PY Look Alike

SCHRS is the principal handicapping system recognized by World Sailing for cat on cat racing. Where monohulls and catamarans race together in the UK, 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 Technical Committee 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.pyonline.org.uk, strengthening both schemes. For advice on dual scoring use scoring software help systems or contact RYA Technical and Racing Services.

PY Look Alike 2026

CLASS

Ratings 2026

CREW

PY

PYLA

2Win Sonic

1.310

2

 

888

2Win Sonic Solo

1.288

1

 

873

2Win Twincat 13 (without spi)

1.541

2

 

1045

2Win Twincat 15 Sport

1.256

2

 

852

2Win Tyka

1.400

2

 

949

A-Class Foils

0.981

1

 

665

A-Classic (straight or constant curve foils)

1.025

1

 

695

AHPC Capricorn F18

1.000

2

 

678

AHPC Taipan 4.9

1.107

2

 

751

AHPC Taipan 4.9 Spinnaker

1.043

2

 

707

AHPC Taipan 4.9 Solo

1.139

1

 

772

AHPC Taipan 4.9 Solo Spinnaker

1.054

1

 

715

Alado 18 Aileron

1.099

2

 

745

Alado 18 F18

1.000

2

 

678

Bim 16 Double Spinnaker

1.174

2

 

796

Bim 16 Javelin 16 Solo Spinnaker

1.042

1

 

706

Bim 16 Javelin Double Spinnaker

1.134

2

 

769

Bim 18 Class A (>100 Kgs)

1.114

1

 

755

Bim 18 Double

1.081

2

 

733

Bim 18 Double Sloop

1.063

2

 

721

Bim 20

1.038

2

 

704

Bim Javelin 18 Hightech

1.030

2

 

698

Bim Javelin 2 (not 18HT)

1.056

2

 

716

Bimare X16 Double Spinnaker

1.143

2

 

775

Bimare X16 Solo (No spi.)

1.132

1

 

767

Bimare X16 Solo Spinnaker

1.064

1

 

721

Bimare X16FPlus

1.045

2

 

709

Bimare F16

1.038

2

 

704

Bimare X4 F18

1.000

2

 

678

Blade 16 Double light (WS < 123 kgs)

1.016

2

 

689

Blade 16 Solo light (WS< 119 kgs)

1.017

1

 

690

C 4.8

1.320

2

 

895

C 4.8 Major

1.281

2

 

869

Catapult

1.294

1

 

877

Cirrus 16 Q F 16

1.042

2

 

706

Cirrus 16 Q Solo F16

1.062

1

 

720

Cirrus B1 F18

1.000

2

 

678

Cirrus Ecole

1.114

2

 

755

Cirrus Energy Regate

1.127

2

 

764

Cirrus Energy Regate Solo

1.156

1

 

784

Cirrus Evolution

1.053

2

 

714

Cirrus Evolution Solo

1.103

1

 

748

Cirrus F18

1.000

2

 

678

Condor 16

1.211

2

 

821

Dart 15

1.439

1

 

976

Dart 15 Sport double

1.431

2

 

970

Dart 15 Sport double without trapeze

1.441

2

 

977

Dart 15 sport solo

1.305

1

 

885

Dart 16

1.333

2

 

904

Dart 16 X Race Spinnaker

1.251

2

 

848

Dart 18

1.240

2

 

841

Dart 18 Cat Boat

1.256

1

 

852

Dart 18 Spinnaker

1.184

2

 

803

Dart 20

1.123

2

 

761

Dart 20 TSX

1.132

2

 

767

Dart 20 TSX Spinnaker

1.084

2

 

735

Dart 6000

1.143

2

 

775

Dart Hawk F18

1.000

2

 

678

Dart Sting Double

1.377

2

 

934

Dart Sting Solo (with jib)

1.285

1

 

871

Dart Sting Solo (without jib)

1.394

1

 

945

Diam 3 F18

1.000

2

 

678

Drake

1.039

2

 

704

Falcon F16 Double

1.035

2

 

702

Falcon F16 Cat Boat

1.053

1

 

714

Falcon 16 Double light (WS<123 kgs)

1.016

2

 

689

Falcon 16 Solo light (WS<119 kgs)

1.017

1

 

690

Flying Phantom

0.903

2

 

612

Flying Phantom Essentiel

0.957

2

 

649

Flying Phantom Essentiel (with side racks)

0.950

2

 

644

Formula 16 Double

1.031

2

 

699

Formula 16 Solo

1.043

1

 

707

Formula 18

1.000

2

 

678

Goodall C2 F18

1.000

2

 

678

Goodall Viper Double

1.045

2

 

709

Goodall Viper Solo

1.058

1

 

717

Goodall Viper Foiling

0.997

2

 

676

Gwynt 14

1.265

2

 

858

Hawke Surfcat 7020

1.324

1

 

898

Hawke Surfcat 7020 (main only)

1.509

1

 

1023

Hobie 13

1.620

2

 

1098

Hobie 14

1.448

1

 

982

Hobie 14 Race (with jib)

1.314

1

 

891

Hobie 15

1.337

2

 

906

Hobie 15 Spinnaker

1.248

2

 

846

Hobie 16

1.227

2

 

832

Hobie 16 Easy

1.334

2

 

904

Hobie 16 Spinnaker

1.160

2

 

786

Hobie 17 (without wings)

1.242

1

 

842

Hobie 17 (with wings)

1.228

1

 

833

Hobie 18

1.117

2

 

757

Hobie 18 Formula

1.108

2

 

751

Hobie 18 Formula Spinnaker

1.044

2

 

708

Hobie 18 Formula 104

1.070

2

 

725

Hobie 18 Magnum (with wings)

1.121

2

 

760

Hobie 18 SX

1.137

2

 

771

Hobie 20 Formula

1.095

2

 

742

Hobie 20 Formula Spinnaker

1.023

2

 

694

Hobie 21

1.013

2

 

687

Hobie 21 Spinnaker

0.953

2

 

646

Hobie 21 Spinnaker (3 Crew)

0.992

3

 

673

Hobie 21 Formula

0.953

2

 

646

Hobie Advance

1.554

2

 

1054

Hobie Catsy

2.163

2

 

1467

Hobie Dragoon Club

1.512

2

 

1025

Hobie Dragoon Xtrem

1.428

2

 

968

Hobie Fox F20

0.976

2

 

662

Hobie FX One Cat Boat

1.096

1

 

743

Hobie FX One Double

1.056

2

 

716

Hobie FX Xtrem

1.057

2

 

717

Hobie Getaway (Without side benches)

1.296

2

 

879

Hobie Getaway

1.273

1

 

863

Hobie Max

1.147

2

 

778

Hobie Max Youth

1.159

2

 

786

Hobie Pacific (no spinnaker no wings)

1.166

2

 

791

Hobie Pacific (spinnaker no wing)

1.105

2

 

749

Hobie cat T1

1.492

2

 

1012

Hobie cat T1 Spinnaker

1.416

2

 

960

Hobie Teddy

1.616

3

 

1096

Hobie Tiger F18

1.000

2

 

678

Hobie Twixxy

1.449

3

 

982

Hobie Wave

1.543

2

 

1046

Hobie Wildcat F18

1.000

2

 

678

Hurricane 4.9

1.168

2

 

792

Hurricane 5.5

1.060

2

 

719

Hurricane 5.9

1.076

2

 

730

Hurricane 5.9 Spinnaker

1.014

2

 

687

Hurricane 5.9 Sport

1.033

2

 

700

Hurricane 5.9 SX

1.037

2

 

703

Hurricane 500

1.216

2

 

824

Hurricane 500 Spinnaker

1.118

2

 

758

IFLY 15 Solo

1.123

1

 

761

IFLY 15 Solo (with code F)

1.084

1

 

735

IFLY 15 Double

1.207

2

 

818

IFLY 15 Double (with code F)

1.164

2

 

789

IFLY RAZZOR Solo

1.079

1

 

732

IFLY RAZZOR Solo, Code F

1.049

1

 

711

IFLY RAZZOR Double

1.150

2

 

780

IFLY RAZZOR Double, Code F

1.116

2

 

757

KL 15.5 (SL15.5)

1.245

2

 

844

KL 16

1.187

2

 

805

KL 17 Power

1.159

2

 

786

KL 17 Regate

1.200

2

 

814

KL 17 Regate Spinnaker

1.135

2

 

770

KL 17.5 Tonic (without spinnaker)

1.219

2

 

826

KL 18 Regate

1.107

2

 

751

KL Booster

1.147

2

 

778

KL Phoenix F18

1.000

2

 

678

L by Erplast

1.348

2

 

914

L by Erplast Spinnaker

1.277

2

 

866

M by Erplast

1.536

2

 

1041

M Race by Erplast

1.432

2

 

971

Magic F18

1.000

2

 

678

Mattia 14

1.504

2

 

1020

Mattia 16

1.266

2

 

858

Mattia 17

1.053

2

 

714

Mattia 18 (104)

1.141

2

 

774

Mattia 18 (104) Spinnaker

1.076

2

 

730

Mattia 18 F18

1.000

2

 

678

Mattia 18 Raid Spinnaker

1.034

2

 

701

Mattia 20

1.066

2

 

723

Mattia 20 Sloop

1.016

2

 

