The Technique of Travel : Page 123
Side-stepping.—On steep, soft slopes, to avoid floundering—bringing the slope down to you instead of climbing it—leave as much space as possible between each pair of steps. This space usually provides enough support for the snow to keep it and the skier on the slope. Placing the lower pole just next to the lower binding will also help.
On steep hard snow, use of the lower pole next to the lower binding will prevent sideslipping down an other-
wise hopelessly steep and hard crust. The same technique will assist hard-snow traverses. Better purchase on the hard crust will be attained if the skis are swung sharply sidewise into the slope with each step.