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PHRF-Lake Ontario
 

Time on Time

Time on Time

Time-on-Time scoring is not new. It has been widely used nationally and internationally as a valid method to score handicap yacht racing.

The most well known recent use of Time-on-Time was the PORTSMOUTH Handicap numbers, a predecessor to our own PHRF system, which for many years provided an easily implemented handicap system for local racing.

 

PHRF-LO currently recommends using the following A & B values
for calculating the Time on Time multiplier.

A= 566.431

B= 401.431

Formula = 566.431/(401.431+TOD)

Scratch Boat = 165 (ToT = 1.000)

Filters
Title Created Date Hits
Q: Is the .008 Q essentially adjusting the larger boats? 27 April 2009 Hits: 147
Q: Can we go back and change all the previous analysis? 27 April 2009 Hits: 169
Q: If someone is improving in their performance will their position change? 27 April 2009 Hits: 170
Q: Changes to the Q Factor will change the TOT Multiplier? 27 April 2009 Hits: 181
Q: Is this change intended to stop the big boats from winning? 27 April 2009 Hits: 194
Q: It appears that the faster boats are slowing down? 27 April 2009 Hits: 506
Q: How much does the Q change the relative handicap between boats? 27 April 2009 Hits: 472
Q: We still use Time on Distance Scoring. How will our ratings be affected? 27 April 2009 Hits: 165
Q: Our club is satisfied with the handicaps can we keep things the same? 27 April 2009 Hits: 424
Q: How will it affect the final scoring? 27 April 2009 Hits: 312
Q: So you are penalizing bigger boats? 27 April 2009 Hits: 1737
Q: Why should the Q be changed? 27 April 2009 Hits: 145
Q: Why has a Q of 0.008 been selected for 2009? 27 April 2009 Hits: 132
Q: Is "Q" constant? 27 April 2009 Hits: 373

Subcategories

FAQs on Q 16

History of Time on Time 5

History
At the inception of PHRF-Lake Ontario, Time-on-Time scoring was proposed and included in the PHRF-LO Charter.  Although Time-on-Time scoring is not new, Lake Ontario was, to the best of our knowledge, the first to implement it through PHRF handicapping. Subsequent to the initial inclusion, Charles Kramer of Sodus Bay Yacht Club, a PHRF-LO Handicapper, completed an analysis and derived the following formula based in part on his interpretation of the published results of the original H. Irving Pratt Ocean Race Handicapping project at M.I.T.  This formula was adopted by PHRF-LO in 1985 and represents an improvement over the conversion method that was initially used.

Q = .045
S = Scratch Boat = ASP 171
R = (8.36 x 106) ÷ ((ASP + 384.3)2)
RS = (8.36 x 106) ÷ ((171+ 384.3)2)
TOT = ((1 ÷ √RS + Q) ÷ ((1 ÷ √R) +Q))
or TOT = (685.411 ÷ (ASP + 514.411))

Time on Time Scoring 4