Standard Portmouth Yardstick Numbers Complete Numerical Listing Valid from 9th March 2010. Class PY NO Pursuit Race No Class PY NO Pursuit Race No 18' Skiff a 675 68 Seafly c 1087 109 Foiling Moth 690 69 420 c 1087 109 49er a 744 74 405 a 1089 109 RS 800 a 822 82 Laser 2000 a 1090 109 International 14 * Non Foil 840 84 National 12 * o 1089 109 Laser 5000 a 846 85 Redwing c 1094 109 Boss a 847 85 Wayfarer c 1101 110 RS 700 a 857 86 Laser Vago SD S/H a 1100 110 Canoe International a 870 87 Laser Radial o 1104 110 B 14 a 874 87 OK o 1109 111 Musto Skiff a 875 88 Leader c 1115 112 Flying Dutchman c 879 88 Enterprise o 1116 112 505 c 902 90 Snipe o 1117 112 RS K6 a 903 90 GP 14 c 1127 113 Canoe International o 905 91 Wanderer c 1139 114 59er a 905 91 GP 14 o 1136 114 Laser 4000 a 908 91 Europe o 1140 114 RS 600 o 920 92 Byte CII o 1140 114 29er a 924 92 Lightening 368 o 1152 115 ISO a 926 93 Mercury c 1152 115 Javelin c 926 93 Solo o 1155 116 Cherub * 2005 a 930 93 Byte o 1165 117 Spice a 930 93 Firefly o 1165 117 Laser Vortex a 937 94 Streaker o 1162 116 Osprey c 940 94 Graduate o 1165 117 RS 400 a 950 95 British Moth o 1168 117 National 18 c 957 96 Comet o 1177 118 Laser Vortex o 960 96 Comet Duo o 1175 118 RS 500 a 972 97 Laser 4.7 o 1175 118 470 c 973 97 Miracle c 1185 119 Hornet c 973 97 Splash o 1184 118 Cherub * 1997 a 975 98 RS Feva XL a 1200 120 International Moth * Non Foil 980 98 Topaz Duo o 1190 119 Fireball c 982 98 Pacer o 1193 119 Contender o 993 99 Bosun c 1198 120 RS 300 o 1000 100 Challenger o 1200 120 Buzz a 1002 100 YW Dayboat 1200 120 Merlin-Rocket c 1006 101 Topaz Uno o 1207 121 Laser EPS o 1020 102 Sprint o 1222 122 MX Ray a 1020 102 Laser Pico I person o 1260 126 Tasar o 1023 102 Laser Pico 2 person o 1265 127 12 SQM Sharpie o 1025 103 Signet c 1265 127 Flying Fifteen c 1025 103 Fleetwind o 1268 127 NS 14 o 1028 103 Otter c 1275 128 Laser 3000 a 1032 103 RS Feva Standard o 1280 128 Laser II c 1035 104 Topper o 1295 130 RS Vareo a 1038 104 Lapwing o 1320 132 Kestrel c 1038 104 Heron o 1346 135 Marauder c 1042 104 Gull o 1363 136 Phantom o 1035 104 Mirror 1 person c 1365 136 Laser Vago XD a 1060 106 Mirror 1 person o 1371 137 Laser Vago XD S/H a 1070 107 Mirror c 1385 139 Blaze o 1046 105 RS Tera o 1425 143 Rooster 8.1 o 1053 105 Cadet c 1432 143 Sport 14 c 1055 106 Optimist o 1646 165 Scorpion c 1055 106 RS 200 a 1057 106 o = No spinnaker Supernova o 1063 106 c = Conventional spinnaker Albacore o 1065 107 a = Asymmetric spinnaker Finn o 1062 106 Topper Xenon a 1070 107 * Development classes . Laser Vago SD a 1080 108 Merlins Lark c 1073 107 1984-1988 3331-3429 Plus 10 Solution o 1071 107 1979-1983 3157-3330 Plus 20 Topaz Omega a 1075 108 NS 14 S/H o 1075 108 Laser o 1080 108 RS Vision a 1083 108 Laser Vago SD a 1085 109 Laser Stratos