The Technique of Travel : Page 143
Expedients for Steep Terrain
High-angle climbing on snow, ice, or rock, with its requirements of advanced rope technique, ice ax, crampons, and pitons, is beyond the scope of this chapter. A ski tourer should ordinarily be able so to select his route that he avoids steep terrain requiring advanced technique. In no event should a party go beyond the limit set by its ability or equipment. Below are suggestions of ways by which the ski tourer can improvise from his ordinary equipment and technique the means to cope with moderately rough terrain. (See chapters 2, 15, 16, 17 for mountaineering equipment and technique.)