NHC running across multiple series

guy.mcbride · 3 May 2016 15:39

We have various series through the year and, indeed, a main series every year. I understand that NHC keeps running and that you do not reset to ‘base number’ within a club at the start of each series (or even start of each year). Some of series have only have a subset of our total membership attend them. Empirically, I have discovered that the ‘Default CR’ number entered into Sailwave is used for each calculation of the used CR for every race (I guess this ‘normalizes’ the CRs to some sort of anchor). I also notice that the total number of ‘known boats’ affects the CR for each race. If I just use the boats that attended a series for the calculation I get different race CRs than if I use the full set of boats but with many as DNC for the whole series.

So what is the correct way to start a series?:

Always use the Base CR (from RYA) in the CR column of sailwave and then ‘fix’ the CR of the first race to be the calculated ‘Next Race CR’ from the previous series.
Use the calculated ‘Next Race CR’ from the previous series in the CR column.

In order to keep a ‘full’ club CR going is it best to keep a master file of all results for all series and keep setting the CR for individual races in individual series from this?

Finally, I’ve seen hints that Sailwave can include ‘Next Race CR’ in the published results. I am too stupid to figure out how to do this. What is the magic?

I’m terribly afraid that this basic stuff has already been covered, but I am struggling to even drive the search system on this Yahoo Groups setup.

Thanks for any help.

Guy McBride

Chichester Cruiser Racing Club

Sailwave · 3 May 2016 17:07

Hi Guy - Sailwave as you correctly say has a rating for each race. With NHC the calculation uses both the rating for the current rating for this race and the base rating together with the results for the race to calculate the rating for the next race based on the algorithm specified by the RYA NHC. The calculated rating is stored in the next race (Which is why you always need to have 1 more race in the series than have been sailed).

To start a new series you can simply delete all the races except the extra one at the end of the series. This race then becomes race 1 for the new series and it will have all the ratings stored in it from the end of the previous series.

The recommended way by the RYA is that you can maintain multiple series. e.g. You may have a Wednesday evening series and a Sunday Series. The base ratings for boats will be the same in both series but their NHC rating may be different. This does make some sense when you think about it, as often the Crew for Wednesday evening series and Sunday series is different. Also the weather conditions (dying wind on the evening series) can be different as can the performance on different courses (Sunday courses are often longer), and boats and crew perform differently under different conditions.

Later versions of Sailwave have a competitor column (NewRating) which is automatically populated by Sailwave to contain the rating for the next race. So if you wish to publish this simply publish this column the same as you would any other column.

Jon

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On 3 May 2016 at 16:39, guy.mcbride@ntlworld.com [sailwave] sailwave@yahoogroups.com wrote:

We have various series through the year and, indeed, a main series every year. I understand that NHC keeps running and that you do not reset to ‘base number’ within a club at the start of each series (or even start of each year). Some of series have only have a subset of our total membership attend them. Empirically, I have discovered that the ‘Default CR’ number entered into Sailwave is used for each calculation of the used CR for every race (I guess this ‘normalizes’ the CRs to some sort of anchor). I also notice that the total number of ‘known boats’ affects the CR for each race. If I just use the boats that attended a series for the calculation I get different race CRs than if I use the full set of boats but with many as DNC for the whole series.

So what is the correct way to start a series?:

Always use the Base CR (from RYA) in the CR column of sailwave and then ‘fix’ the CR of the first race to be the calculated ‘Next Race CR’ from the previous series.

Use the calculated ‘Next Race CR’ from the previous series in the CR column.