689

Mattia 20 Spinnaker

1.041

2

 

706

Mattia 20 Venti

1.029

2

 

698

Mattia Declic

1.244

2

 

843

Mattia Esse

1.102

2

 

747

Mattia Esse Solo

1.218

1

 

826

Mattia Esse Sport

1.053

2

 

714

Mattia Esse Sport Solo

1.099

1

 

745

Mattia Flash F18

1.000

2

 

678

Mattia Smile

1.154

2

 

782

Mattia Smile Sport

1.113

2

 

755

Miracle 20

1.028

2

 

697

Miracle 20 (without spinnaker)

1.094

2

 

742

Mystere 2000  F20

0.999

2

 

677

Mystere 5.0

1.227

2

 

832

Mystere 5.0 Xl

1.171

2

 

794

Mystere 5.5 Fun

1.124

2

 

762

Mystere 5.5 Master

1.088

2

 

738

Mystere 5.5 Master Spinnaker

1.031

2

 

699

Mystere 6.0

1.004

2

 

681

Mystere Twister F18

1.000

2

 

678

Nacra 15

1.113

2

 

755

Nacra 15 FCS

1.073

2

 

727

Nacra 15 One FCS

1.107

1

 

751

Nacra F16 One – curved foil

1.037

1

 

703

Nacra F16 double – curved foil

1.022

2

 

693

Nacra F16 One

1.059

1

 

718

Nacra F16 double

1.043

2

 

707

Nacra 17 « C » foils

1.002

2

 

679

Nacra 17 Olympic Class full foiler

0.987

2

 

669

Nacra 18M2

1.117

1

 

757

Nacra F20 Carbon

0.891

2

 

604

Nacra 20 One Design

0.976

2

 

662

Nacra F18

1.000

2

 

678

Nacra 4.5

1.307

2

 

886

Nacra 4.5 Solo

1.361

1

 

923

Nacra 460

1.308

2

 

887

Nacra 460 Solo

1.343

1

 

911

Nacra 460 Solo Spinnaker

1.251

1

 

848

Nacra 460 Sport

1.228

2

 

833

Nacra 5.0 Cat Boat

1.289

1

 

874

Nacra 5.0 Double

1.193

2

 

809

Nacra 5.0 Double Spinnaker

1.140

2

 

773

Nacra 5.2

1.148

2

 

778

Nacra 5.2 Spinnaker

1.091

2

 

740

Nacra 5.5 Raid

1.115

2

 

756

Nacra 5.5 Raid Spinnaker

1.048

2

 

711

Nacra 5.5 SL

1.093

2

 

741

Nacra 5.5 SL Spinnaker

1.036

2

 

702

Nacra 5.7 Race

1.149

2

 

779

Nacra 5.7 Race Spinnaker

1.098

2

 

744

Nacra 5.8 Spinnaker

1.029

2

 

698

Nacra 500 Solo

1.262

1

 

856

Nacra 500 Solo Spinnaker

1.176

1

 

797

Nacra 500 Double

1.200

2

 

814

Nacra 500 Sport Spinnaker

1.131

2

 

767

Nacra 500 MKII School

1.205

2

 

817

Nacra 500 MKII School with spinnaker

1.146

2

 

777

Nacra 500 MKII Sport

1.193

2

 

809

Nacra 500 MKII Sport with spinnaker

1.134

2

 

769

Nacra 570 (without spinnaker)

1.120

2

 

759

Nacra 570 Sport Spinnaker

1.055

2

 

715

Nacra 570 MKII

1.070

2

 

725

Nacra 580 (without spinnaker)

1.088

2

 

738

Nacra 580 Sport Spinnaker

1.022

2

 

693

Nacra 6.0 Spinnaker

1.004

2

 

681

Nacra 6.0 Raid Spinnaker

1.016

2

 

689

Nacra 6.0 SE Spinnaker

0.991

2

 

672

Nacra Blast

1.194

2

 

810

Nacra F17 Sloop

1.058

2

 

717

Nacra F17 Solo

1.090

1

 

739

Nacra 18 FCS

0.966

2

 

655

Nacra F20 Carbon FCS

0.868

2

 

589

Nacra Infusion F18

1.000

2

 

678

Nacra Inter17 Xl Solo

1.208

1

 

819

Nacra Inter17 Xl Solo Spinnaker

1.116

1

 

757

Nacra Inter 18 F18

1.000

2

 

678

Nacra Inter 20 F20

0.980

2

 

664

New Cat 14

1.438

2

 

975

New Cat 14 Spinnaker

1.366

2

 

926

New Cat F1

1.462

2

 

991

New Cat F1 Spinnaker

1.386

2

 

