What is a recommended signal to use in case of a fall from a tree stand?

Using three blasts on a whistle as a recommended signal in the event of a fall from a tree stand is effective for several reasons. A whistle is a loud, penetrating sound that can easily carry over long distances, making it more likely that someone will hear it, even in a wooded area where ambient noise may be present. Additionally, a whistle can be blown repeatedly without exhausting physical strength, which is especially important when someone is in distress and needs to signal for help over an extended period.

The other suggested signals, while potentially useful, lack the efficiency and effectiveness of a whistle. Shouting may be limited by physical exertion or fatigue, and clapping hands does not produce a strong enough sound to be heard from a distance. Flashing light may not always be practical depending on the time of day or visibility conditions, and it also requires having the appropriate device on hand. Thus, utilizing a whistle is not only practical but also a widely recommended safety measure in outdoor settings.