A "Start Flag" is a signal used in various contexts, particularly in racing and sports events. It typically indicates the beginning of a race or competition, allowing participants to know when to start. The flag is often waved by an official, such as a referee or race marshal, and its color can vary depending on the specific rules of the event. In motorsports, the Start Flag is usually a green flag, which signifies that drivers can begin racing. In other sports, such as track and field, a similar concept applies, where a starting gun or whistle may accompany the flag to ensure all competitors begin simultaneously.