The American Mountain Guides Association and Outdoor Research have teamed up to put together some really high quality videos. In this video, AMGA Instructor Team Member and former AAI Guide Larry Goldie demonstrates how to back up a snow picket in a crevasse rescue.
It is uncommon for me to feel like a single picket is good enough for a crevasse rescue. It's pretty dangerous to put all of your eggs in that one basket.
The block and tackle is the best way to get something close to equalization. But it is also possible to measure out the distance of the wire on the second picket to the master carabiner on the first picket. This "estimation-style" isn't as good, but will work in a pinch.
--Jason D. Martin
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