Tag Info

Hot answers tagged

29

There is no specific distance from which a person can fall and have it said they will survive or not survive. There are simply too many other variables that will dominate the factor of "distance." In 1971, flight attendant Vesna Vulović fell 33,333 ft (10,160 meters) and survived without a parachute. On the other hand 556,000 people died in 2013 from ...


23

I personally had a similar sort of a question when I first went through similar kind of stats about these mountains. Getting introduced with these stats is different than totally understanding the mountain and the pandora box it opens. For getting acquainted with the reasons for so many failed attempts, one needs to read tactical data and expedition reports. ...


23

It's not the fall that gets you, it's the sudden stop at the end. The most detailed data on the effects of large accelerations (or equivalently, decelerations) on the human body comes from research into spaceflight and aircraft ejection systems. There is a very detailed paper from NASA here, from which figure 5 (p. 36) is most useful. The summary is: it ...


21

The short answer is "bear spray"; a firearm is really not the most effective option. That said... I will assume you are looking for grizzly protection, since you didn't specify the bear and black bears are relatively shy. Again, using spray is a far more effective way of improving your odds; a review of its use in Alaska found a 98% success rate, with no ...


17

It is safer to be inside the vehicle than out. The NOAA National Weather Service's lightning safety page recommends vehicles as a safe location during a thunderstorm: You are not safe anywhere outside. Run to a safe building or vehicle when you first hear thunder, see lightning or observe dark threatening clouds developing overhead. Stay inside until 30 ...


17

Make a big fire. This may sound silly and couterintuitive, but the reason is pretty simple. If you make a small fire you need to put your stuff pretty close to it to have any chance of drying it in a decent amount of time. And if you put clothes or boots near the fire, then you concretely risk to burn them. While if you make a bigger fire, your equipment ...


15

There are few things which may go wrong: Injury. Carry some kind of the shelter. It may take few hours for mountain rescue to get to your group. Tired. Make sure you have alternative shorter and simpler route in your head. Dehydrated. Carry a bit of extra water or a purification tablets to gather water from streams. Scared. Your rope can serve a good ...


12

Bear canisters should not be suspended. Doing so would make it possible for a bear to steal the canister and take it away. The shape of the canisters make it very challenging for a bear to hold or carry, and normally they will eventually give up and ditch the canister somewhere still close enough that you could find and retrieve it. If you have it hung, and ...


12

Ice screws have a tendency for pressure melting if constantly loaded over some time. Therefore if you build your fixed point belay system and and keep it under more or less constant load while belaying your partner, the screw might start to migrate as the ice below it melts slowly and refreezes above the screw. By this, a screw that was close to bomb-proof ...


12

The first question you need to ask yourself is, do I absolutely need to move this patient. If somebody is too injured to walk out themselves, you want to avoid moving them without proper equipment if at all possible. If there's any chance of a properly equipped rescue team arriving in the same amount of time (or even more time than) it would take you to get ...


11

A trek group should have a Leader who walks in front who leads the trail/route/climb, sometimes cleaning the route or navigating the route. I believe that will be you. Then the second most important person is the Back Lead, who is the last head you have, who makes sure that the pace of the group is maintained and adapted as per the slowest member. You'll ...


11

How can I practice specifically for traverses? A lot of climbing gyms (especially bouldering ones) have traversing walls. If you can find one of these practice there. Or find a boulder that you can circuit climb (climb in a circle around the bottom). How should I go about a traverse with Undercut holds specifically? Generally the trick to ...


11

Are my fears of the anchor pieces popping out justified? Yes. This is an especially big concern when the climber has already placed the first piece of pro above the anchor, but falls before getting a second piece in. The fall factor can be large, and the direction of pull is up. If you don't have any gear that can hold against an upward pull, then your ...


11

Its not necessarily bad as long as you are careful, also somewhat dependent on material. Generally, you want to arrange your clothes so that they are about a temperature where you could comfortably hold your hand. If your clothes are steaming keep a close eye on them and think about moving them back. Material is also an important factor synthetic ...


11

16ft (5m) When rock climbing, you're pretty much guranteed to be landing on rock if you fall. When I trained in CSPS and EMP III, the magic number was 16ft (~5m). If someone fell from upright with their feet above that height or higher onto a solid surface, then they were an instant bag and drag, aka: strapped to a spine-board and rushed to the hospital. ...


