| Sugarloaf Sailing Club |
| Racing Information |
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| This is meant to be an indication of flags used often or from time to time at Sugarloaf - refer to International Rules for the more extensive, correct and detailed interpretation | |||
Numerical FlagsThe relevant Division flag/s are hoisted 5 minutes prior to the start as a WARNING SIGNAL. The START SIGNAL is the lowering of the respective course flag. | |||
| Code 1 Start Division 1 |
Code 2 Start Division 2 |
Code 3 Start Division 3 |
Code 4 Start Division 4 |
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Alphabetic Flags |
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Code C Short Leg Start toward the Common Gate |
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Code P Four minutes prior to the start this PREPARATORY Signal will be hoisted. It will be dropped 1 minute prior to the start |
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Code X Individual Recall |
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Code Repeat 1 - First Substitute Division Recall |
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Code S Shorten Course |
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| Mooring Location | Course Flag | Depth | |||||||
| Name | Abb. | Latitude (Min Dec) |
Latitude (Deg Dec) |
Longitude (Min Dec) |
Longitude (Deg Dec) |
Col.1 | Col.2 | At FSL | |
| Ashmores | A | -37,40.337 | 37.6722833 | 145,19.077 | 145.31795 | 30 | |||
| Ashmores Inside | A1 | -37,40.126 | 37.6687667 | 145,19.237 | 145.3206167 | 20 | |||
| Block House | B | -37,40.487 | 37.6747833 | 145,18.062 | 145.3010333 | Green | 60 | ||
| Block House Strait | BHS | -37,40.451 | 37.6741833 | 145,18.270 | 145.3045 | Yellow | 30 | ||
| Common Gate Port | CW | -37,40.116 | 37.6686 | 145,18.408 | 145.3068 | 30 | |||
| Common Gate Starboard | CE | -37,40.107 | 37.66845 | 145,18.445 | 145.3074167 | 30 | |||
| Island | IS | -37,40.418 | 37.6736333 | 145,17.965 | 145.2994167 | Blue | Red | 30 | |
| Mobile Mast | M | -37,39.801 | 37.66335 | 145,18.005 | 145.3000833 | 30 | |||
| Mt Graham | G | -37,40.592 | 37.6765333 | 145,18.884 | 145.3147333 | Blue | 30 | ||
| Mt Graham New | GN | -37,40.530 | 37.6755 | 145,18.930 | 145.3155 | Blue | 30 | ||
| Mt Graham Red | GR | -37,40.520 | 37.6753333 | 145,18.798 | 145.3133 | Red | 43 | ||
| Short Mt Graham | SHG | -37,40.375 | 37.6729167 | 145,18.825 | 145.31375 | Yellow | Green | 30 | |
| Course Lengths at >71% Cap. | ||||
| ID | Course Name | NM | km | Crrctn |
| 13 | Blue | 1.879 | 3.479 | 0.904 |
| 11 | Green | 1.52 | 2.815 | 1.117 |
| 12 | Red | 1.698 | 3.144 | 1 |
| 10 | Yellow | 1.23 | 2.278 | 1.38 |
| Course Lengths 50%->71% Cap | ||||
| ID | Course Name | NM | km | Crrctn |
| 23 | Blue | 1.998 | 3.7 | 0.909 |
| 24 | Green | 1.629 | 3.016 | 1.116 |
| 22 | Red | 1.817 | 3.365 | 1 |
| 21 | Yellow | 1.298 | 2.403 | 1.4 |
| The following yardsticks are those used in all Sugarloaf racing results and are current (as published by Yachting Australia) at the beginning of the Sugarloaf Season on the 1st of September. |
| Class | HullType | Yardstick | Design Crew Weight |
Notes |
| A CLASS CLASSIC | C | 65.50 | 20/11/2018 | |
| A CLASS FLYING | C | 63.00 | Includes all A Class catamarans (with a valid current measurement certificate) that do not comply with the restrictions of the Classic or Vintage Divisions | |
| A CLASS VINTAGE | C | 71.00 | 75.00 | All hull designs inclusive of foils that are straight, parallel or canted or with a constant curvature or (other foil designs, including but not limited to or shapes, are not permitted), with or without rudder winglets or similar |
| ALPHA OMEGA 4.3 | C | 88.00 | ||
| ALPHA OMEGA 5.0 | C | 82.00 | ||
| AQUAKAT | C | 87.00 | ||
| ARAFURA | C | 101.00 | 20/11/2018 | |
| ARROW | C | 89.00 | 73.00 | 20/11/2018 1 up trap (Class approved Square Top Main, +1 for Pin Head Main) |
| B14 | C | 95.50 | ||
| CALYPSO 14A | C | 93.00 | ||
| CALYPSO 14R | C | 92.50 | ||
| CALYPSO 16 | C | 85.50 | ||
| CALYPSO 4.4 | C | 85.00 | ||
| CANOE INTERNATIONAL | C | 94.00 | ||
| CAPER CAT | C | 103.00 | ||
| CAPRICORN | C | 66.50 | Sloop - 2 up trap (F18 compliant) | |
| COBRA CAT | C | 83.50 | 20/11/2018 1 up trap (Class approved Pin Head main, - 1 for Square Top Main of same area) | |
| COBRA SLOOP | C | 80.00 | 2 up trap (Class approved Pin Head main, - 1 for Square Top Main of same area) | |
| DOLPHIN | C | 85.00 | 75.00 | 20/11/2018 1 up trap |
| F16 CAT | C | 77.60 | 20/11/2018 = 2024 10% sugarloaf tri course correction. Spin assumed. | |
| F16 SLOOP | C | 67.50 | 20/11/2018 | |
| F18 | C | 65.00 | 20/11/2018 Standard Class for SCHRS/YV conversions (F18 Box Rules) | |
| FLYING PHANTOM | C | 56.00 | 20/11/2018 | |
| GEMINI | C | 88.00 | ||
| HOBIE 14 | C | 99.40 | For Inland waters changed to 99.4 per https://docs.google.com/spreadsheets/d/16QK_SZ5PzdfpevYGgvmdpzX8ridQyi_EuG-zw4KzzqA/edit?usp=sharing20/11/2018 1 up (trap - 2) | |
| HOBIE 14 TURBO | C | 90.50 | 20/11/2018 1 up trap | |
| HOBIE 16 | C | 83.50 | Changed from 80.5 to 83.5 to better suit inland waters particularly wind speeds of 7 kts using North American sailing Association data normalised to YV data. | |
| HOBIE 16 ONE UP | C | 86.00 | Changed from 78 to 86 to better suit inland waters particularly wind speeds of 7 kts using North American sailing Association data normalised to YV data. | |
| HOBIE 16 WITH SPINNAKER | C | 75.50 | 20/11/2018 Sloop - 2 up trap (Spin of 17.5 m 2 ) | |
| HOBIE 17 | C | 82.00 | Changed from 80.0 to 82 to better suit inland waters particularly wind speeds of 7 kts using North American sailing Association data normalised to YV data. 20/11/2018 SE – 1 up trap: cat rigged with wings | |
| HOBIE 17 SPORT | C | 79.00 | ||
| HOBIE 18 | C | 76.00 | ||
| HOBIE 20 | C | 73.00 | ||
| HOBIE GETAWAY | C | 92.00 | 20/11/2018 Based on US yardsticks and similarity to Hobie 14 turbo (one up). With front tramp and wings | |
| HOBIE HAWK | C | 152.00 | ||
| HOBIE TIGER | C | 67.00 | Sloop - 2 up trap (F18 compliant) | |
| HSP Tri | C | 80.00 | ||
| HURRICANE 5 | C | 76.00 | ||
| HURRICANE 5 SLOOP ONE UP | C | 73.00 | ||
| HYDRA | C | 82.50 | ||
| HYDRA SLOOP ONE UP | C | 80.00 | ||
| Jay Cat 14ft Cat Rig | C | 100.00 | No reference found. Assuming similar to a Hobie 14 | |
| KITTY CAT | C | 99.00 | ||
| MARICAT 4 CAT | C | 111.00 | ||
| MARICAT 4 SUPER SLOOP | C | 94.00 | ||
| MARICAT 4.3 SLOOP ONE UP | C | 91.20 | ||
| MARICAT 4.3 CAT | C | 95.50 | ||
| MARICAT 4.3 SLOOP | C | 88.00 | ||
| MARICAT 5.0 | C | 81.00 | ||
| MOSQUITO - With Spinnaker | C | 87.50 | ||
| MOSQUITO CAT | C | 83.50 | 75.00 | |
| MOSQUITO SLOOP | C | 82.00 | ||
| NACRA 14 SQ | C | 85.00 | ||
| NACRA 15 | C | 69.50 | ||
| NACRA 16 SQ | C | 79.50 | 20/11/2018 Pin Head Main -1 for Class approved Square Top Main, | |
| NACRA 17 | C | 72.10 | ||
| NACRA 4.3 | C | 88.00 | ||
| NACRA 4.5 | C | 88.00 | ||
| NACRA 5.0 | C | 80.00 | ||
| NACRA 5.2 | C | 79.00 | ||
| NACRA 5.5 | C | 74.00 | ||
| NACRA 5.8NA | C | 72.00 | Sloop - 2 up trap pin head main ( Large jib/foil bridle, -0.5 Class approved Square Top Main ) | |
| NACRA F20 CARBON | C | 56.00 | ||
| NACRA INT 17 | C | 72.50 | ||
| PAPER TIGER | C | 92.50 | 75.00 | 20/11/2018 1 Up |
| PRINDLE 15 | C | 89.00 | 1 up trap | |
| PRINDLE 16 | C | 84.00 | 2 up trap | |
| PRINDLE 18 | C | 80.00 | Sloop - 2 up trap | |
| PRINDLE 18 SLOOP ONE UP | C | 81.00 | ||
| QUEST B2 | C | 81.00 | ||
| SCAT | C | 96.00 | ||
| SOLCAT 18 | C | 87.00 | ||
| STINGRAY MK2 | C | 75.00 | ||
| SUNDANCE 5.0 | C | 84.00 | ||
| TAIPAN 4.9 CAT | C | 76.00 | 75.00 | 1 up trap 20/11/2018 |
| TAIPAN 4.9 CAT Spin | C | 72.00 | 1 up trap - (Spin of 17.5 m 2 ) 20/11/2018 | |
| TAIPAN 4.9 SLOOP | C | 72.50 | 20/11/2018 | |
| TAIPAN 4.9 SLOOP ONE UP | C | 71.80 | ||
| TAIPAN 4.9 SLOOP SPIN | C | 69.00 | 2 up trap - (Spin of 17.5 m2) | |
| TAIPAN 5.7 | C | 70.00 | ||
| TAIPAN 5.7 with Spin | C | 65.00 | ||
| TORNADO - Pre 2002 | C | 69.00 | ||
| TORNADO Post 2002 | C | 65.00 | ||
| VIPER CAT | C | 71.50 | 20/11/2018 1 up trap (F16 Compliant) No Spin | |
| VIPER SLOOP | C | 74.80 | 2 up trap (F16 Compliant) is 68 but modified to when Spin assumed - for Sugarloaf triangular course and conditions | |
| WETA | C | 99.40 | Assumed to be heavily dependent on wind strength and so adjusted for Sugarloaf average of 7Kts and same characteristics as Hobie 14 | |
| WINDRUSH 14 CAT | C | 92.00 | ||
| WINDRUSH 14 SLOOP | C | 91.00 | ||
| WINDRUSH 14 SUPER SLOOP | C | 0.00 | ||
| YVONNE | C | 85.50 | ||
| 10ft Pram | M | 143.00 | ||
| 125 | M | 123.00 | ||
| 12ft Skiff | M | 91.50 | ||
| 145 | M | 113.00 | ||
| 14ft Skiff | M | 84.50 | ||
| 16ft Skiff | M | 85.50 | ||
| 18ft Skiff | M | 68.00 | ||
| 29er | M | 96.50 | ||
| 420 | M | 115.00 | ||
| 470 | M | 101.00 | ||
| 49er | M | 77.50 | ||
| 505 | M | 97.50 | ||
| 59er | M | 96.40 | ||
| ACCESS 2.3 DINGHY | M | 175.00 | ||
| ACCESS 2.3 DINGHY DOUBLE | M | 183.00 | ||
| ACCESS 2.3 SERVO | M | 186.00 | ||
| ACCESS 303 DINGHY | M | 166.00 | ||
| ACCESS LIBERTY | M | 132.00 | ||
| AVENGER | M | 134.00 | ||
| BANSHEE | M | 113.00 | ||
| Byte | M | 115.00 | ||
| Byte CII | M | 120.00 | ||
| CADET 12ft | M | 127.00 | ||
| CADET INTERNATIONAL | M | 153.00 | ||
| CAR TOPPER | M | 155.00 | ||
| CHERUB | M | 103.00 | ||
| CONTENDER | M | 106.50 | ||
| CORSAIR | M | 119.50 | ||
| CORSAIR ONE UP | M | 114.00 | ||
| DIAMOND | M | 103.00 | ||
| DRAGON | M | 107.00 | ||
| E CLASS (LAZY E) | M | 113.00 | ||
| E22 | M | 93.00 | ||
| ECLIPSE | M | 140.00 | ||
| EUROPE DINGHY | M | 120.00 | ||
| FAIRY PENGUIN | M | 156.00 | ||
| FAIRY PENGUIN ONE UP | M | 153.00 | ||
| FINN | M | 112.00 | ||
| FIREBALL | M | 101.00 | ||
| FLYING 11 | M | 131.00 | ||
| FLYING ANT | M | 136.00 | ||
| FLYING ANT SLOOP ONE UP | M | 133.00 | ||
| FLYING DUTCHMAN | M | 93.00 | ||
| FLYING FIFTEEN ** | M | 109.00 | ||
| FLYING FIFTEEN Mk 1 Hull** | M | 112.00 | ||
| FLYING JUNIOR | M | 125.00 | ||
| FORMULA FIFTEEN | M | 92.00 | ||
| GP14 | M | 119.00 | ||
| GP14 One Up | M | 114.50 | ||
| HARTLEY TS 16 W/O MOTOR | M | 125.00 | ||
| HERON | M | 145.00 | ||
| HERON ONE UP | M | 138.00 | ||
| IMPARA | M | 113.00 | ||
| IMPULSE | M | 118.50 | ||
| IMPULSE 6.6 | M | 124.50 | ||
| INTERNATIONAL 2.4 | M | 137.00 | ||
| JAVELIN | M | 97.50 | ||
| JOLLYBOAT | M | 106.00 | ||
| JUBILEE | M | 129.00 | ||
| LASER | M | 114.00 | ||
| LASER 4.7 | M | 125.00 | ||
| LASER II | M | 110.00 | ||
| LASER M | M | 123.00 | ||
| LASER RADIAL | M | 118.50 | ||
| LEADER CAT | M | 117.00 | ||
| MANLY GRADUATE | M | 106.00 | ||
| MICRON 3 | M | 128.00 | ||
| MINNOW | M | 168.50 | ||
| MIRACLE | M | 130.00 | ||
| MIRROR | M | 143.00 | ||
| MIRROR SLOOP ONE UP | M | 140.00 | ||
| MM | M | 160.00 | ||
| MOTH FOILER | M | 60.00 | ||
| MOTH SCOW | M | 115.00 | ||
| MOTH SKIFF | M | 103.00 | ||
| MUSTO SKIFF | M | 91.00 | ||
| NATIONAL E | M | 113.00 | ||
| NATIONAL E ONE UP | M | 108.00 | ||
| NS14 | M | 108.00 | ||
| NS14 CAT RIG | M | 110.00 | ||
| NS14 Sloop One Up | M | 105.00 | ||
| OK DINGHY | M | 115.50 | ||
| OPEN | M | 153.00 | ||
| OPTIMIST | M | 170.00 | ||
| P class | M | 157.70 | ||
| PACER | M | 127.50 | ||
| PACER ONE UP | M | 125.00 | ||
| Rooster | M | 110.70 | ||
| RS Aero 5 | M | 116.80 | ||
| RS Aero 6 | M | 114.60 | ||
| RS Aero 7 | M | 112.50 | ||
| RS Aero 9 | M | 109.30 | ||
| RS FEVA XL | M | 128.00 | ||
| RS FEVA XL One Up | M | 124.20 | ||
| RS Neo | M | 124.30 | Derived from Portsmouth. Reference boat RS Aero 7. | |
| RS ZEST | M | 133.00 | Proportioned from Portsmouth 126 Using Aero 7 as reference 126 X 112/106 | |
| RS200 | M | 108.90 | ||
| RS400 | M | 99.60 | ||
| SABOT | M | 160.50 | ||
| SABOT JUNIOR (2 UP) | M | 167.00 | ||
| SABRE | M | 127.00 | ||
| SAILFISH | M | 133.00 | ||
| SAVAGE DOLPHIN | M | 157.00 | ||
| SHARK 7.2 | M | 120.00 | Sabre with 7.2 sqm Shark sail. | |
| SHARPIE | M | 95.00 | ||
| SOLING | M | 97.00 | ||
| SOLO | M | 123.50 | ||
| SOLO 16 | M | 90.00 | ||
| SPARROW | M | 145.00 | ||
| SPIRAL | M | 124.00 | ||
| SPLASH | M | 134.00 | ||
| SPORTSKIFF | M | 104.50 | ||
| SPRING | M | 127.00 | ||
| Star | M | 98.00 | ||
| STAR | M | 98.00 | ||
| SUGARLOAF SUPER SCOW | M | 140.00 | ||
| SWINGER | M | 130.00 | ||
| TASER | M | 108.00 | ||
| THORP 12 | M | 119.00 | ||
| Vagabond(Mk1)No Spinnaker** | M | 140.00 | ||
| Vagabond(Mk2)No Spinnaker** | M | 135.00 | ||
| VEE ESS | M | 102.00 | ||
| VEE JAY | M | 135.00 | ||
| X3 ED | M | 161.00 | ||
| X3 FUN | M | 147.00 | ||
| X3 RESORT | M | 164.00 | ||
| YNGLING | M | 103.00 | ||
| DF65 RC | S | 500.00 |
| General | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Process | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Calculations | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Course Correction | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Shortened Course | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Yardstick Correction | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| PHS Correction | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Hull Correction | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Points System | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
GeneralThese notes are the compilers view of how the results are calculated. The notes are only to help club members (and the compiler) understand how the calculations are carried out and are certainly not meant to replace or alter the club sailing instructions which remain the definitive club sailing rule document.The results are calculated in accordance with International Saling Rule guidelines and the rules of the Sugarloaf Sailing Committee. Online Software, accessed via the Club web site, has been develdoped to match the sailing program so that the three series, Winter, Summer and Twilight are included and so that the Championship aggregate can be calcualted. Also included are individual races such as the Marathon, Commodore's Cup, Parks Victoria Trophy and Club races. The published results on all web pages are provisional and subject to Sailing Committee endorsement at the end of the Season. ProcessThe calculation process requires several fundamental sets of data.
The sign on sheet is compared with the time data ensuring all boats are accounted for. Those that did not start or did not finish the course need to be marked accordingly. The boat data base is updated to include any new boats. The series database is up dated to include any boats that had not previously sailed in the relevant series. The race information is then entered. This includes weather and course details and the starting time for each division. Individual boat information is then keyed into the relevant race fields in the series database. If a boat has not sailed the course correctly, as indicated in the declaration area of the registration sheet, a code is entered in accordance with the following table.
A time sheet, if used, and camera data is a record of each boat's elapsed time for every South to North crossing of the sight line defined by the lap finish line athe Common Mark Gate. The video recording with its internal clock is run in video edting software to determine the time to the nearest second . Every sail number and time record is then entered into the the system. (Video is archived for a period, depending on computer storage space, to reslove any queries). Having made all necessary entries, the system can then make the necessary time corrections (see 'Calculations' below). Boats are ranked in order of increasing corrected time. This determines the position of each boat in the race. This applies to both boats with skippers who are club members as well as visiting boats. The system calculates cumulative points (see Points System' below) for the relevant race series. Up to 8 reports are generated for each race. Divisonal Yardstick and PHS Race Result, Divisonal Yardstick and PHS Progressive Aggregate Result and the same again for the Championship series. These reports are then saved as HTML/PHP pages ready for uploading to the Web Server. CalculationsThe system sorts through the elapsed time and sail number lists and then counts laps for each boat. Discrepencies are made obvious so that anomolies such as missing laps can be queried.There are two types of calculations performed, 'Divisional' and 'Open'. Divisional calculations determine a result for boats within predetermined groups and 'Open' results rank all boats. Corrections are applied to both types of calculation in the following sequence: 1. Course Correction 2. Yardstcik or PHS Correction Course CorrectionThere are a number courses. Boats sail a course appropriate for their class yardstick. Each course is trianglular with a common corner at the Common Gate and similar angles. The courses also have similar dog legs to avoid shoal water as the lake falls and rises through the season. They do however have different perimeters so that each boat's elapsed time is adjusted with a course correction factor to allow for the different distances sailed. The intent is to arrange, as near as practical, for boats to converge on the common mark at the same time. The same intent applies to catamarans but not necessarily catamarans and dinghies together. This greatly simplifies shortening course, which occurs in around 30% of races. The starting time divsion is also selected to minimise race time differences for leading boats. All dinghies sail 3 laps. Most catamarans sail 5 except for the very fastest which sail 6 laps. The course, starting division and number of laps to be sailed for each class is available in the Sailing Instructions. The start line is at or near the Club Common Gate. This Common Gate is common to all courses and is where all roundings and finish line crossings are recorded as sail number and time. Lap splits are shown on each race result sheet. The system identifies those common mark crossings that represent a complete triangle for each boat sailling each course. It finds the 'speed' of each boat as time per lap. Boat laps are not integers becuase the start line is approx 100m south of the Common Gate. This 100m needs to be taken into account in calculating relative boat speeds and is done so, for each course, by adding or subtracting it as a partial lap depending on whether the start is toward or away from the Common Gate respectively. * The C flag is raised to indicate that the start is a short leg toward the common gate from the start line Shortened CourseThe salient reason for shortening races is reducing wind strength.If a race is shortened only the first lap times are recorded and counted in the results. Yardstick CorrectionYardstick correction is to allow for the differences between boat performances based on class and some boat configuration changes within a class. This correction relies on the yardstick for each class. Corrected Time = (100 X Time per Lap)/Class Yardstick Yachting Victoria yardsticks are generally used. One exception is the Yardstick for the Access 2.3 Servo class. Because of the limitations of a servo controlled boat, such as slower tacking and non servo actuated boom positioning on a run, 6 % is added to YV Access 2.3 (non servo) yardstick. This adjustment does not sufficiently cover the inability of an Access servo to reef while racing so a further adjustment of up to approx. 10%, is made depending on the strength and variablity of the wind. Performance Handicap System (PHS) CorrectionPHS correction allows for both boat class differences and skipper performance. PHS correction is an alternative to Yardstick correction. Only one or the other is applied producing two different sets of results. The PHS handicap is a good indicator of a skipper's performance. For the PHS correction, the back calculated yardstick, derived from each skipper's individual performance is used: BCYS (Back Calculated Yardstick for the skipper's most recent race) = Yardstick X (Corrected Time)/(Corrected Time of 3rd Place ie the reference boat). Corrected Time = (100 X Time per Lap)/Current PHS number The BCYS is the equivalent yardstick of the boat being considered if it is assumed that the 3rd placing boat has sailed to yardstick. The handicap calculation is weighted so that the new handicap does not exactly respond to a BCYS. Rather, it responds gradually over a number of races. The base weighting number is typically 0.06. While this technique produces a gradual change , effectively producing a rolling average over a long period, it can lead to anomolous results in situations where true skipper performance changes rapidly as is the case when there is a sizeable proportion of new sailors in the fleet. So at Sugarloaf we use an algorithm that attempts to allow for this. Starting with a much more aggressive base weighting factor (bwf), 0.5. The bwf was set to 0 in November leading up to the annual stern chase as this appeared to set starting times more consistent with recent race results. Accrodingly, the 'example scenarios' table below is indicative of how the factors work and should not be taken as quantitively correct. Hc=(1-bwf)*Hcp+(bwf)*BCYS New PHS handicap = Hc Previous PHS handicap = Hcp In a depleted fleet, the third place getter might be a new sailor which would unduly inflate the leaders handicap. In addtion, new sailors are less consistent and are not suited as reference boats. If a high performing boat finishes in 3rd place, leading boats should have their handicap number decreased substantially more than otherwise. Accordingly, the bwf is multiplied by the reference boat's performance to the power of 3 as measured by: refboat=yardstick/Hcp such that the reference boat weight (rbw) becomes: rbw=refboat^3 This rbw typically varies between 0.8 and 1.2. The greater the refboats performance, the greater the change to the subject boats handcap. Further, in light wind conditions, there is a greater degree of variation in finishing times, not necessarily indicating a skippers true performance, and so for average winds of 2kts or less, the wind factor (wf) = 0.2 and for greater than 2kts, 1.0 Further, it is desirable for new boats to have their handicap adjusted more strongly as the initial estimate can be inaccurate and also new sailors improve quickly. Accordingly a further adjustment is used. It is based on the number of races sailied in the previous season but to compensate for reasonable performing sailors who have been absent this adjustment only applies if the subject boat performance ratio, yardstick/Hcp, is greater than 0.9. This past races factor (sm) can vary from 2 for zero races sailed in the previous season to 0.5 for 10 or more races sailed in the previous season. The total weighting (tw) =bwf*rbw*wf*sm
Hc=(1-tw)*Hcp+tw*BCYS Example ScenariosFurther, it is possible that a high performing boat, as measured by her yardstcik/handicap ratio, competing against lower performng boats will continue to have her handicap decreased indefinitely. The relationship between the boat being considered and the reference boat can be decribed in 4 scenariosThe number of races in the previous year for these example boats is assumed to be 5 for an sm of approximately 1.
For each race, Handicap Efficiency is calculated as a percentage. It is; (Yardstick corrected time Standard Deviation - the PHS corrected time Standard Deviation)/Yardstick corrected time Standard Deviation, expressed as a percentage. Handicap Efficiency should be positive if the system is working properly. A negative result indicates a special event or that the system has adjusted a boat/s halndicap too aggressively in the previous race. Points AllocationRefer to the Series Sailing Instructions | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||