Digital Mode - ARVA evo3 Mode D'emploi

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In the event of a single buried victim 

digital mode

n Primary search (Approach phase) (see D1)
• Pull on SEARCH. The device is in digital mode enti-
2
rely automatically; the LCD screen displays continual-
6
ly as long as you have not detected a signal transmitted
by the victim
• Advance by crisscrossing the avalanche according to
diagram B if you are alone or C if you are several res-
cuers.
• Hold the transceiver horizontally, pointing it downward
and sweeping slowly from left to right and right to left
(you can make a 180° angle)
• Continue until the first clear and distinct signal (direc-
tional arrows lighting up AND the distance display).
Note: It may happen that you are directly in secondary
search, the transceiver picking up a signal right from its
being switched over to reception.
n Secondary search (localization phase) (see D2).
This phase begins from the moment you receive a signal
from the victim.
• The transceiver gives you distance information on the
LCD screen (numbers) AND one of the directional arrows
lights up.
• As soon as a directional arrow lights up, position your
transceiver so that the central numerical arrow is lit and
proceed in the indicated direction. If the numbers de-
crease, you are getting closer to the victim, continue
in this correct direction. Otherwise, head in the op-
posite direction.
• Always try to have the central directional arrow
D
lit in order to progress, carrying out a slight sweeping
movement in the direction the lit arrows are indicating.
This will make it possible for you to cover the shortest distance possible for you to reach the victim. Continue to move
forward until the distance display shows 3.0.
n Final search (pinpointing phase) (see D3). Having reached this indication, the arrow lit, bring the transceiver down
horizontally and in the same position to the level of the snow. The beeps will speed up, the distance indication will
decrease further. Continue until you reach the smallest number. When it increases, come back to the smallest and
locate the victim by the "pinpoint over a cross" technique while continually keeping the transceiver in the
same position.
n "Pinpoint over a cross" technique: the transceiver must absolutely be moved at the level of the snow, parallel to
it and in a straight line. On this straight line, the place must be determined where the distance information is lowest
(beeps very close to each other, or even continuous beeps). From there, move out at a perpendicular and do the same
procedure again. The point where the sound reaches its maximum, determined in this way, is on a vertical with the
transceiver. If necessary, do the procedure one or two more times to further pinpoint the location. It is not neces-
sary however to reach an extremely precise localization with the help of the transceiver. It is indeed often faster to
immediately begin to probe as soon as the probable area of localization is defined with a precision within an area of
about 50 centimeters.