The Twin Tension Knot Pass with a Prusik Hitch is a valuable technique used in rope rescue operations to manage mid-line knots during lowering or hauling. This method maintains load control, enhances system redundancy, and ensures continuous rope operation through safe, structured load transfers. Especially effective when paired with devices like the CMC Clutch or Petzl MPD, this approach can be adapted across various twin tension configurations.
Step-by-Step Guide to Twin Tension Knot Pass with a Prusik Hitch
Step 1: Pause Lowering
Stop the descent when the knot nears 0.5 meters above the descent control device. This ensures there’s enough space to work the knot past the device without interference or jamming.
Step 2: Attach a Prusik Hitch to the Anchor
Install a prusik hitch on the loaded rope, just above the knot, and connect it to the anchor using a load release strap or adjustable redirect. This acts as a temporary load-bearing element, relieving tension from the descent device.
Step 3: Transfer the Load
Carefully resume lowering until the full weight transitions to the opposite rope system. Once the primary rope is unloaded, remove it from the Clutch or MPD, and re-thread it so the knot now sits below the device.
Step 4: Disconnect the Prusik Hitch
With the load transferred and rope re-positioned, disconnect the prusik from the anchor and untie it. Ensure the line is clean and free of friction points or twists.
Step 5: Resume Lowering and Equalize Tension
Begin lowering again, allowing both ropes to re-tension equally, restoring the system to its original twin tensioned configuration. Monitor system symmetry and make fine adjustments as needed.
Why This Technique Matters
This technique emphasizes redundancy and real-time control while managing rope transitions. Unlike improvised methods, the prusik hitch acts as a dependable secondary load path, making it easier to conduct knot passes without requiring additional hardware or overcomplicating the system.
By training with this method, rope rescue teams develop:
- Greater versatility in knot navigation scenarios
- Stronger understanding of rope dynamics and tension management
- Increased confidence in managing dual-load systems
Whether used in a vertical evacuation, long lower, or complex terrain operation, the Twin Tension Knot Pass with a Prusik Hitch provides a secure, repeatable approach to solving one of the most common and potentially hazardous challenges in rope rescue.
For technician-level rescuers and NFPA 1006-aligned programs, this method is a core skill that supports safe, efficient transitions and elevates system awareness under dynamic conditions.
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