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5.11 Expert Tips: Building A Snow Trench Shelter
- Feb 26, 2018 -

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As part of our ongoing 5.11 Expert Tips series, we’ve tapped into the expertise of our resident expert on snow shelters, Eduardo. Below you’ll find advice and suggestions for surviving an unexpected situation in a winter climate.

If you ask any survival or outdoor aficionado about their preferred winter shelters, most will answer with “an igloo.” Even though they are the most glamorous and the most comfortable, in real life, they are the wrong selection for most situations.

If planned in advance, built with some acquired construction skills and the required time is available, an igloo is a fantastic semi-permanent shelter.

In reality, a snow shelter will be, most of the time, a hasty solution for an unpredicted bivouac in the wild. Spending an unexpected night outdoors in the cold can be the result of a skier getting lost in a blizzard, or having an accident and being unable to progress to lower ground. It can also be a trekker that is lost or trapped in a rapid weather change. Whatever the reason the adventurer or sportsman has to face spending a night in sub-zero temperatures, it is a situation which poses a real risk to his or her life.

PLANNING

The first protective layer you carry is your clothing — your first pseudo-shelter. Wearing the right clothing will protect you from the elements and greatly simplify the construction of a hasty, lifesaving snow trench shelter.

The first question you should ask yourself is: which winter conditions may I be facing? The answer will dictate your equipment needs. Whilst the enemy is always hypothermia, the threats can be remarkably different when crossing a frozen lake, climbing an icy north face or hunting in the high mountains.

EQUIPMENT

Ideally, your MEL (minimum equipment list) should contain the bare essentials you need to carry to survive. I emphasise survive, because here we are not talking about being cosy. If you are carrying a rucksack you will have more options in the selection of your equipment, but if you are a skier or triathlon racer you will have to keep your equipment weight down to maintain mobility. And this balance between mobility and safety is the one that can get you killed as many will say “I can’t carry survival equipment!” You can carry it and you should carry it.

For example, for a high mobility skier that may tend to be out there with no equipment at all, below is what I recommend.

In a skiing environment you likely won’t have trees to cut branches from to make your shelter roof, or to serve as isolating floor. You will not have wood to burn either so do not bring an axe here. Instead, focus on one large space blanket to maintain body heat and a small basha tarp to serve as a roof or bivouac. To add some navigation capacity, bring a cut-down 1:25000 or smaller scale map that covers your area, so you can find your way out the next morning and a mini compass in your watch. A gas lighter that can give you light and heat, and last but not least, a fully-charged mobile phone completes your MEL. These few items will prove essential when the time comes, weigh next-to-nothing and if placed properly in your clothing pockets won’t limit your mobility.

Not included in your MEL is your waterproof clothing that will serve to protect you from the elements, nor the skis and ski poles that will become your shovel — and roof beams once the trench is shoveled.

You can start out in perfect conditions, but survival situations usually happen unexpectedly. Therefore, I would suggest planning a practice day in good weather and dry clothes, so you learn how to build a trench shelter using your MEL equipment and what limitations your equipment may have. After that, you can do some adjustments.

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