Assertion: avalanche's feature | /r/HasProperty | impossible
Facets:
value: without sophisticated accelerometer
type: OTHER
value: without a digital compass
type: OTHER
Source sentences:
text: Pulse Barryvox and Arva® Link are equipped with a digital compass and free-flowing arrow, facilitating more exact direction finding, even rotating to maintain direction between pulses of the transmitting beacon (a feature that is impossible without a digital compass or sophisticated accelerometer).