If you have the right-of-way and another boat makes you change course to avoid hitting her, she has broken a rule. You can tell her this by “protesting” her. To do this, immediately hail the word “Protest.” If you are racing on a boat 20 feet or longer you must also put up a red flag as quickly as possible (usually immediately) after the incident. Then at the finish tell the race committee which boat you are protesting, and onshore fill out the hearing request form the race committee will give you. Soon afterward, the protest committee (usually three knowledgeable sailors) will hold a hearing at which both boats have the op- portunity to tell their story. The committee will then make its decision. (Rules 60 to 67)
