.e., 7 meters and above). For dinghy racing, the Portsmouth yardstick handicapping system is more likely to be used.
The handicap number assigned to a class of yachts is based on the yacht's speed relative to a theoretical yacht with a rating of 0. A yacht's handicap, or rating, is the number of seconds per mile traveled that the yacht in question should be behind the theoretical yacht. Most boats have a positive PHRF rating, but some very fast boats have a negative PHRF rating. If Boat A has a PHRF rating of 15 and Boat B has a rating of 30 and they compete on a 1 mile course, Boat A should finish approximately 15 seconds in front of Boat B. Results are adjusted for handicap by the race committee after all competitors have finished.
A variant of PHRF racing is called a pursuit race, commonly referred to as a reverse handicap, where boats start in reverse PHRF order with the starting times staggered based on the PHRF ratings. In theory, all boats will arrive at the finish line at the same time, which can make for an exciting finish. This means that the boats cross the finish line in order of placement in the race.
PHRF handicaps are assigned by individuals or committees associated with specific fleets. Handicaps are assigned to a given production class considering predominant local conditions and the handicapper’s experience in handicapping similar boats. These ratings are based on observed performance and any requisite adjustments generally become evident after 5-10 races have been sailed. Scoring options include Time-on-Distance or Time-on-Time.
While handicaps are assigned locally, US Sailing provides certain standards and guidelines to maintain a degree of consistency between fleets. Additionally, as a member benefit, US Sailing develops the PHRF Fleet Handicap Book– a compilation of yacht base handicaps by class from more than 60 PHRF Fleets throughout North America listing over 5000 classes. The Offshore Office also offers administrative and handicapping services to participating PHRF Fleets. The term “Performance Handicap Racing Fleet (PHRF)” is protected by copyright for use by US Sailing and sanctioned regional fleets.
Each region has its own variation on PHRF rules and ratings, based on local conditions. Here is an example of the Northern California PHRF Base Rating Report SAMPLE, the base rating is listed by boat in alphabetical order. The following is a sample of the Northern California rules for determining PHRF SAMPLE.
If a class of yachts is strongly outperforming their assigned rating, the PHRF committee of a region can adjust the handicap as they see appropriate. Hence PHRF is an observational rule as opposed to the IMS pure measurement rule. This prevents classes of yacht within a region from obtaining mistakenly favorable PHRF ratings and compromising the competitive nature of a fleet. All regions have slightly differing procedures for making changes but all have the same objective - keeping the racing fair for all.
Performance Handicap Racing Fleet
Performance Handicap Racing Fleet (PHRF) is a handicapping system used for yacht racing in North America. It allows dissimilar classes of sailboats to be raced against each other. The aim is to cancel out the inherent advantages and disadvantages of each class of boats, so that results reflect crew skill rather than equipment superiority.
PHRF is used mainly for larger sailboats (i.e., 7 meters and above). For dinghy racing, the Portsmouth yardstick handicapping system is more likely to be used.
The handicap number assigned to a class of yachts is based on the yacht's speed relative to a theoretical yacht with a rating of 0. A yacht's handicap, or rating, is the number of seconds per mile traveled that the yacht in question should be behind the theoretical yacht. Most boats have a positive PHRF rating, but some very fast boats have a negative PHRF rating. If Boat A has a PHRF rating of 15 and Boat B has a rating of 30 and they compete on a 1 mile course, Boat A should finish approximately 15 seconds in front of Boat B. Results are adjusted for handicap by the race committee after all competitors have finished.
A variant of PHRF racing is called a pursuit race, commonly referred to as a reverse handicap, where boats start in reverse PHRF order with the starting times staggered based on the PHRF ratings. In theory, all boats will arrive at the finish line at the same time, which can make for an exciting finish. This means that the boats cross the finish line in order of placement in the race.
PHRF handicaps are assigned by individuals or committees associated with specific fleets. Handicaps are assigned to a given production class considering predominant local conditions and the handicapper’s experience in handicapping similar boats. These ratings are based on observed performance and any requisite adjustments generally become evident after 5-10 races have been sailed. Scoring options include Time-on-Distance or Time-on-Time.
While handicaps are assigned locally, US Sailing provides certain standards and guidelines to maintain a degree of consistency between fleets. Additionally, as a member benefit, US Sailing develops the PHRF Fleet Handicap Book– a compilation of yacht base handicaps by class from more than 60 PHRF Fleets throughout North America listing over 5000 classes. The Offshore Office also offers administrative and handicapping services to participating PHRF Fleets. The term “Performance Handicap Racing Fleet (PHRF)” is protected by copyright for use by US Sailing and sanctioned regional fleets.
Each region has its own variation on PHRF rules and ratings, based on local conditions. Here is an example of the Northern California PHRF Base Rating Report SAMPLE, the base rating is listed by boat in alphabetical order. The following is a sample of the Northern California rules for determining PHRF SAMPLE.
If a class of yachts is strongly outperforming their assigned rating, the PHRF committee of a region can adjust the handicap as they see appropriate. Hence PHRF is an observational rule as opposed to the IMS pure measurement rule. This prevents classes of yacht within a region from obtaining mistakenly favorable PHRF ratings and compromising the competitive nature of a fleet. All regions have slightly differing procedures for making changes but all have the same objective - keeping the racing fair for all.
