Hi all,
I’m trying to set up a sailwave file to calculate a PH for all our sailors.
I’ve used RYA NHC as the scoring method.
Inserted a column for the new rating.
The problem I have is with 3rd and 4th place.
You can see in the image the finishing times are ranked in order but the new rating I’m getting out doesn’t make sense as the new rating for 4th place is 1142 but 3rd place has a rating of 1147.
Any thoughts on what I’m doing wrong?
Hi Hawkes - Welcome to the Sailwave User Group
Could you either share your file with me either here or via email jon@sailwave.com
One thing I need to check is if you have changed the rating for R1. I can see the default ratings are all the same but if you press F6 then R it will display the ratings.
I also need to know how many competitors are in the race to be able to comment
Jon
Hi,
Thank you for sharing the file. You have not done anything wrong - if you look at the spreadsheet below
which shows the calculations based on the NHC formula for R1 of the handicap fleet
All the PY ratings are converted to TCF for the calculations
You will notice that the 4th boat has been statistically determined to be extreme (outlier) which means that his rating is adjust according to a different formula
The formula is as per the RYA specification. The reasoning for having Extreme(Outlier) calculations is that typically if a boat is an outlier something unusual has happen e.g. the wind has died at the end of the race or maybe they ran aground. I this case their rating is adjusted by a smaller amout
I did try putting them close to the third boat
you then get the expected results
You can override the extreme (outlier) behaviour if you wish by setting the extreme calculations to be the same as the standard this is done by using an .ini file - if you search this forum you will find instructions for this. But bear in mind it is not using the NHC specification then
I hope that helps - If you have any questions please come back.
I as noticed you are not using the latest version of Sailwave. You need to upgrade if you are racing to the current Racing Rules of Sailing
Regards
Jon
That makes sense, thank you very much. The boats jib broke that race, but we do also have boats that finish as outliers due to level of ability. Will take a look at it and see when it should be applied and not.
