Last Updated: May-17

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 678 = 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 Sonic1.285871
2Win Sonic Solo1.266858
2Win Twincat 13 without Spinnaker1.4921012
2Win Twincat 15 Sport1.233836
2Win Tyka1.377934
A-Classic (straight/constant curve foils)1.002679
AHPC Capricorn F181678
AHPC Taipan 4.91.071726
AHPC Taipan 4.9 solo1.092740
Alado 18 Aileron1.088738
Alado 18 F18 1678
Bim 161.159786
Bim 16 Javelin 16 solo1.028697
Bim 16 Javelin double1.118758
Bim 18 Class A (>100 Kgs)1.08732
Bim 18 Double1.071726
Bim 18 Double Sloop1.046709
Bim 201.027696
Bim Javelin 18 Hightech1.011685
Bim Javelin 2 (not 18HT)1.042706
Bimare X16 Double Spinnaker1.123761
Bimare X16 Solo1.091740
Bimare X16 Solo Spinnaker1.041706
Bimare X16FPlus1.028697
Bimare F161.035702
Bimare X4 F181678
C 4.81.285871
C 4.8 Major1.25848
Cirrus 16 Q F161.039704
Cirrus 16 Q solo F161.059718
Cirrus B1 F181678
Cirrus Ecole1.09739
Cirrus Energy Regate1.112754
Cirrus Energy Regate Solo1.144776
Cirrus Evolution1.04705
Cirrus Evolution Solo1.086736
Cirrus F18 1678
Condor 161.183802
Dart 161.296879905
Dart 16 X Race1.235837
Dart 181.217825816
Dart 18 Cat Boat1.23834
Dart 18 Spinnaker1.169793
Dart 201.094742
Dart 20 TSX1.102747
Dart 20 TSX Spinnaker1.068724
Dart 60001.113755
Dart Hawk F181678
Dart Sting 1.341909
Dart Sting Cat Boat1.357920
Dart Sting Solo 1.256852
Diam 3 F18 1678
Eagle 20HF *0.883599
Falcon F16 2 crew1.032700
Falcon F16 Cat Boat1.051713
Flying Phantom Foiler0.895607
Formula 16 double1.028697
Formula 16 solo1.041706
Formula 181678693
Goodall C2 F181678
Goodall Viper Double1.04705
Goodall Viper Solo1.056716
Gwynt 141.25848
Hawke Surfcat 70201.291875
Hawke Surfcat 7020 (Main Only)1.463992
Hobie 131.5781070
Hobie 141.39942
Hobie 14 race (with jib)1.268860
Hobie 151.302883
Hobie 161.193809
Hobie 16 Easy1.294877
Hobie 16 Spinnaker1.143775
Hobie 17 1.214823
Hobie 181.091740
Hobie 18 Formula1.033700
Hobie 18 Formula 1041.059718
Hobie 18 Magnum (with wings)1.093741
Hobie 18 SX1.11753
Hobie 20 Formula1.019691
Hobie 210.947642
Hobie 21 (3 Crew)0.977662
Hobie 21 Formula0.943639
Hobie Advance1.521031
Hobie Catsy2.0921418
Hobie Dragoon Club1.4751000
Hobie Dragoon Xtrem1.409955
Hobie Fox F200.962652
Hobie FX One Cat Boat1.085736
Hobie FX One Double1.043707
Hobie FX Xtrem1.045709
Hobie Getaway1.242842
Hobie Max1.132767
Hobie Max Youth1.143775
Hobie Pacific (no wing no spi)1.132767
Hobie pacific (wings Spinnaker)1.091740
Hobie Teddy1.5791071
Hobie Tiger F181678
Hobie Twixxy1.43970
Hobie Wave1.4921012
Hobie Wildcat F181678
Hurricane 4.91.137771
Hurricane 5.51.049711
Hurricane 5.9 (without spi)1.051713
Hurricane 5.9 Sport1.019691
Hurricane 5.9 SX1.018690698
Hurricane 5001.155783
Hurricane 500 Spinnaker1.107751
KL 15.5 - SL15.51.225831
KL 161.172795
KL 17 Power1.145776
KL 17 Regate1.174796
KL 17 Regate Spinnaker1.121760
KL 17.5 Tonic (without Spinnaker)1.19807
KL 18 Regate1.094742
KL Booster1.132767
KL Phoenix F181678
Magic F181678
Mattia 141.4821005
Mattia 161.246845
Mattia 171.036702
Mattia 18 (104)1.111753
Mattia 18 (104) Spinnaker1.062720
Mattia 18 F181678
Mattia 18 Raid1.025695
Mattia 201.048711
Mattia 20 Sloop1.005681
Mattia 20 Spinnaker1.031699
Mattia 20 Venti1.018690
Mattia Declic1.224830
Mattia Esse1.09739
Mattia Esse Solo1.188805
Mattia Esse Sport1.038704
Mattia Esse Sport Solo1.084735
Mattia Flash F181678
Mattia Smile1.13766
Mattia Smile Sport1.093741
