Snow Formation and Avalanches : Page 214
Precautions when danger exists.—Having selected the safest place to travel, if danger still exists, the following additional precautions should be taken:
The members of the party should travel at a sufficient distance apart, so that an avalanche would carryaway only one of the party, leaving the others availablefor search. This frequently means a spacing betweenmembers of not merely a few yards, but of one or twohundred yards or more. Occasionally this rule of separation may have to be abandoned when visibility is poor,owing to the danger, possibly greater, that some of themen may lose the route.