Quick Answer
To locate potential rescue sources using sound, shout for help at regular intervals, listen for responses, and use the echo to gauge distance and direction.
Whistling for Rescue
When lost, whistling is an effective way to signal for help. The International Morse Code whistle signal is a series of three short blasts, followed by a longer one. Repeat this sequence every 10-15 seconds to maintain a consistent signal. This whistle signal can be heard from a distance and is easily distinguishable from other sounds.
Shouting for Help
Shouting for help is another effective method to signal your location. Yell your name, the location, and any distinctive features nearby, such as a river or mountain. Aim your voice in a direction where you’d like rescuers to hear you, and repeat your shout every 10-15 minutes. This will help you gauge the distance and direction of potential rescuers.
Listening for Responses
Listen carefully for any responses to your shouts or whistles. Pay attention to the direction and distance of any sounds you hear. If you hear a response, try to gauge the distance using a technique called “echo counting.” This involves shouting and then counting the seconds until you hear the echo. For example, if you shout and hear the echo in 2 seconds, the sound is likely within 1,000 feet.
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