What
to do if a member of your party is caught in an avalanche
This has been
written as if the rescuer is above the victim looking down, it is just as likely
to be the other way around in which case the steps are the same but much harder
because all the movement is uphill
Stay
calm, think before you act!! Remember where you last saw the victim and
guess the speed of the slide Wait until the slide has stopped. Assess the
risk of a secondary slide which could catch the rescuers. If you have the
manpower post a look out to warn the others of another slide or send someone for
help if near a ski area or hopefully both, If you are alone then begin the search.
Go straight to the last place you saw the victim and physically mark this with
a ski or something. Now guess how far you think he has gone since you last saw
him. Scan the area really carefully for any sign of him, an arm or maybe just
a hand. This could save you the trouble of a electronic search. Get
the whole party to switch their transceivers onto RECEIVE. Also check everyones
transceiver is at maximum sensitivity. If you pick up a really strong signal straight
away suspect that someone is still in transmit mode. If you are in a group then
someone must take charge, preferably the most experienced. The group must spread
out across the width of the avalanche but be no more than 30m apart. If this is
not possible then the avalanche must be searched in sections or using the solo
method or a combination of the two. This is where practice and training come in.
Assuming the group can cover the area, the searchers advance forward keeping in
line and careful not to omit any areas until someone picks up a clear signal.
Once you have a signal your elected best searcher should move until he has the
signal. Now only he continues with the search using the flux line method. Other
members ready themselves with probes and shovels. If
you are the only searcher, you must start at one side of the avalanche and walk
across it staying at the same height, once you reach the other side you descend
30m and then walk back across the avalanche. This process is repeated until a
signal is picked up. This grid search ensures that you are never more than 15m
away from any point on the surface of the avalanche. Most manufacturers claim
that their transceivers work up to 60m apart, in practice battery power,
the cold and interference reduce this considerably. It is better to take a little
more time to find the signal than to reach the bottom of the avalanche debris
and have found nothing. In this case you must work your way back up the avalanche
and try again. If your victim is shielded by Ground features or rocks you may
be quite close to him before a signal is picked up . The
searcher now orientates himself until the strongest signal is picked up. Always
hold the transceiver against your chest and keep it still then move your body
rather then the transceiver. If there is no difference in signal strength with
orientation then move forward in the same direction as before until a better signal
is received. Once you can pick up a best direction from the signal move that way
for 10 metres or until the signal becomes weaker. If you immediately lose your
signal there is a chance you are moving in the opposite direction to the victim,
return to the original spot and do a 360 degree sweep and try the opposite direction.
You will be familiar with this if you have practiced with your transceiver. As
you move forward the signal should become stronger, after 10m or if the signal
becomes weaker stop and reorientate yourself . Again find the best direction (strongest
signal) and follow it for 10m or until the signal weakens. This process will lead
you on a curved path to the victim, as you get closer you will need to turn down
the sensitivity of you transceiver to get the best information. Some transceivers
have lights to show you where the best signal is and when to turn down the sensitivity
and some new digital models tell you when to reorientate and turn the transceiver
down automatically. (See analogue vs. digital page). When you have a strong signal
on minimum sensitivity then you are just about above your victim. It may be that
because of interference, battery power or just depth you never reach the minimum
setting on your transceiver. It is important to remember that if the signal gets
weaker in every direction then you are above the victim Now
you can do the ground search. Take the transceiver from around your neck and hold
it just above the snow. Always keep the transceiver pointing in the same direction
and level. Move it slowly from left to right and identify where the signal is
strongest. Move the transceiver there and then move it slowly forwards and backwards.
Then repeat the left and right sweep, you will identify a place, maybe with a
couple more sweeps where the lines cross at the strongest signal .
If
you have a probe it should be used here to identify the position and depth of
the victim. If you dont hit him at first go, probe the immediate area around.
Once you have located the body leave the probe in place. Estimate the depth of the victim using your probe. Move 1.5 times the depth downhill of the victim and dig a terrace inwards rather than downhill. For more information, please read our article Effective Shovelling. When
you reach the body clear the head straight away and make sure the airway is clear
and that he is breathing. Knowledge of first aid can make all the difference now.
First Aid, like avalanche safety is something that should have been learnt and
practiced beforehand. Your friend will probably be injured by ice/rocks, will
definitely be in shock and only moments away from hypothermia. This is when he
needs you most! Extract
the rest of him with a bit more care in case he has broken bones and make your
evacuation plan. If near a ski area help will not be far away, if not protecting
him from the elements is your first priority. What
to do if you are caught in an avalanche You might be able to do absolutely
nothing in which case enjoy the ride, it may be your last Try to shed your
poles and backpack, these will pull you down, Try to get your feet in front
of you, if you know where the front is !! Save
your energy until you feel the slide slowing down and then make a massive push
towards the surface or to clear an area around your head. Keep your mouth closed
and empty of snow. Once
the slide has stopped, work out if any part of you is clear of the surface, if
so begin to move it as much as possible without panicking, you are trying to draw
attention thats all. If not, try to calm down and wait to be rescued or
to die. This will have already been decided by you and your friends. If you were
moving responsibly (see hints for avoiding an avalanche) and have practiced using
your transceiver with your friends, then they will have a good idea where you
are and will already be homing in on you. If you were not being a responsible
back country skier/boarder then you have chosen to be in this situation and only
luck will save you.
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