by MoapaPk » Sun Dec 19, 2010 5:46 pm
First, I assume you are worried about conditions that will obliterate your tracks.
I've navigated too many whiteouts by map and compass. The first when I was 16, was on Algonquin Peak in the Adirondacks. I put pink yarn on the scrub balsam and a few rocks on the way up, and was able to find all but one yarn on the way down; but to be honest, the yarns were only confirmation, as I couldn't see them till I was right on top of them. Nowadays people would frown on any such marker.
The scariest was on Santa Fe Baldy, when 1.5' of snow fell during the ascent, obliterating our tracks. We found that we could see the faint depression left by 4 sets of snowshoes if we went about 20' to the side and looked at a low angle, even though the route was now covered with new snow. Using a compass and map was an experience; the map flapped uncontrollably in the wind, and the compass face was unclear through goggles and blowing snow.
The last two times I've been in whiteouts, I used a GPS, and it was so, so, so much less creepy. If you are above timberline, you won't have an issue with tree cover. The clouds and snow have an absolutely trivial effect. Always use Li metal batteries in a GPS in cold weather -- if there is any chance of whiteout or epic days -- and always have at least one spare set of Li batteries in your pack. (Some gps now have rechargeable Li-ion batteries-- not as good in cold, usually short on battery life, and usually not replaceable en route.) And be experienced with the gps before you first take it out in whiteout conditions. For a day climb in the White Mountains, just let the GPS record a continuous track as you go. Modern GPS will last at least 20 hrs of continuous recording on one set of AA Li batteries, even in sub-zero T. (Alkaline and NiMH batteries do much, much worse in the cold.) If you want, you can put an external antenna on your pack or shoulder, and keep the GPS inside your coat till you actually need to consult it. Put some waypoints in before you go, labeling each with mileage. If it is dark, try to use your headlamp to illuminate the GPS face, as the backlight eats up batteries quickly.
IMHO, it would be nutty to make the climb at night if there were a whiteout. In a raging whiteout, even during the day, you have no good sense of direction; you can't even perceive slope. I remember just heading for any dark object. Also consider if the champagne is a great idea.