Last Updated: Feb-17, 2017 conversion factor TBC

SCHRS is the principal handicapping system recognized by World Sailing for cat on cat racing. Where monohulls and catamarans race together, Portsmouth Yardstick (PY) ratings are commonly used. The PY Look Alike ratings below are provided to enable catamarans without official PY Ratings to compete.

The Portsmouth Yardstick Committee and SCHRS World Council have agreed a conversion factor that may be applied to any make, model and configuration of catamaran for which an SCHRS rating has been approved by SCHRS so that it may be raced under the Portsmouth Yardstick. The conversion formula is SCHRS x 675 = PY and is shown in the column headed PY LOOK ALIKE.

To strengthen the SCHRS to PY conversion factor, UK clubs are encouraged to provide data to the RYA for all races in which catamarans compete. If such races are initially scored under SCHRS, sailing scoring programs such as Sailwave or HAL Race Results are capable of dual scoring under a second system such as PY. This would allow for results to be considered under both SCHRS and PY and the results of PY Racing to be simply uploaded direct to www.pys.org.uk. (external link) , strengthening both schemes. For advice on dual scoring use scoring software help systems or contact RYA Technical and Racing Services.

2Win Sonic1.285867
2Win Sonic Solo1.266855
2Win Twincat 13 without spi1.4921007
2Win Twincat 15 Sport1.233832
2Win Tyka1.377929
A-Classic (straight/constant curve foils)1.002676
AHPC Capricorn F181675
AHPC Taipan 4.91.071723
AHPC Taipan 4.9 solo1.092737
Alado 18 Aileron1.088734
Alado 18 F18 1675
Bim 161.159782
Bim 16 Javelin 16 solo1.028694
Bim 16 Javelin double1.118755
Bim 18 Class A (>100 Kgs)1.08729
Bim 18 Double1.071723
Bim 18 Double Sloop1.046706
Bim 201.027693
Bim Javelin 18 Hightech1.011682
Bim Javelin 2 (not 18HT)1.042703
Bimare X16 Double Spinnaker1.123758
Bimare X16 Solo1.091736
Bimare X16 Solo Spinnaker1.041703
Bimare X16FPlus1.028694
Bimare F161.035699
Bimare X4 F181675
C 4.81.285867
C 4.8 Major1.25844
Cirrus 16 Q F161.039701
Cirrus 16 Q solo F161.059715
Cirrus B1 F181675
Cirrus Ecole1.09736
Cirrus Energy Regate1.112751
Cirrus Energy Regate Solo1.144772
Cirrus Evolution1.04702
Cirrus Evolution Solo1.086733
Cirrus F18 1675
Condor 161.183799
Dart 161.296875910
Dart 16 X Race1.235834
Dart 181.217821814
Dart 18 Cat Boat1.23830
Dart 18 Spinnaker1.169789
Dart 201.094738
Dart 20 TSX1.102744
Dart 20 TSX Spinnaker1.068721
Dart 60001.113751
Dart Hawk F181675
Dart Sting 1.341905
Dart Sting Cat Boat1.357916
Dart Sting Solo 1.256848
Diam 3 F18 1675
Falcon F16 - 2 crew1.032697
Falcon F16 - cat boat1.051709
Flying Phantom Foiler0.895604
Formula 16 double1.028694
Formula 16 solo1.041703
Formula 181675693
Goodall C2 F181675
Goodall Viper Double1.04702
Goodall Viper Solo1.056713
Gwynt 141.25844
Hawke Surfcat 70201.291871
Hawke Surfcat 7020 (Main Only)1.463988
Hobie 131.5781065
Hobie 141.39938
Hobie 14 race (with jib)1.268856
Hobie 151.302879
Hobie 161.193805
Hobie 16 Easy1.294873
Hobie 16 Spinnaker1.143772
Hobie 17 1.214819
Hobie 181.091736
Hobie 18 Formula1.033697
Hobie 18 Formula 1041.059715
Hobie 18 Magnum (with wings)1.093738
Hobie 18 SX1.11749
Hobie 20 Formula1.019688
Hobie 210.947639
Hobie 21 (3 Crew)0.977659
Hobie 21 Formula0.943637
Hobie Advance1.521026
Hobie Catsy2.0921412
Hobie Dragoon Club1.475996
Hobie Dragoon Xtrem1.409951
Hobie Fox F200.962649
Hobie FX One Cat Boat1.085732
Hobie FX One Double1.043704
Hobie FX Xtrem1.045705
Hobie Getaway1.242838
Hobie Max1.132764
Hobie Max Youth1.143772
Hobie Pacific (no wing-no spi)1.132764
Hobie pacific (wings-spinnaker)1.091736
Hobie Teddy1.5791066
Hobie Tiger F181675
Hobie Twixxy1.43965
Hobie Wave1.4921007
Hobie Wildcat F181675
Hurricane 4.91.137767
Hurricane 5.51.049708
Hurricane 5.9 (without spi)1.051709
Hurricane 5.9 Sport1.019688
Hurricane 5.9 SX1.018687699
Hurricane 5001.155780
