It also requires less energy to get that sound out than your yelling. The universal distress signal with a whistle is three short blasts in succession. Pause for a moment, then repeat. A whistle ...

That is because when it comes to signaling with sound or light, a series of three is considered the universal signal for distress. Read more: Everything You Need To Know Before Taking A Solo ...

Battery-powered lights use multiple LEDs that flash the universal SOS distress signal in Morse code. Visibility can extend up to 10 miles; battery power can last in excess of 35 hours. Hang or secure ...

Attracting attention is key to being rescued. Use a whistle, with three blasts being the universal distress signal, or ...