A review of the calculations and Table 1 in this report indicates that an initial coarse probe depth of at least 3 meters is desirable. A review of Table 2 indicates that initial use of the coarse probe is clearly justified. For the smaller avalanche, it also shows significant gains in the victim's chances with repetitive use of the coarse probe. For larger avalanches,, the gains in repeating the coarse probe are not as significant the rescue leader may feel justified in going to the fine probe after one coarse probe. However , a review of Figure 3 indicates that rescue groups can increase the victim's chances by first efficiently searching probable subregions.
Every avalanche rescue is a different problem in itself.
However, probability calculations based upon a general, or average, avalanche occurrence gives well supported answers to the questions. Supporting Data and Calculations Applying these three questions to a general avalanche disaster and thereupon attempting a general solution would be a tedious mathematical exercise. Certain factors such as the size of the avalanche, the density of the snow, and the time interval between the avalanche and the initiation of probing would be carried as variables, The problem is greatly simplified if these factors are preset. Large avalanches, high density snow, and long rescue approach marches all reduce the victim's probability of being found alive. The avalanche size facilitates a coarse probe time of an hour or less.