Shift Handoff Protocols for Sound-Derived Geometry Updates

After six hours underground, rescue teams are required to rotate — the Western Canada Mine Rescue Manual codifies three-team rotations for exactly this reason. The handoff moment is where geometry knowledge gets lost, and an incoming squad that does not inherit the outgoing squad's spatial picture repeats work the previous shift already did. Structuring the handoff around the acoustic map is the fix.

The Western Canada Mine Rescue Manual specifies that after six hours of rescue work, a three-team rotation must be in place. Peer-reviewed Evidence-Based Guidelines for Fatigue Risk Management in EMS documents the cognitive cost of extended duty and lays out handoff protocols and fatigue controls. Research in Occupation-Induced Fatigue and Impacts on First Responders shows reaction time and decision-making decline measurably after 12 hours on duty. The National Response Team's Emergency Responder Fatigue Fact Sheet frames handoff as the most fragile moment in any sustained response.