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If a waterproof sheet is used, be sure it slopes fordrainage and is well anchored with snow blocks or othermeans to prevent the wind's ripping it away. If a brush roof is used, cover it with snow if theweather is cold to keep in the warm air; but if the airtemperature is near or above freezing do not do this asotherwise melting snow will drip, drip, drip. If an open-front shelter is used be sure an all-nightsupply of wood has been gathered. And just in case youget tired of stoking the fire, or a storm douses it, haveenough brush or snow blocks handy to close the entrancecompletely. Trench bivouacs can be constructed in any size.The simplest is the one-man type, 31/2 by 21/2 by 7 feet,which can be stamped or kicked into the snow and linedand covered with fir boughs in about half an hour. |
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