10

American black bears They are somewhat common in some wilderness areas of California, mostly in the mountains. In their natural state, black bears are thinly populated on the landscape because it takes a large area to support one, and they are also shy of humans. Black bears are not very large; females can be the size of a large dog. There are certain ...


10

Several things kill people on mountains, many of these are within the individuals control (ensuring they have the right kit, etc.) I'm going to ignore these because all things being equal these should be relatively static (i.e. the mountain itself doesn't make a person more or less well prepared) So here are some factors that affect how dangerous or not a ...


9

Advanced climbers only Climbing is inherently dangerous. Soloing is even more so. Please learn from experienced people and in person, not from Internet. So this answer mainly describes physical principles, supported by some experience that I have. Here is an excellent tutorial, by a climber more experienced than me, that explains the technique in much ...


9

A crevasse that wide cannot just be jumped across (unless you're among the top long jumpers of the world), therefore you have only two possibilities: avoid it or build a bridge over it. Typically such bridges are built using aluminum ladders (cf. image below) that are placed across the crevasse and fixed on both sides. In the ideal case one also builds some ...


9

The Problem with metallic equipment and cold temperatures is that your hands are moist, if you touch a very cold metallic surface (or any other smooth surface), your moisture will freeze to the surface which causes the top layer of your skin to get stuck on the surface. For Example: it's freezing cold outside and you put your tongue (which is very moist, ...


9

Altitude acclimatization is not just a single change in your body but a long list of different things that are going on. There is a nice chart on p. 326 of House and Johnston, Training for the New Alpinism, which gives a list of the following adaptations (they label #6 as two items): increased ventilation rate increased heart rate and blood pressure blood ...


8

With due respect to Ben Crowell, who is I believe a far more experienced outdoorsman than I am, I beg to differ with his answer. (Edit: prior to revision that is.) Having worked at a very small climbing wall I have seen tough ropes completely worn out by top-rope climbing alone, therefore at least in the extreme "Ropes don't become weak from top-roping or ...


8

I have used them heaps for Rappelling, and am more comfortable using a Snow bollard than any other single anchor. I have seen snow stakes bend under the load of one person, ice screws pull the ice off the rock. I have seen deadmen fail when the knots came undone (might have been incorrectly clipped 'biner) (students on that course got a valuable knot tying ...


8

To answer your first question,"If the situation asks for it, should a mountaineer be donating blood at higher altitude?" I'm assuming you're referring to a life and death situation on the mountain where someone desperately needs an emergency transfusion to survive an accident, and whether or not it is safe to offer your blood. My answer would be yes, you ...


8

You will want to look for a sun cream that is designed for swimming - don't bother looking for specific ingredients, look for the bottles that say they are for sun and swim. Usually in addition to the SPF they will have a rating or guide as to how often you need to reapply (eg every swim, or every two swims) @ShemSeger's comment is the recommended way to ...


7

The main standards to focus on for bicycle helmets are probably the CPSC standard in the US, and the EN 1078 standard in Europe. The climbing helmet UIAA 106 standard is based on the EN 12492 standard. Unfortunately the EU standards do not appear publicly available due to copyright issues. Bike helmets: CPSC: Helmet is attached to a 5kg headform and ...


7

Being young, athletic, fit and having great conditions won't help you if you are missing experience in techniques/tactics required when going over glaciers. Kilimanjaro is a high altitude mountain, but it is technically easy. You don't have to touch a glacier there so it's not really a good reference. Therefore I would highly suggest to hire a guide at ...


7

Yes. It is safe to be in your car when in a lightning storm. Cars (pretty sure not soft-tops) and planes act as a Faraday Cage Faraday cages are metal containers or meshes which protects against static and non static electricity. As a note... Top Gear also tested this in laboratory conditions with an artificial lightning generator and Richard Hammond ...


7

To be honest, the most important thing a Rescue Team needs to have is plenty of manpower (and womanpower!) with training and experience (speaking as a member of a UK Cave Rescue Team).


7

In my opinion you should also take the hybrid helmets into account. As far as I know, hardshell helmets are more robust than foam ones but they are heavier. That's also the reason they invented the hybrid, to get a compromise of both. Hybrid has a thinner hard outer shell (lighter than the extremely robust hardshell helmets) to protect against deformation. ...



Only top voted, non community-wiki answers of a minimum length are eligible