In high-angle tower rescues, distance and clearance are critical. When the objective is to move a suspended patient away from a structure and across a distance, twin tracking lines offer a clean and redundant solution. This scenario demonstrates a Twin Tracking Line Power Control Rescue, designed for extended horizontal offset and mid-air patient control using two tracking lines and tower-based team operations.
Why Twin Tracking Lines?
The system shown here uses two tracking lines instead of one for several reasons:
- Redundancy: In the event of a single tracking line failure, the second line prevents catastrophic swing or drop.
- Clearance from Structures: The lines guide the patient away from the tower, reducing the risk of collision during descent.
- Rope Length Management: When rope length limits the use of hybrid or skate block systems, tracking lines allow for more flexibility in vertical reach.
This method is ideal when the patient needs to be transported across horizontal terrain—over parking lots, fences, or large obstructions—and where traditional up-down systems aren’t feasible.
System Overview
Ground Setup
- Two tracking lines are anchored from the ground and routed to the top of the tower.
- Tension is applied at the base via hand-tensioning or pulley systems.
- A Petzl I’D, MPD, or riggers winch may be used to adjust tension and secure lines.
Topside Anchor and Patient Connection
Two rescuers are deployed:
- Rescuer One climbs with a belay and tracking line.
- Secures a Petzl ASAP and belay at the top.
- Assesses and connects the victim at the sternal D-ring.
- Rescuer Two climbs with a second belay and tracking line.
- Anchors both lines near the same plane (different anchor points for redundancy).
- Sets up a dynamic anchor with Petzl ID for the lower.
- Lifts the patient and assumes control.
Once both tracking lines are attached and tensioned, the ground crew confirms load readiness and gives the green light to lower.
Operational Flow
- Climb and Anchor: Rescuers ascend, set belay and tracking lines.
- Patient Assessment: Rescuer One evaluates the patient and connects to the belay.
- Rescuer Two Loads Patient: Using a dynamic anchor system, lifts patient off fall protection.
- Tracking Line Connection: Patient is attached to both tracking lines.
- Ground Control Tensions Lines: Lines are pulled into tension, providing the lateral offset.
- Lowering Phase: Upper team lowers the patient via Petzl ID and monitors position.
Key Takeaways
- Twin lines = redundancy and safety.
- Ideal for long-distance offsets and tall structures.
- Requires tight coordination between ground and tower teams.
Peace on your Days
Lance
