CONTENTS Introduction ....................................................... 3
ORC RATING SYSTEMS
1. LIMITS AND DEFAULTS 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114
General ……………………….......................... 4 Materials …….................................................... 5 Crew Weight ...................................................... 5 Hull ….……....................................................... 5 Appendages …………....................................... 6 Propeller ……………........................................ 6 Stability ……..................................................... 6 Righting Moment …………………………….. 7 Rig ……………………………………………. 8 Mainsail ………………………………………. 8 Mizzen ………………………………………... 9 Jibs (also applying to genoas) ………………… 9 Mizzen Staysail ……………………...………. 10 Symmetric Spinnaker ………………………... 10 Asymmetric Spinnaker and Code 0 ………….. 10
2. RULES APPLYING WHILE RACING 200 201 202 203 204 205 206 207 208 209 210
Crew weight …………………………………. 12 Ballast, Fixtures and Equipment ..................... 12 Drop Keels and Movable Appendages ……… 12 Centerboard …………………………………. 12 Manual Power ……………………………….. 12 Rig …………………………………………… 12 Sails ………………………………………….. 13 Jibs (also applying to genoas) ……………….. 13 Spinnakers …………………………………… 14 Mizzen Staysail ……………………………… 14 Penalties ………………………………………14
3. CERTIFICATES 301 302 303 304 305 306
Certificates ....................................................... 15 One Design Certificates ……………………... 15 Certificate Issuing …………………………… 16 Owner’s Responsibility ……………………… 16 Measurement Protests ….…………………… 17 National Prescriptions …..…………………… 18
4. SCORING 401 402 403
General ............................................................ 19 Performance Curve Scoring ............................ 19 Simple Scoring Options .................................. 21
ORC International Certificate Sample …………... 23 ORC Club Certificate Sample ……………………. 26
Index of Symbols …………………………………... 27
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