The ORC seems to be using a non-standard form of ToD scoring (or at least MUCH different from the ToD scoring used by PHRF in the USA).
The GPH numbers on the ORC certificate are the predicted time (in seconds) to sail 1.0 nm. That is the number ORC Club says to use as a handicap so if you sail a race at exactly that speed your "corrected time" would be zero (00:00:00). If you sail faster than predicted you will have a negative time and if you sail slower than predicted you will have a positive time. That isn't the way ToD scoring typically works (it may be that this is new to ORC and they are still working the bugs out).
Typically, ToD handicaps are taken from some "base" boat just like ToT time correction factors. Usually, this is a 40-50 ft (12-16 m) boat that will sail around the course in approx. 600-700 seconds. With ToD that boat has a handicap of 0 sec/nm while with ToT that boat has a TCF of 1.000. That way the corrected times are all positive and expressed in reference to the "base" 40-50 ft boat. Logically, that makes a lot more sense then having corrected times approx. equal to zero.
I would suggest using a fixed "base boat" as recommended by others. I would tend to use 625 or 650 but it doesn't matter what since this only impacts the corrected times, not the order of the boats.
Art
ยทยทยท
--- In sailwave@yahoogroups.com, Huw Pearce <huw.pearce@...> wrote:
>
> Yiannis & Jamie,
>
> Caveat to the following - this is the first time I have looked at ToD
> handicapping, so I may be completely of beam. Apologies in advance if so.
>
> I have had a look at the ORC web site (www.orc.org) and the rating
> values look plausible (http://www.orc.org/clubcert.htm). I also followed
> the link (http://www.orc.org/clubscoring.htm) to their scoring options
> and using the information on their web site the calculations Sailwave is
> doing appear correct. The ORC web site does not say in what units the
> distance is measured, but are they nautical miles or statute miles! I
> would assume nautical.
>
> What Sailwave seems to be doing when sorting corrected times is taking
> the value of the corrected time ignoring any plus (+) or minus (-) sign.
> I would have expected that all corrected times would be a positive value
> and therefore no problem with sorting on corrected times, but when
> negative times occur it has highlighted a boundary condition that was
> possibly not anticipated.
>
> RACE1 - 27/06/09 at
>
> Start: Start 1, Finishes: Finish time, Time: 14:05:00, Distance:
> 11.6
> Rank Fleet Boat SailNo Club HelmName PHRF Start Finish
> Elapsed Corrected Points
> 1 ORCC GAVINA
>
> 901.7 14:05:00 17:00:46 2:55:46 0:01:26 1.0
> 2 ORCB VANDOME
>
> 788 14:05:00 16:23:20 2:18:20 -0:14:01 2.0
> 3 ORCB GLARONI
>
> 795.5 14:05:00 17:00:40 2:55:40 0:21:52 3.0
> 4 ORCB CALYPSO GP
>
> 805.1 14:05:00 16:18:45 2:13:45 -0:21:54 4.0
> 5 ORCB NEFELE
>
> 813.3 14:05:00 16:10:27 2:05:27 -0:31:47 5.0
> 6 ORCA ALMIRA CYP900
> 769 14:05:00 15:55:03 1:50:03 -0:38:37 6.0
> 7 ORCA ANERADA CYP832
> 769.5 14:05:00 15:52:25 1:47:25 -0:41:21 7.0
>
> My supposition, of ignoring sign of corrected time, is shown on
> examination of the Corrected Time column; 'Glaroni' given 3rd place has
> a positive corrected time but is placed between two boats with negative
> corrected times, i.e. ignoring the sign (+ or -) of the corrected time
> this would be correct.
>
> Kind regards,
> Huw
>