What limitation do crew members face while inserting cribbing?

When inserting cribbing, crew members are primarily focused at ground level, which presents a significant limitation. This focus is critical as it helps them position the cribbing materials accurately to stabilize the vehicle, but it also restricts their view of the broader scene. As a result, they may miss important visual cues regarding the overall position of the vehicle, its stability, and potential hazards that are not immediately in their line of sight.

While the other aspects, such as access to tools, awareness of noise, or visibility of the vehicle's overall position can play a role in the rescue operation, the specific limitation tied to focused attention at ground level directly impacts the effectiveness and safety of cribbing operations. Proper cribbing requires careful placement to prevent further movement of the vehicle, and not being able to observe the overall scene can increase risks for both the rescuers and patients involved.