Hurricane 500 spinnaker1.107747
KL 15.5 - SL15.51.225827
KL 161.172791
KL 17 Power1.145773
KL 17 Regate1.174792
KL 17 Regate spinnaker1.121757
KL 17.5 Tonic (without spinnaker)1.19803
KL 18 Regate1.094738
KL Booster1.132764
KL Phoenix F181675
Magic F181675
Mattia 141.4821000
Mattia 161.246841
Mattia 171.036699
Mattia 18 (104)1.111750
Mattia 18 (104) spinnaker1.062717
Mattia 18 F181675
Mattia 18 Raid1.025692
Mattia 201.048707
Mattia 20 Sloop1.005678
Mattia 20 spinnaker1.031696
Mattia 20 Venti1.018687
Mattia Declic1.224826
Mattia Esse1.09736
Mattia Esse Solo1.188802
Mattia Esse Sport1.038701
Mattia Esse Sport Solo1.084732
Mattia Flash F181675
Mattia Smile1.13763
Mattia Smile Sport1.093738
Miracle 201.017686
Miracle 20 (without spinnaker)1.068721
Mystere 2000 F201675
Mystere 5.01.198809
Mystere 5.0 Xl1.128761
Mystere 5.5 Fun1.087734
Mystere 5.5 Master1.073724
Mystere 5.5 Master spinnaker1.028694
Mystere 6.00.989668
Mystere Twister F181675
Nacra 151.085732
Nacra 16 curved foils single handed1.045705
Nacra 16 double1.038701
Nacra 16 solo1.062717
Nacra 16 with curved foils1.022690
Nacra 17 Olympic Class0.994671
Nacra 18m21.094738
Nacra 20 Carbon0.879593
Nacra 20 One Design0.961649
Nacra 2005 F181675
Nacra 4.51.273859
Nacra 4.5 Solo1.326895
Nacra 4601.271858
Nacra 460 Solo1.304880
Nacra 460 Solo Spinnaker1.236834
Nacra 460 Sport1.209816
Nacra 5.0 Cat Boat1.256848
Nacra 5.0 Double1.165786
Nacra 5.0 Double spinnaker1.125759
Nacra 5.21.121757
Nacra 5.2 spinnaker1.077727
Nacra 5.5 Raid1.09736
Nacra 5.5 Raid spinnaker1.04702
Nacra 5.5 SL1.076726
Nacra 5.5 SL spinnaker1.032697
Nacra 5.7 Race1.121757
Nacra 5.7 Race spinnaker1.084732
Nacra 5.81.015685
Nacra 5001.171790
Nacra 500 Sport1.119755
Nacra 500 Solo1.229830
Nacra 500 Solo Spinnaker1.165786
Nacra 570 (without spinnaker)1.089735
Nacra 570 Sport1.037700
Nacra 580 (without spinnaker)1.057713
Nacra 580 Sport1.003677
Nacra 6.01.003677
Nacra 6.0 Raid1.009681
Nacra 6.0 SE1.029695
Nacra 6.0 SE spinnaker0.979661
Nacra Blast1.183799
Nacra F17 Sloop1.046706
Nacra F17 Solo1.071723
Nacra F20 Carbon FCS0.858579
Nacra Infusion F181675
Nacra Inter 17 Solo Spinnaker1.105746
Nacra Inter 17 Xl solo1.178795
Nacra Inter 18 F181675
Nacra Inter 20 F200.97655
New Cat F11.424961
New Cat F21.467990
New Cat Swing1.23830
New Marine 16 Swing Cat Boat1.25844
New Marine 16 Swing Double1.192805
Prindle 151.305881
Prindle 161.23830
Prindle 181.14770
Prindle 18.21.094738
Prindle 18-2 spinnaker1.05709
Prindle 191.064718
Prindle 19 Pacer1.075726
Prindle 19 Pacer spinnaker1.02689
Prindle 19 spinnaker1.01682
Prindle Play Cat1.294873
Raptor F161.023691
RS Cat 16 Club1.359917
RS Cat 16 S1.333900
RS Cat 16 XL1.273859
Shadow X1.113751
Shearwater spinnaker1.187801
Shockwave F181675
SL 161.141770
SL 5.21.081730
SL15.5 - KL15.51.225827
Spitfire S1.037700
Sprint 15 Cat Boat1.402946933
Sprint 15 DX1.215820
Sprint 15 GTI1.394941
Sprint 15 Sport Solo1.274860890
Stealth F16 Double1.011682
Stealth F16 solo1.014684
Stingray 5.51.027693
Thundercat 181.063718
Tomahawk F200.991669
Topaz 14C1.429965
Topaz 14CX Spinnaker1.372926
Topaz 14Xtreme1.274860
Topaz 16C1.31884
Topaz 16CX1.253846
Topaz 16S1.378930
Topaz 16S Spinnaker1.309884
Topcat 15 F21.293873
Topcat 15 Solo1.313886
Topcat 18 K11.064718
Topcat 18 Spitfire (without spinnaker)1.145773
Topcat 4.51.224826
Topcat Chico1.6741130
Topcat F11.314887
Topcat F21.261851
Topcat K1 Big Jib1.086733
Topcat K1 Big jib & spinnaker1.047707
Topcat K21.146774
Topcat K2 - spinnaker1.105746
Topcat K3 1.201811
Topcat K3 - spinnaker1.152778
Topcat K3 Solo1.238836
Topcat K3 Solo - spinnaker1.179796
Topcat Spifire 2.31.109749
Topcat Spifire 2.51.088734
Tornado 24m2 Spinnaker0.98662
Tornado Classic1.036699
Tropic GTI1.143772
Tropic GTI - spinnaker1.094738
Ventilo 181.043704
Ventilo 18 HT1.011682
Ventilo 6090.966652
Ventilo M3 Cat boat - spi0.981662
Ventilo Quickie1.021689
Ventilo Zippo1.065719
Warp 181.139769
Warp 18 - spinnaker1.088734