Mastering the Art of Passing Knots in Rope Rescue

Passing knots during a raise or lower is a fundamental skill in rope rescue that requires precision and planning. While it may initially seem complex, the process becomes second nature with practice and understanding of the core steps.

Reasons for Passing Knots

There are two primary scenarios where passing knots becomes necessary:

1. Extending Rope Length: When ropes are too short to reach the ground, joining them with a knot allows the system to accommodate the required distance.
2. Managing Rope Damage: If a rope becomes damaged but still needs to remain in use during an evacuation, passing a knot ensures the operation can continue safely.

Knot Passing On A Raise and Lower Using The MPD

Although it’s ideal to perform this task in controlled conditions—such as on the ground—real-world rescues often demand knot-passing while the system is under load. These situations require careful planning and execution, particularly when dealing with adverse conditions such as poor visibility, rain, or team fatigue.

Planning and System Setup

For rope rescue systems, proper planning is critical to ensuring efficiency and safety. Using the Two Tension Rope System (TTRS) or Dual Capacity Rope System (DCRS) is a preferred approach for many rescue teams. Unlike the Dedicated Main Dedicated Belay System (DMDB), TTRS allows for greater flexibility and redundancy in operations. To learn more about these systems, search for “twin tension” in the Rigging Lab Academy library.

When passing knots, it is essential to stagger the TTRS lines so knots are not passed simultaneously. This prevents unnecessary risks and simplifies the process, particularly in high-stress environments.

Techniques for Passing Knots

There are many methods for passing knots, each with potential modifications depending on the equipment and situation. The basic principles include:

• Maintaining load safety during the transition.
• Ensuring smooth rope handling and system stability.
• Using equipment and techniques that suit the specific rescue scenario.