Concordia...41
07-09-2007, 08:06 PM
I'm used to the PHRF system where the difference in numbers = seconds per mile.
Looking at the scratch sheet for the Chicago - Mac, the numbers range from 1.033 to 1.267
Also, each boat has two ratings - an "All Purpose" and a "Mainly Downwind." I'm guessing the race organizers announce which one is going to be used.
The US Sailing website has this, which I don't find particularly helpful.
The ORR is a Sophisticated Yet Simple-to-use Scoring System -
The formula for calculating ORR Corrected Time = (A x elapsed time) - (B x distance). The factors A & B are listed on the ORR certificate and are different for each course. This easy-to-use formula is actually a clever simplification of the full IMS scoring solution. Scorers and race organizers will find the calculation of corrected times simple and easily done either by calculator or a computer spreadsheet program. Similarly, owners and tacticians can calculate corrected times positions while on the racecourse. For large events custom Excel spreadsheets can be generated and distributed to competitors allowing for on the water comparisons of their position with regard to other boats.
Can someone tell me how to do the time / distance (333 miles) calculations? :confused:
Looking at the scratch sheet for the Chicago - Mac, the numbers range from 1.033 to 1.267
Also, each boat has two ratings - an "All Purpose" and a "Mainly Downwind." I'm guessing the race organizers announce which one is going to be used.
The US Sailing website has this, which I don't find particularly helpful.
The ORR is a Sophisticated Yet Simple-to-use Scoring System -
The formula for calculating ORR Corrected Time = (A x elapsed time) - (B x distance). The factors A & B are listed on the ORR certificate and are different for each course. This easy-to-use formula is actually a clever simplification of the full IMS scoring solution. Scorers and race organizers will find the calculation of corrected times simple and easily done either by calculator or a computer spreadsheet program. Similarly, owners and tacticians can calculate corrected times positions while on the racecourse. For large events custom Excel spreadsheets can be generated and distributed to competitors allowing for on the water comparisons of their position with regard to other boats.
Can someone tell me how to do the time / distance (333 miles) calculations? :confused: