Yachting Victoria - Handicap Racing Yardsticks 2009-2010
INTRODUCTION (Page source)
These yardsticks are prepared to provide the fairest possible calculation of results for mixed fleet racing.
USE OF THE YARDSTICK
The aim of the yardstick is to provide a basis for yachts of different ratings to compete fairly when sailed well. The yardstick is not intended to compensate for differences in skills or competence of individual sailors. The yardstick is calculated and maintained on a statistical basis and within broad limits remains valid for a variety of wind strengths and courses sailed. Comparison of yachts of different classes sailing different courses is thought to be outside the scope of the current rating system.
DEFINITIONS
Elapsed Time (ET) is the time taken (in minutes and decimal minutes, or in seconds) for a boat to sail a proper course.
Corrected Time (CT) is the elapsed time divided by the boat's class yardstick (YS) and multiplied by 100
Standard Boat Time (SBT) is the corrected time for the first boat on corrected times to sail a proper course. Alternatively consistently sailed boat finishing in the top five of the fleet, on corrected time, can be taken as the standard boat
Back Calculated Yardstick (BCYS) is the corrected time divided by the standard boat time and multiplied by its own yardstick.
Performance Factor (PF) is the BCYS divided by the boat's class yardstick This is used to rate the class yardstick
CT = ETxlOO
YS
BCYS = CT x YS
SBT
PF = BCYS
YS
TRAILABLE YACHT CONVERSION FACTOR
The Class Basic Handicap system (CBH) is recommended for trailable yachts. For occasions when trailable yachts compete with off-the-beach yachts, it is possible to convert CBH to Tentative Yardstick by the formula:
Yardstick = K
CBH
For 2009/10 season K = 80.25
When using K to create tentative yardsticks for trailable yachts the result should be rounded down to the nearest 0.1 to preserve the differential between trailables given by their CBH’s
MIXED CLASS RACING
The best racing occurs when the fleet consists of only one Class, as in State Titles. So, whenever possible, clubs should arrange for a Class to race separately if there are sufficient numbers. For other yachts, divisions should be formed by grouping yachts as shown below:
First preference
Monohulls
Catamarans
Trailable yachts
Sailboards
This may be subdivided into fast and slow divisions related to yardsticks or if sufficient yachts of a class are present they may form a separate division.
Second preference
Monohulls / trailable yachts
Catamarans
Sailboards
In this case it will be necessary to apply the Tailable Yacht conversion factor to obtain tentative yardsticks.
Third preference
Fast monohulls and sailboards
Slow monohulls and trailable yachts
Catamarans
Where fewer than four sailboards compete in an event, they may be grouped the monohulls. Owing to the many types of sailboards and whose performance varies with sail area and wind strength their yardsticks should be treated as tentative.
MIXED CLASS CORRECTION FACTOR
The Mixed Class Correction Factor (MCCF) applies to fleets containing multihulls and monohulls or sailboards and monohulls. The MCCF is derived by dividing the sum of the 5 lowest corrected times for monohulls by the sum of the 5 lowest corrected times for the multihulls or sailboards.
The corrected time for each multihull or sailboard is now further corrected by multiplying it by the MCCF
Notes:
1. Where the fleet contains multihulls, monohulls and sailboards 2 separate MCCF’s must be calculated
2. MCCF's will give extraneous results with very small groups. They should not be used where there is less than 5 of either of the groups under consideration.
These yardsticks are prepared to provide the fairest possible calculation of results for mixed fleet racing.
USE OF THE YARDSTICK
The aim of the yardstick is to provide a basis for yachts of different ratings to compete fairly when sailed well. The yardstick is not intended to compensate for differences in skills or competence of individual sailors. The yardstick is calculated and maintained on a statistical basis and within broad limits remains valid for a variety of wind strengths and courses sailed. Comparison of yachts of different classes sailing different courses is thought to be outside the scope of the current rating system.
DEFINITIONS
Elapsed Time (ET) is the time taken (in minutes and decimal minutes, or in seconds) for a boat to sail a proper course.
Corrected Time (CT) is the elapsed time divided by the boat's class yardstick (YS) and multiplied by 100
Standard Boat Time (SBT) is the corrected time for the first boat on corrected times to sail a proper course. Alternatively consistently sailed boat finishing in the top five of the fleet, on corrected time, can be taken as the standard boat
Back Calculated Yardstick (BCYS) is the corrected time divided by the standard boat time and multiplied by its own yardstick.
Performance Factor (PF) is the BCYS divided by the boat's class yardstick This is used to rate the class yardstick
CT = ETxlOO
YS
BCYS = CT x YS
SBT
PF = BCYS
YS
TRAILABLE YACHT CONVERSION FACTOR
The Class Basic Handicap system (CBH) is recommended for trailable yachts. For occasions when trailable yachts compete with off-the-beach yachts, it is possible to convert CBH to Tentative Yardstick by the formula:
Yardstick = K
CBH
For 2009/10 season K = 80.25
When using K to create tentative yardsticks for trailable yachts the result should be rounded down to the nearest 0.1 to preserve the differential between trailables given by their CBH’s
MIXED CLASS RACING
The best racing occurs when the fleet consists of only one Class, as in State Titles. So, whenever possible, clubs should arrange for a Class to race separately if there are sufficient numbers. For other yachts, divisions should be formed by grouping yachts as shown below:
First preference
Monohulls
Catamarans
Trailable yachts
Sailboards
This may be subdivided into fast and slow divisions related to yardsticks or if sufficient yachts of a class are present they may form a separate division.
Second preference
Monohulls / trailable yachts
Catamarans
Sailboards
In this case it will be necessary to apply the Tailable Yacht conversion factor to obtain tentative yardsticks.
Third preference
Fast monohulls and sailboards
Slow monohulls and trailable yachts
Catamarans
Where fewer than four sailboards compete in an event, they may be grouped the monohulls. Owing to the many types of sailboards and whose performance varies with sail area and wind strength their yardsticks should be treated as tentative.
MIXED CLASS CORRECTION FACTOR
The Mixed Class Correction Factor (MCCF) applies to fleets containing multihulls and monohulls or sailboards and monohulls. The MCCF is derived by dividing the sum of the 5 lowest corrected times for monohulls by the sum of the 5 lowest corrected times for the multihulls or sailboards.
The corrected time for each multihull or sailboard is now further corrected by multiplying it by the MCCF
Notes:
1. Where the fleet contains multihulls, monohulls and sailboards 2 separate MCCF’s must be calculated
2. MCCF's will give extraneous results with very small groups. They should not be used where there is less than 5 of either of the groups under consideration.
YARDSTICKS 2009 – 2010 : MONOHULLS
125 123.00
12 ‘ Skiff 91.50
14 ‘ Skiff 86.50
16 ‘ Skiff 85.50
18 ‘ Skiff 68.00
145 113.00
29er 96.50
420 112.00
470 101.00
49er 84.00
505 97.50
5/50 99.00
ACCESS 2.3 DINGHY 175.00
ACCESS 303 DINGHY 166.00
ACCESS Liberty 132.00
B14 97.00
BANSHEE 113.00
CANOE INTERNATIONAL 93.50
CANOE INTERNATIONAL 90.00
CADET INTERNATIONAL 153.00
CADET 12’ 127.00
CHERUB 106.50
CONTENDER 107.50
CORSAIR 119.50
E CLASS (LAZY E) 113.00
EUROPE DINGHY 120.00
FIREBALL 101.00
FINN 113.50
FLYING ANT 136.00
FLYING 11 131.00
FLYING DUTCHMAN 93.00
Formula Fifteen 92.00
HARTLEY TS 16 W/O MOTOR 125.00
HERON 145.00
IMPULSE 118.50
International 2.4 137.00
JAVELIN 97.50
JUBILEE 129.00
JOLLYBOAT 106.00
LASER 113.00
LASER RADIAL 116.00
LASER 4.7 122.00
LEADER CAT 117.00
MANLY GRADUATE 106.00
MICRON 3 128.00
MINNOW 168.50
MIRACLE 130.00
MIRROR 143.00 Gunter Rig
MIRROR 142.00 Bermuda Rig
MUSTO SKIFF 90.00
MOTH SKIFF 103.00
Moth Scow 115.00
Moth - Foiler 78.00
Moth - Bladerider RX (One Design) 78.00
NS14 108.00
OK DINGHY 115.50
Optimist 166.50
PACER 127.50
SABRE 127.00
SPARROW 145.00
SOLO 125.00
SABOT 160.50
SABOT Junior (2 UP) 167.00
SHARPIE 95.00
SPORTSKIFF 104.50
SPIRAL 124.00
TASER 108.00
NB. Where any doubt exists as to which type the boat is, the Lower Yardstick for the class MUST be used
YARDSTICKS 2009 – 2010 : KEELBOATS
DIAMOND 103.00
DRAGON 107.00
E22 93.00
FLYING FIFTEEN ** 109.00
FLYING FIFTEEN Mk 1 Hull** 112.00
SOLING 97.00
STAR 98.00
YNGLING 103.00
NB. Where any doubt exists as to which type the boat is, the Lower Yardstick for the class MUST be used
YARDSTICKS 2009 – 2010 : CATAMARANS
A CLASS 70.50
ARAFURA 113.00
ARROW 92.00
CALYPSO 14A 93.00
CALYPSO 14R 92.50
CALYPSO 16 85.50
CALYPSO 4.4 85.00
CAPER CAT 103.00
COBRA 84.00
DOLPHIN 85.00
F14 76.00
F16 71.50
F18 69.00
HOBIE 14 94.50
HOBIE 16 82.50
HOBIE 17 82.50
HOBIE 18 78.50
HOBIE TURBO 88.50
KITTY CAT 99.00
MARICAT 4.3 CAT 94.00
MARICAT 4.3 SLOOP 92.00
MARICAT 5.0 80.00
MOSQUITO (ALL) 84.00
MOSQUITO - With Spinnaker 80.00
NACRA 14 sq 84.50
NACRA 16sq 79.50
NACRA 5.0 81.00
NACRA INT 17 72.50
NACRA 5.8 72.50
NACRA 5.8 with Spin 70.00
PAPER TIGER 91.50
SCAT 96.00
TAIPAN 4.9 CAT 76.50
TAIPAN 4.9 SLOOP 73.50
TAIPAN 5.7 70.00
TAIPAN 5.7 with Spin 67.50
TORNADO Post 2002 65.00
YVONNE 85.50
WINDRUSH 14 SLOOP 91.00
The following table of adjustments is provided for the guidance of handicappers. Any resulting yardsticks must be regarded as tentative and should be further adjusted in the light of race results. If a boat is entered and a claim is made to use one of the following adjustment factors which increase the yardstick of the boat, it is recommended that contravening these requirements should be regarded as a breach of Fundamental Rule 2 and be indicated as such in the sailing instructions. All adjustments are made on the current yardstick for the rig defined in the yardstick list.
Change to Rig Adjustment to Yardstick
Non Asymmetric to Asymmetric Spinnaker - 1.5%
Asymmetric to Non Asymmetric Spinnaker +1.5%
Spinnaker to No Spinnaker +2.3%
No –Spinnaker to Spinnaker -3.1%
Reduction in crew size -2.0%
Sloop rigged cat sailed 1 up -4.5%
Single hander sailed 2 up Base yardstick 140+ +4.2%
No Trapeze to Trapeze -3%
ARCHIVAL YARDSTICKS
The archival yardsticks listed below are ratings recorded for each class. The year indicates when the last information was recorded.
MONOHULLS
X3 RESORT 164.00 2005
X3 ED 161.00 2005
X3 FUN 147.00 2005
Vee Ess 102.00 2007
Vee Jay 135.00 2007
CATAMARANS
STINGRAY MK2 74.50 2005
SUNDANCE 5.0 84.00 2005
Hobie 20 73.0 2007
Hobie 17 Sport 79.00 2007
Alpha Omega 4.3 88.00 2007
Alpha Omega 5.0 82.00 2007
Aquakat 87.00 2007
SAILBOARDS
The following yardsticks are provided for guidance for handicapping sailboards in mixed fleet racing. Mixed fleet results involving sailboards are urgently required, as these yardsticks have not been reviewed for many years.
International Raceboard(Flat bottom planing boards) 7.5 max 97 99
Division II Round bottom, displacement boards open class 7.3 max 102 104
Division II Funboards pre 1987 7.3 max 107 110
Open Class 93
Windsurfer one design 6.5 max 112 116
Junior under 16 any board 6.5 max 115
Under 13 years any board 5.5 max 127
Weight is the sailor's dry weight fully equipped including harness and safety gear. Heavy weight is greater than 81 cgs. In wind strengths consistently over Force 4 (15 knots) the yardstick for heavyweight sailors shall be the same as the yardstick for lightweight sailors.
YA Aust Yardsticks info
2009 Yardsticks (Source)
Calculating Corrected Time
Calculation is: Elapsed Time ÷ Yardstick x 100 = Corrected Time.
Express 'Elapsed Time' in minutes and seconds, in decimals of minutes.
eg. 30 secs: 30 ÷ 60 = .5 min
6 secs: 6 ÷ 60 = .1 min
An example:
Elapsed Time: 1 hr 45 mins 15 secs = 105.25
Yardstick: 113
Calculation: 105.25 ÷ 113 x 100 = 93.14 (correct to 2 decimal places)
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