Miracle 201.017690
Miracle 20 (without Spinnaker)1.068724
Mystere 2000 F201678
Mystere 5.01.198812
Mystere 5.0 Xl1.128765
Mystere 5.5 Fun1.087737
Mystere 5.5 Master1.073727
Mystere 5.5 Master Spinnaker1.028697
Mystere 6.00.989671
Mystere Twister F181678
Nacra 151.085736
Nacra 16 curved foils single handed1.045709
Nacra 16 double1.038704
Nacra 16 solo1.062720
Nacra 16 with curved foils1.022693
Nacra 17 Olympic Class0.994674
Nacra 18m21.094742
Nacra 20 Carbon0.879596
Nacra 20 One Design0.961652
Nacra 2005 F181678
Nacra 4.51.273863
Nacra 4.5 Solo1.326899
Nacra 4601.271862
Nacra 460 Solo1.304884
Nacra 460 Solo Spinnaker1.236838
Nacra 460 Sport1.209820
Nacra 5.0 Cat Boat1.256852
Nacra 5.0 Double1.174796
Nacra 5.0 Double Spinnaker1.132767
Nacra 5.21.121760
Nacra 5.2 Spinnaker1.077730
Nacra 5.5 Raid1.09739
Nacra 5.5 Raid Spinnaker1.04705
Nacra 5.5 SL1.076730
Nacra 5.5 SL Spinnaker1.032700
Nacra 5.7 Race1.121760
Nacra 5.7 Race Spinnaker1.084735
Nacra 5.81.015688
Nacra 5001.171794
Nacra 500 Sport1.119759
Nacra 500 Solo1.229833
Nacra 500 Solo Spinnaker1.165790
Nacra 570 (without Spinnaker)1.089738
Nacra 570 Sport1.037703
Nacra 580 (without Spinnaker)1.057717
Nacra 580 Sport1.003680
Nacra 6.01.003680
Nacra 6.0 Raid1.009684
Nacra 6.0 SE1.029698
Nacra 6.0 SE Spinnaker0.979664
Nacra Blast1.183802
Nacra F17 Sloop1.046709
Nacra F17 Solo1.071726
Nacra F20 Carbon FCS0.858582
Nacra Infusion F181678
Nacra Inter 17 Solo Spinnaker1.105749
Nacra Inter 17 Xl solo1.178799
Nacra Inter 18 F181678
Nacra Inter 20 F200.97658
New Cat F11.424965
New Cat F21.467995
New Cat Swing1.23834
New Marine 16 Swing Cat Boat1.25848
New Marine 16 Swing Double1.192808
Petrucci S9 Stunt Jib *1.106750
Prindle 151.305885
Prindle 161.23834
Prindle 181.14773
Prindle 18.21.094742
Prindle 18-2 Spinnaker1.05712
Prindle 191.064721
Prindle 19 Pacer1.075729
Prindle 19 Pacer Spinnaker1.02692
Prindle 19 Spinnaker1.01685
Prindle Play Cat1.294877
Raptor F161.023694
RS Cat 16 Club1.359921
RS Cat 16 S1.333904
RS Cat 16 XL1.273863
Shadow X1.113755750
Shearwater Spinnaker1.187805
Shockwave F181678
SL 161.141774
SL 5.21.081733
SL15.5 - KL15.51.225831
Spitfire S1.037703
Sprint 15 Cat Boat1.402951931
Sprint 15 DX1.215824
Sprint 15 GTI1.394945
Sprint 15 Sport Solo1.274864894
Stealth F16 Double1.011685
Stealth F16 solo1.014687
Stingray 5.51.027696
Thundercat 181.063721
Tomahawk F200.991672
Topaz 14C1.429969
Topaz 14CX Spinnaker1.372930
Topaz 14Xtreme1.274864
Topaz 16C1.31888
Topaz 16CX1.253850
Topaz 16S1.378934
Topaz 16S Spinnaker1.309888
Topcat 4.5 Solo1.224830
Topcat Chico1.741180
Topcat F11.36922
Topcat F21.299881
Topcat K1 Classic1.217825
Topcat K1 Streamcut1.084735
Topcat K1 + Spi Regatta1.044708
Topcat K2 Classic1.187805
Topcat K2 Streamcut Regatta1.141774
Topcat K2 Spinnaker1.1746
Topcat K3 Classic1.24841
Topcat K3 Streamcut1.194810
Topcat K3 Spinnaker1.145776
Topcat K3 Solo1.229833
Topcat K3 Solo + Spi Regatta1.17793
Topcat K4X Classic (old 4,.5)1.356919
Topcat K4x Streamcut1.283870
Topcat K4X Spinnaker1.23834
Topcat Spifire 2.31.121760
Topcat Spifire 2.51.117757
Tornado 24m2 Spinnaker0.98664
Tornado Classic1.036702
Tropic GTI1.143775
Tropic GTI Spinnaker1.094742
Ventilo 181.043707
Ventilo 18 HT1.011685
Ventilo 6090.966655
Ventilo M3 Cat boat Spinnaker0.981665
Ventilo Quickie1.021692
Ventilo Zippo1.065722
Warp 181.139772
Warp 18 Spinnaker1.088738

Class names including * have a provisional rating.