a 1087 109 Comet Trio a 1085 109 Standard Portmouth Yardstick Numbers Complete Alphabetical Listing Valid from 9th March 2010 Class PY NO Pursuit Race No Class PY NO Pursuit Race No 18' Skiff a 675 68 Laser Vortex a 937 94 405 a 1089 109 Laser Vortex o 960 96 420 c 1089 109 Leader c 1115 112 470 c 973 97 Lightening 368 o 1152 115 505 c 902 90 Marauder c 1042 104 12 SQM Sharpie o 1025 103 Mercury c 1152 115 29er a 924 92 Merlin-Rocket c 1006 101 49er a 744 74 Miracle c 1185 119 59er a 905 91 Mirror c 1385 139 Albacore o 1065 107 Mirror 1 person c 1365 137 B 14 a 874 87 Mirror 1 person o 1371 137 Blaze o 1046 105 Musto Skiff a 875 88 Boss a 847 85 MX Ray a 1020 102 Bosun c 1198 120 National 12 * o 1092 109 British Moth o 1168 117 National 18 c 957 96 Buzz a 1002 100 NS 14 o 1028 103 Byte o 1165 117 NS 14 S/H o 1075 108 Byte CII o 1140 114 OK o 1109 111 Cadet c 1432 143 Optimist o 1646 165 Canoe International a 870 87 Osprey 05 Rules 940 94 Canoe International o 905 91 Otter c 1275 128 Challenger o 1200 120 Pacer o 1193 119 Cherub * 2005 a 930 93 Phantom o 1035 104 Cherub * 1997 a 975 98 Redwing c 1094 109 Comet o 1177 118 Rooster 8.1 o 1053 105 Comet Duo o 1175 118 RS 200 a 1057 106 Comet Trio a 1085 109 RS 300 o 1000 100 Contender o 993 99 RS 400 a 950 95 Enterprise o 1116 112 RS 500 a 972 97 Europe o 1140 114 RS K6 a 903 90 Finn o 1062 106 RS 600 o 920 92 Fireball c 982 98 RS 700 a 857 86 Firefly o 1165 117 RS 800 a 822 82 Fleetwind o 1268 127 RS Vareo a 1038 104 Flying Dutchman c 879 88 RS Vision a 1083 108 Flying Fifteen c 1025 103 RS Feva XL a 1189 119 GP 14 c 1127 113 RS Feva Standard o 1260 126 GP 14 o 1136 114 RS Tera o 1425 143 Graduate o 1165 117 Scorpion c 1055 106 Gull o 1363 136 Seafly c 1087 109 Heron o 1346 135 Signet c 1265 127 Hornet c 973 97 Snipe o 1117 112 International 14 * No Foil 850 85 Solo o 1155 116 International Moth * No Foil 980 98 Solution o 1071 107 International Moth * Foiling 690 69 Spice a 930 93 ISO a 926 93 Splash o 1184 118 Javelin c 926 93 Sport 14 c 1055 106 Kestrel c 1038 104 Sprint o 1222 122 Lapwing o 1320 132 Streaker o 1162 116 Lark c 1073 107 Supernova o 1063 106 Laser o 1080 108 Tasar o 1023 102 Laser 2000 a 1090 109 Topaz Duo o 1190 119 Laser 3000 a 1032 103 Topaz Omega a 1075 108 Laser 4.7 o 1175 118 Topaz Uno o 1207 121 Laser 4000 a 908 91 Topaz Xenon o 1070 107 Laser 5000 a 846 85 Topper o 1295 130 Laser EPS o 1020 102 Wanderer c 1139 114 Laser II c 1035 104 Wayfarer c 1101 110 Laser Pico 2 person o 1265 127 YW Dayboat 1200 120 Laser Pico I person o 1260 126 Laser Radial o 1104 110 o = No spinnaker Laser Stratos a 1087 109 c = Conventional spinnaker Laser Vago XD a 1060 106 a = Asymmetric spinnaker Laser Vago XD S/H a 1070 107 Laser Vago SD a 1085 109 * Development classes . Laser Vago SD S/H a 1100 110.