
Originally Posted by
AltaPowderDaze
prevention is key but doesn't always happen.
i was looking back over some notes from an avy class and thought they might be appreciated here. i've added some text to to them but the overall idea is the same.
not many people truly prepare for a slide. you can practice all you want but there are things that occur that you will not be able to reproduce or simulate.
here are a few things to remember when things go south:
As the Victim:
--Yell. let someone know you are in trouble. this is one of the reasons you do not yell stuff like sick and whoa when you ski the backcountry. your partner can't always safely spot you the whole way down so if he hears something other than your agreed upon "i'm in a safe zone, come on down" term, he knows something is wrong.
--Get OFF the slab. gain speed quickly and take a 45* route off the slab in the direction you are headed or to the island of safety you have already identified. you have about 1-3 seconds to do this before you will be at the mercy of the moving mountain.
--Dig In. if you are in the center of a large slab and unable to 45 out, you can try to arrest on the bedsurface or grab a tree/rock. obviously this works better if you are at the crown (top of the slide) and if you are moving slowly. a whippet comes in handy for this but you can slide your hands down any ski pole to use the ends as arrest devices. in small soft slabs under a foot in depth you may be able to use your edges to hold onto the bedsurface. same idea as steep skiing here. don't lean your upper body into the slope or you will be taking a ride. instead, lean the knees into the hill and stand tall. again, this works better if you are at the top with less moving snow above you.
-- if you are caught, Swim and ditch your gear. it sounds funny but you aren't freestyling to get ahead of the slab. the idea is to drop your poles (remember this is easy since you aren't wearing pole straps in avy terrain) and get out of your skis if possible. in a violent slide they will drag you down like an anchor. i've heard people talk about rolling to get out of your skis. i have no experience with that but it sounds plausible. if your pack is less dense than the surrounding snow you are flowing in, it will help you float. keep it on because you may need your gear to extract yourself/others or treat injuries. when it comes to swimming try to keep yourself stomach up and use backstrokes. if there is a preferred direction to head away from obstacles or to get out of the slide, then emphasize that in your strokes. you often don't have much of a choice where you go in a slide but you may just be able to miss a tree/cliff band by doing so. remember to stay on top of the snow any way you can.
--When the snow slows, Get to the surface. jump, stick an arm up or whatever you do to be visible and hopefully unburried.
Clear an airway get a hand in front of your face so you will have an air pocket. survivors buried more than a few minutes almost always have an air pocket that prevents a death mask from forming over their face causing CO2 poisoning.
Expand your lungs. the weight of the snow is enormous. if you have full lungs and are under 3' of snow you will likely only have half capacity. hold the air in your lungs for a few seconds to allow the snow to set and not fill back in the room you have allowed for lung expansion. Don't Panic now. you've done everything you can do for the moment. all that is left is to lower your heart rate, breath calmly and wait for rescue. if you were practicing safe protocol you should have the rest of your party for extrication.
For the Rescuers:
--Watch you partner go down. follow his track and the moving snow that he/she may disappear in. if you lose sight of them either in snow or because of an obstacle, mark the point of last seen for a starting search point.
--Survey the situation. first, make sure the scene is safe enough to enter. are there multiple paths that drain into the same runout where you will be performing a rescue? can another party come in on top of you and release more slab above the crown? should someone be a lookout for other avalanches? spend a few seconds to take in the info you have seen and make a plan. it can prevent costly mistakes. (ie. on an ideal open slope you can have a spotter up to to direct the searchers to the point last seen and help line up any visual clues from above.)
--EVERYONE SWITCH TO RECEIVE. this is the biggest mistake in avy classes and situations with multiple searchers. you can spend minutes before you realize you are following a moving signal. don't make that mistake.
--Don't send for help, yet. you need all the available resources you have. if there are multiple searchers one can call for help but remember that a live recovery of a buried victim will be made by those already on scene. an organized search party will most likely recover a body.
--Go to the point last seen. always start your beacon search here unless you can see a hand, leg or some part of the victim. a pole/ski may be attached but it would be an aweful mistake to find out that the item came off and was downhill from the victim.
--Determine the likely trajectory and look for clues. line up the visual clues (poles, skis, gloves, helmet, etc) or terrain features that may funnel or slow debris such as gullys, trees, rocks and benches. Search these possible burial locations. obviously this is much easier to do with more than one rescuer. do not neglect checking the clues that may be attached to the victim, like poles or skis. people are found more quickly when an article, clue or body part is visible from the surface. check these and stand them up if the victim is not attached. it tells other rescuers that they have been checked and makes them obvious for the big picture.
--Use your beacon. The beacon leads to the probe. the probe leads to the shovel . and the shovel leads to your partner. When searching for a signal, hold the beacon near you ear while rotating the beacon through all 3 axis at around 1 axis every second. you will pick up the signal sooner if you beacon's orientation matches the transmitting beacon's. once you have a signal, keep your beacon in that orientation and follow the signal or directionals until you are within 3-5m.
--Slow down as you get close, take the time to really pinpoint the location and probe before digging. at this point, digital users should disregard directionals and focus on distance indicators, as the directions become unreliable so close to the buried beacon. micro grid to get your lowest distance(digital) or loudest signal(analog). the micro grid is simply moving the receiving beacon two dimensionally at the snow surface in a cross (+) fashion --X & Y axis-- to get the desired indication. holding the beacon in the same orientation, move the beacon up the slope until the distance indicator goes up. then, on the same line move down the slope until the distance goes up again. return to your lowest indication and repeat the process side to side to get your lowest indication. you may then need to repeat the Y axis (up and down) to see if your indicator drops again. repeat this process until you receive your lowest number and mark that point. when done properly this only takes 10 seconds and can save you minutes of probing.
if multiple rescuers are available you can have one setting up the probe and the other readying a shovel as you finish the micro grid search.
Continued in post #4...
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