ARVA Evo3+ Mode D'emploi page 12

In the event of a single buried victim
DIGITAL MODE
Primary search (Approach phase)
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• P ull on SEARCH. The device is in digital mode entirely automatically; the LCD screen dis-
plays continually as long as you have not detected a signal transmitted by the victim
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• Advance by crisscrossing the avalanche according to diagram
if you are several rescuers.
• H old the transceiver horizontally, pointing it downward and sweeping slowly from left to
right and right to left (you can make a 180˚ angle)
• C ontinue until the first clear and distinct signal (directional 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.
Secondary search (localization phase)
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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 decrease,
you are getting closer to the victim, continue in this correct direction. Otherwise, head
in the opposite direction.
• Always try to have the central directional arrow 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 2.0.
Final search (pinpointing phase). Having reached this indication, the arrow lit, bring the
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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.
"Pinpoint over a cross" technique
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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 necessary 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.
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4
: the transceiver must absolutely be moved at
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if you are alone or
2 3
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2
40 m
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40m 40m
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5