940

New Cat F2

1.506

2

 

1021

New Cat Swing

1.244

2

 

843

New Marine 16 Swing Cat Boat

1.256

1

 

852

New Marine 16 Swing Double

1.203

2

 

816

Paper Tiger

1.360

1

 

922

Prindle 15

1.354

1

 

918

Prindle 16

1.273

2

 

863

Prindle 18

1.177

2

 

798

Prindle 18-2

1.118

2

 

758

Prindle 18-2 Spinnaker

1.061

2

 

719

Prindle 19

1.091

2

 

740

Prindle 19 Spinnaker

1.021

2

 

692

Prindle 19 Pacer

1.109

2

 

752

Prindle 19 Pacer spinnaker

1.027

2

 

696

Prindle Play Cat

1.328

1

 

900

Raptor F16

1.025

2

 

695

RS Cat 14 XL Spinnaker

1.427

2

 

968

RS Cat 16 Club

1.403

1

 

951

RS Cat 16 S

1.376

2

 

933

RS Cat 16 XL

1.295

2

 

878

S9 Stunt Solo

1.122

1

 

761

Shadow

1.141

1

 

774

Shadow X

1.125

1

 

763

Shearwater

1.288

2

 

873

Shearwater Spinnaker

1.199

2

 

813

Shockwave F18

1.000

2

 

678

SL15.5 (KL15.5)

1.245

2

 

844

SL16

1.149

2

 

779

SL5.2

1.101

2

 

746

Spitfire Solo (without jib)

1.100

1

 

746

Spitfire

1.055

2

 

715

Spitfire S

1.051

2

 

713

Sprint 15 DX

1.256

1

 

852

Stealth F16 Double

1.014

2

 

687

Stealth F16 Solo

1.016

1

 

689

Stingray 5.5

1.055

2

 

715

Supercat 15 Solo

1.256

1

 

852

Supercat 15 Double

1.182

2

 

801

Supercat 17

1.107

2

 

751

Supercat 19

1.071

2

 

726

Supercat 20

0.998

2

 

677

Supercat 20 (tall rig)

0.963

2

 

653

Thundercat 18

1.107

2

 

751

Tomahawk F20

1.009

2

 

684

Topaz 14C

1.474

2

 

999

Topaz 14CX Spinnaker

1.397

2

 

947

Topaz 14Xtreme

1.299

1

 

881

Topaz 16C

1.347

2

 

913

Topaz 16CX

1.271

2

 

862

Topaz 16S

1.420

2

 

963

Topaz 16S Spinnaker

1.328

2

 

900

Topcat 4.5 Solo

1.263

1

 

856

Topcat Chico

1.798

2

 

1219

Topcat F1

1.396

1

 

946

Topcat F2

1.331

2

 

902

Topcat K1 Classic

1.184

2

 

803

Topcat K1 Streamcut

1.116

2

 

757

Topcat K1 Regatta Spinnaker

1.060

2

 

719

Topcat K2 Classic

1.213

2

 

822

Topcat K2 Streamcut Regatta

1.173

2

 

795

Topcat K2 Spinnaker

1.115

2

 

756

Topcat K2X Classic

1.207

2

 

818

Topcat K2X Streamcut

1.167

2

 

791

Topcat K2X Regatta Gennaker

1.103

2

 

748

Topcat K3 Classic

1.273

2

 

863

Topcat K3 Streamcut

1.232

2

 

835

Topcat K3 Regatta Spinnaker (no jib)

1.166

2

 

791

Topcat K3X Solo Streamcut Jib Spinnaker

1.076

1

 

730

Topcat K3X Solo Regatta (with gennaker DS)

1.114

1

 

755

Topcat K4X Solo

1.370

1

 

929

Topcat K4X Classic (with Jib)

1.382

2

 

937

Topcat K4x Streamcut (with jib)

1.334

2

 

904

Topcat K4X (with reacher)

1.265

2

 

858

Topcat Spifire 2.3

1.148

2

 

778

Topcat Spitfire 2.5

1.144

2

 

776

Tornado

0.960

2

 

651

Tornado 24m2 Spinnaker

0.989

2

 

671

Tornado Classic

1.062

2

 

720

Tropic GTI

1.169

2

 

793

Tropic GTI Spinnaker

1.106

2

 

750

Unicorn

1.206

1

 

818

Ventilo 18

1.057

2

 

717

Ventilo 18 HT

1.030

2

 

698

Ventilo 609

0.980

2

 

664

Ventilo Quickie

1.045

1

 

709

Ventilo Zippo

1.082

2

 

734

Warp 18

1.170

2

 

793

Warp 18 Spinnaker

1.106

2

 

750

Whisper

0.960

2

 

651