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The avalanche beacon. ( or ARVA). The avalanche beacon. First beacon 1968 Dr John Lawton Standard frequency 457 Hz. The avalanche beacon.
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The avalanche beacon ( or ARVA)
The avalanche beacon • First beacon 1968 • Dr John Lawton • Standard frequency 457 Hz
The avalanche beacon • Two modes : - Emission • - Reception • Advantages : - Small Convenient, handy • - Save manylives