A red flag with or soon after a blue or yellow flag with one long sound means ‘The identified boat shall take a penalty by complying with rule C7.3(d).’
Part appendices
Section C — Match Racing Rules
Match races shall be sailed under The Racing Rules of Sailing as changed by this appendix. Matches shall be umpired unless the notice of race or sailing instructions state otherwise.
Note: A Standard Notice of Race, Standard Sailing Instructions, and Match Racing Rules for Visually Impaired Sailors are available on the World Sailing website.
C5.3
Rule C5.2
A blue or yellow flag identifying a boat with one long sound means ‘The identified boat shall take a penalty by complying with rule C7 .’
Rule C5.4
A black flag with a blue or yellow flag and one long sound means ‘The identified boat is disqualified or has retired, and the match is terminated and awarded to...