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REAL LIFE, REAL WORLD

In avalanche-prone terrains, hikers and skiers must be equipped with avalanche rescue beacons that emit and receive electromagnetic signals. These beacons can transmit signals up to 30 meters, creating a circular search area around the missing person. This activity models a rescue search pattern to find a buried skier. Rescuers must strategically follow signal strength by walking in straight paths, marking positions, and forming a circle to pinpoint the location effectively. This exercise is critical for understanding search techniques during real-life emergencies.

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REAL LIFE, REAL WORLD

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  1. REAL LIFE, REAL WORLD Avalanche Rescue

  2. Avalanche Rescues • When hikers and skiers go into terrain where there is a risk of avalanches, they take safety equipment including avalanche rescue beacons. An avalanche rescue beacon sends and receives electromagnetic field signals that can travel up to about 30 meters. A rescue beacon sends out a signal in a circle whose center is the location of the missing person. The search pattern used to locate a beacon buried in the snow is based on the properties of chords and diameters in circles. In the activity, you will model an avalanche search pattern to locate a missing skier.

  3. Activity • When the rescuer first finds the signal, he or she walks in a straight path until the signal disappears, then turns around and walks in the opposite direction until the signal disappears again. Both ends of this path are marked. • The rescuer walks back to the midpoint of this path. • The rescuer walks away from the path at a 90 degree angle until the signal disappears.

  4. Activity • The rescuer turns around and walks in the opposite direction until the signal disappears again. • The rescuer walks back to the midpoint of this new path. This will be the center of the circle formed by the beacon signals. • Confirm that you have located the center of the circle, then dig for your missing skier!

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