| Downs SC Yardstick Numbers in use April 2011 |
| RYA 2011 | Downs | |
| 14 | 840 | 824 |
| 420 | 1087 | 1095 |
| 505 | 902 | 892 |
| 29ER | 924 | 916 |
| 49ER | 740 | 714 |
| Aclass | 681 | 649 |
| ALBACORE | 1064 | 1070 |
| B14 | 874 | 861 |
| BLAZE | 1046 | 1050 |
| BRITISH MOTH | 1164 | 1180 |
| BUZZ | 1003 | 1003 |
| BYTE | 1170 | 1187 |
| BYTE CII | 1140 | 1154 |
| CADET | 1432 | 1475 |
| CANOE INTERNATIONAL | 905 | 895 |
| CHALLENGER | 1174 | 1191 |
| CHERUB* | 941 | 935 |
| COMET | 1179 | 1196 |
| CONTENDER | 993 | 992 |
| DART16 | 853 | 838 |
| DART18 | 800 | 780 |
| ENTERPRISE | 1117 | 1128 |
| EUROPE | 1143 | 1157 |
| FINN | 1060 | 1066 |
| FIREBALL | 980 | 978 |
| FIREFLY | 1168 | 1184 |
| GP14 | 1127 | 1139 |
| GRADUATE | 1160 | 1176 |
| HERON | 1346 | 1380 |
| HOBIE 16 | 805 | 785 |
| HORNET | 979 | 976 |
| ISO | 926 | 918 |
| LARK | 1073 | 1080 |
| LASER | 1082 | 1090 |
| LASER 2000 | 1090 | 1099 |
| LASER 3000 | 1032 | 1035 |
| LASER 4.7 | 1175 | 1192 |
| LASER 4000 | 911 | 902 |
| LASER 5000 | 846 | 830 |
| LASER EPS | 1020 | 1022 |
| LASER II | 1035 | 1038 |
| LASER PICO RACE | 1265 | 1291 |
| LASER RADIAL | 1106 | 1116 |
| LASER STRATOS | 1089 | 1097 |
| LASER VAGO XD | 1064 | 1070 |
| LASER VORTEX | 937 | 930 |
| LIGHTNING 368 | 1152 | 1167 |
| MERLIN-ROCKET * | 1006 | 1006 |
| MIRACLE | 1190 | 1209 |
| MIRROR | 1385 | 1423 |
| MOTH INTERNATIONAL * | 650 | 615 |
| MUSTO SKIFF | 860 | 846 |
| NATIONAL 12* | 1087 | 1095 |
| OK | 1109 | 1119 |
| OPTIMIST | 1646 | 1710 |
| OSPREY | 940 | 934 |
| PHANTOM | 1030 | 1033 |
| RS 100 | 998 | 997 |
| RS 200 | 1057 | 1062 |
| RS 300 | 1000 | 1000 |
| RS 400 | 949 | 943 |
| RS 500 | 972 | 969 |
| RS 600 | 920 | 912 |
| RS 700 | 858 | 843 |
| RS 800 | 822 | 804 |
| RS FEVA XL | 1200 | 1220 |
| RS TERA SPORT | 1459 | 1504 |
| RS VAREO | 1038 | 1041 |
| SCORPION | 1053 | 1058 |
| SOLO | 1155 | 1170 |
| STREAKER | 1162 | 1178 |
| TASAR | 1023 | 1025 |
| TOPAZ UNO RACE | 1218 | 1239 |
| TOPPER | 1297 | 1326 |
| WANDERER | 1140 | 1154 |
| WAYFARER | 1101 | 1111 |