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where the signal is strongest (distance reading is lowest) and to
reduce the area to be probed.
Move your transceiver slowly in a straight line along the surface of the
snow during the final three meters of the fine search. The directional
lights do not illuminate in the final two meters, so only pay attention
to the distance readings. From the point where you have located the
smallest reading, “bracket” at 90-degree angles to the left and then to
the right in search of a lower reading (Figure E). Repeat if necessary
along both axes. Begin probing at the lowest distance reading.
Probing/Pinpointing
At your lowest distance reading, probe in concentric circles, with each
probe hole about 10 inches (25 cm) apart (Figure F). Your probe should
enter the snow perpendicular to the slope. Once you have confirmed
the victim’s location, leave the probe in the snow.
Operating Instructions
3.0
2.0
1.0
2.0
3.0
1.6
1.6
Bracketing: Make sure you go well past
the low reading to confirm it is the lowest.
When bracketing, ignore the directional
lights, which no longer illuminate at
less than two meters. Do not rotate the
transceiver during this process, as it can
change the distance readings.
Figure E
Prior to the signal search, be sure that all transceivers are turned
to search mode. Rotate the Tracker slowly in all directions (Figure
D) while moving along your signal search pattern. While searching,
be aware of other physical clues, such as equipment or extremities
protruding from the snow surface. When no signal is detected,
“SE” will flash in the distance indicator. Once a signal is detected
consistently, mark this spot and begin the coarse search.
Coarse Search:
The coarse search is the portion of the search from
where you have detected a steady signal to where you are close to
the victim.
Once the signal is consistently detected, rotate the Tracker slowly
on a horizontal plane until the center direction light
{
is blinking.
The Tracker is now pointed in the direction of the strongest signal.
The four lights on either side of center tell you which way to rotate the
Tracker to engage the center light. The distance indicator
v
tells you,
in approximate meters, how far you must travel (1 meter = 1.1 yards
or 3.3 feet). If the number on the distance indicator is increasing,
you are on the same axis as the victim’s signal, but moving in the
opposite direction. Turn 180 degrees, engage the center search
light again, and continue your search in the direction the Tracker
is pointing. If you are stationary, but the distance is significantly
changing, you are probably detecting the signal of another rescuer.
Make sure all rescuers are in search mode before continuing.
You may find that, while following the directional lights, your route
follows an arc. This is because the Tracker2 follows the shape of the
electromagnetic signal coming from the transmitting transceiver’s
antenna. The distance displayed is the distance to be traveled along
that signal, not the straight-line distance from you to the victim.
Fine Search:
The fine search is the final part of the transceiver
search, which is performed on foot with the transceiver positioned at
or near the snow surface. The objective of the fine search is to locate
Operating Instructions
Slowly rotate the Tracker horizontally and
vertically in your hand, but move rapidly during
the signal search. Do not abandon your search
path until you have captured a strong, steady
signal. Ignore irregular signals, which can
sometimes be caused by electrical interference.
Figure D
90°
10”
10”
25 cm 25 cm
10”
25 cm
Figure F