In complex tower and vertical rescue scenarios, flexibility and redundancy are non-negotiable. One highly adaptable configuration is the hybrid horizontal rescue setup that combines a skate block line over a tracking line. This method allows teams to precisely manage both vertical descent and lateral movement while maintaining backup safety protocols throughout the evolution.
System Overview
At the heart of this setup is a dual-purpose rig that integrates two systems:
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Tracking Line (Red Line): Anchored above and tensioned to the ground using a Petzl I’D. This line provides directional control and allows the patient to “float” across or down varied terrain.
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Skate Block Line: Routed cleanly through a double pulley, the skate block line offers mechanical control over descent and lateral movement.
Using a double pulley provides a neat, centralized point of control. However, the setup could be adapted with separate pulleys for each line depending on available equipment and team preference.
Patient Connection Strategy
The patient’s primary connection is made at the sternal D-ring using scaffold knots and carabiners. This connection point is shared by both lines, with deliberate redundancy.
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The tracking line includes a Petzl ASAP, which acts as a passive safety catch. If the skate block line fails, the ASAP arrests the descent by locking onto the tracking line.
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Conversely, if the tracking line fails, the patient remains suspended by the skate block line. While this could cause a minor drop due to slack or system sag, it should not result in a catastrophic fall.
Key Considerations
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Redundancy Without Over-Tension: The setup avoids adding an extension (e.g., a sling or prusik) between the sternal D-ring and the ASAP. Doing so could preload the ASAP and cause it to travel under tension—something we want to avoid. Instead, a short direct connection ensures the device floats freely until needed.
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Dynamic Movement and Control: Because the system operates in a suspended and movable state, coordination between the top and bottom teams is crucial. Both descent and lateral drift must be managed in sync.
Why This Matters
This hybrid horizontal rescue setup exemplifies layered safety. It allows a rescue team to adapt quickly to unpredictable environments, providing both control and backup in case of primary line failure. While slightly more technical to rig, the increase in margin of safety is invaluable in tower rescue or other high-risk vertical scenarios.
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