A systematic circular search pattern for isolating the signal of an additional buried transceiver in a multiple burial rescue situation.

There are two common techniques for handling signal overlap in a multiple burial scenario. Both employ a systematic search pattern that is used to get closer to the second burial and identify when the transceiver switches signals to the second burial. In the 3-circle method, the rescuer searches in three concentric circles centered around the first burial, paying close attention to any unexpected change in the distance reading, which should be showing the radius of the circle. Each circle expands an additional 3 meters away from the first burial. If this method is ineffective, you can turn the first beacon off from transmitting once it is recovered from below the debris.


Credit: S. Christie