Green flag: Low hazard — conditions are calm, but beachgoers should still exercise caution. Yellow flag: Medium hazard — conditions present a moderate hazard.

Green flags: indicate calm waters; Yellow flags: normal conditions, however swimmers should stay alert. Red flag: strong winds and currents; Purple flag: Marine life warning.

Meanwhile, the end of Duel 2 at Daytona featured a yellow flag just before the checkered flag. The decision to leave the Daytona 500 under green flag conditions was brilliant, but some were still ...