During a rescue, what is a primary concern when using a 3:1 direct haul system?

When utilizing a 3:1 direct haul system during a rescue operation, one of the primary concerns is rope entrenchment in the crevasse edge. This risk arises because the angle at which the rope is routed can lead to it becoming pinched or trapped along the edge of a crevasse or other vertical surfaces. Such entrenchment can create additional hazards, including the potential for the rope to cut or fray due to friction against sharp edges or to impede the movement of the rescuers.

This concern is crucial as it directly impacts the effectiveness and safety of the hauling operation. If the rope becomes entangled or jammed, it can cause delays in the rescue and may endanger both the victim and the rescuers. Therefore, recognizing and mitigating the risks associated with rope entrenchment is essential during any rope rescue scenario.