I signed up for the Mountaineers ski crevasse rescue class which ended up being a really worthwhile way to spend a few weekday evenings and a weekend field trip. We learned about basic glacier travel, route finding, and especially crevasse rescue pulley systems. The purpose of learning the system is to be able to haul a potentially injured skier out of a crevasse on a rope using mechanical force advantage.
For our field trip we spent a rainy Saturday refreshing self arrest skills and practicing roped travel in Paradise environs at Mt. Rainier. On Sunday we spent a beautiful sunny day hauling each other out of a real-life crevasse on the Nisqually! Here are a few shots: