What is the most critical aspect of crevasse rescue for a team of 3-4 climbers?

The most critical aspect of crevasse rescue for a team of 3-4 climbers is arresting the fall of the fallen climber. In a crevasse rescue scenario, the immediate priority is to prevent further injury or danger to the climber who has fallen into the crevasse. The effectiveness of the rescue operation relies on quickly stopping the fall to minimize risk and set up for a successful recovery.

Once the fall is arrested, the team can then focus on building anchors and performing techniques to raise the fallen climber safely. While building a snow anchor system, practicing self-arrest techniques, and maintaining clear communication are important components of a well-executed rescue, the primary concern in the event of a fall is to halt that fall as quickly as possible. This ensures that the climber remains safe, which is crucial for any further rescue efforts.