CLYC Cruiser Handicapping in 2017

Transcription

1 CLYC Cruiser Handicapping in Results of all CLYC cruiser races 1 will be calculated using the RYA s National Handicap for Cruisers (NHC) system, and/or the Carlingford Lough Rating (CLR) system. Unless skippers are briefed otherwise prior to a race or regatta 2 (eg whitesail only), sail configurations to be used are unrestricted; that is, gennakers or spinnakers are allowed 3. National Handicap for Cruisers (RYA): 2. NHC will be used for Early, Mid, Late and All Seasons and Thursday and October series, which will include all non-whitesail one-off races and regattas. The 2017 starting values as agreed by the Handicap Committee can be found in Table Boats which have already started in an NHC series will retain their current handicap status, regardless of the number of subsequent new entrants to the series. Any newly entered boats which have not previously competed with the current fleet will start on base handicaps. Handicaps are however automatically re-aligned and this may affect all boats. 4. Boats joining an NHC series will attain their proper handicap levels after a few races, and these are often significantly different from the base numbers. Base numbers are intended to be a starting point only. 5. If, unusually, handicapping in a regatta uses NHC, starting NHC values will depend on whether there is a significant number 4 of new boats which have not previously competed with the current fleet; if there is, all boats will start on the NHC base values. In such a case, a boat s handicap will change throughout the event but its finishing handicap will not affect its current NHC club handicap which remains as it was after the last club race. 6. Whatever the starting values, by definition NHC handicaps change after every race, unless there are fewer than three finishers in a race. 7. The NHC calculation of results must run only on RYA approved software, currently the only choice of which is either HAL s Race Results or sailwave. A mathematical explanation of NHC is here: 8. A list of the RYA s NHC base handicaps as used by HAL s Race Results can be found at 9. Starting NHC values have been determined by taking an average of each boat s 2016 NHC values during Races 11 to 58. The Appendix explains why the first 10 races were excluded and how the average values were calculated. Carlingford Lough Rating (CLYC): 10.The Carlingford Lough Rating system was introduced in 2015 to calculate results using fixed handicaps for races or regattas when results are required on the same day as the last race, because it is not feasible to have NHC results calculated in the short time between racing and prize giving. In 2017, CLR will be the primary result for one-off races or regattas. A summary of the allocated 2017 CLR values is given in Table The CLR system has been revised as a trial for 2017, no longer derived from historical NHC averages depending on boat and crew performance, but related to boat data only. CLR values will be reviewed and possibly revised after each Season. 12.Allocated CLR numbers may be appealed by a skipper, well in advance of an event by providing evidence to the Handicap Committee. Revisions will not be back-dated. 13. Figures 1 and 2 show the sequences of steps taken by the Handicap Committee in assigning NHC and CLR values. 14. All this information is subject to revision by the Handicap Committee. 1 CLYC cruiser races include all races where the organiser is CLYC 2 A regatta is defined here as a named event consisting of more than one race 3 NHC handicaps and CLR ratings are independent of sail configuration used 4 A significant number is defined here as greater than or equal to one third of the number of boats in the fleet, rounded up. For example, 1 or more is significant in a fleet of 2 or 3 boats; 2 or more is significant in a fleet of 4, 5 or 6 boats; 3 or more is significant in a fleet of 7, 8 or 9 boats; 4 or more is significant in a fleet of 10, 11 or 12 boats, and so on 19-Jan-17 Page 1 of 5

2 To assign an NHC number to a boat starting the year 1st time to CLYC NHC? Use CLYC agreed starting NHC On RYA Base List? Got Data1? Use the official NHC calculator: Data1 includes Length of hull m Displacement kg Design year and Upwind Sail Area m 2 Use this as the NHC value for Race 1 Use the official NHC calculator: Got Data2? Data2 includes Length of hull m Displacement kg Design year and Length of mainsail luff P m Length of mainsail foot E m Deck to top of jibstay I m Mast to jib tack dist J m Use other cross comparisons Figure 1. Assignment of NHC values at the start of the year 19-Jan-17 Page 2 of 5

3 To assign a CLR value at the start of a season Current Certificate? Find the Spinnaker value Old Certificate? Rating for boat type? Calculate an average for boats of this type Use this as the CLR value for the season s regattas & one-off races CLYC NHC number? Interpolate or extrapolate wrt NHC value Routine Review, New Evidence or New Certificate Use other cross comparisons Should the figure be revised? Figure 2. Assignment of Carlingford Lough Ratings 19-Jan-17 Page 3 of 5

4 NHC & CLR Values Starting NHC for 2017 A. CLR for 2016 B. CLR for 2017 Change A B Invincible % Zuri % Ferdia % Aurora % Humdinger % Warrior % Gannet % Arrested % MaxiMeyes % Thetis % Eaglewing of Down % Atlantic Diva % Synergy % Pandemonium % Sundancer % Table 1. Starting NHC values for 2017 and CLR values APPENDIX Figure 3 shows the 2016 race-by-race values of NHC for each boat, and Figure 4 illustrates how these values changed throughout Because new-comer Warrior performed much better than predicted by her initial NHC value, and she did not stabilise her values until about the 11 th race, the first 10 races have been excluded from the averaging for all boats. Consecutive duplicate values arise when a boat does not compete in the next race, so to overcome the disproportionate weighting effect of these values, they have been excluded from the averaging process. 19-Jan-17 Page 4 of 5

5 NHC (Cruiser Handicap) Values Starting Each Race Humdinger Warrior Invincible Gannet Aurora Arrested Atlantic Diva Thetis Synergy MaxiMeyes Pandemonium Figure 3. Actual values during 2016 NHC Change at the Start of Each Race 15% 10% 5% 0% -5% -10% -15% Warrior Gannet Invincible Synergy Arrested Humdinger Atlantic Diva Aurora MaxiMeyes Thetis Pandemonium Figure 4. NHC Progress during Jan-17 Page 5 of 5