Race Scoring
Most races at AYC are scored using the Time on Time (TOT) scoring method. This scoring method has been found to be helpful when there is a very large handicap spread in a class or if the race conditions are "abnormal" (which is often the case around Fidalgo Island due to currents and localized wind conditions).
The following is a TOT conversion formula to convert the standard PHRF Time on Distance (TOD) handicap into a TOT Time Correction Factor (TCF).
TCF = A / (B + PHRF)
The denominator, B + PHRF, is the number of seconds it takes to sail a nautical mile in the expected conditions. Another way to look at it is that the denominator divided into 3600 is the average boat speed in knots. Here are some commonly used B factors:
Common B Factors
480 in heavy air or if the race is all downwind
550 in average conditions
600 in very light air or if the race is all upwind
The numerator, A, is merely a coefficient that makes a "nice" looking TCF. Select it so that the TCF for the middle of the fleet is about 1.000. The A coefficient has absolutely no effect on the corrected finish order. Changing it will only affect the various margins.
AYC races are typically scored using a B factor of 520 because it gives a slight advantage to the slower boats. In addition, since the average boat in the fleet has a PHRF TOD rating of approximately 130 (for example, a J27) using this B factor results in a TCF of one (1.00). As a result, the TCF formula for AYC is as follows:
AYC TCF = 650 / (520 + PHRF)
To get the corrected time, simply multiply the elapsed time by the TCF.
Note that TOT scoring is not a cure-all for all the inequities of handicapping. TOT scoring will not turn a fleet upside down. It usually does not affect the top boats. It usually moves the boats in the middle around a little. If the handicap spread in a class is large, it will tend to tighten things up a bit.