Using a Double V Anchor System for Twin Tensioned Rope Systems

The V anchor system is widely regarded for its simplicity and versatility. As demonstrated by Richard Delaney from Rope Lab in collaboration with Rigging Lab at Rescue Response Gear, this adaptable setup can be expanded into a double V anchor system for lightweight wilderness rescue and twin tensioned rope systems. This guide explores the application of the double V anchor and its benefits for raising and lowering operations.

1. Expanding the V Anchor for Twin Tension Systems

The traditional V anchor system provides a single focal point for anchoring rappel lines or top rope setups. In twin tensioned rope systems, the V anchor’s design can be duplicated to create two separate systems, each operating independently.

• Why Twin Tension Systems?
  Twin tension systems are increasingly used by rescue agencies worldwide for their load-sharing and safety redundancy benefits.
• Why Use a Double V Anchor?
  Instead of carrying heavy rigging plates or hardware, the double V anchor can be built with basic gear, making it ideal for lightweight wilderness rescue operations.

2. Setting Up the Double V Anchor System

Step 1: Build the First V Anchor

• Select two independent anchor points (e.g., trees or bolts).
• Tie isolated strands using figure-of-eight knots, securing each to a locking carabiner at the focal point.
• Ensure the system is under equal tension to prevent slack.

Step 2: Add the Second V Anchor

• Use a second rope to replicate the first anchor system, placing it approximately half a meter apart for ease of access and operation.
• Create identical figure-of-eight knots for the second anchor, securing them with locking carabiners.
• Adjust the focal point for both systems to keep them parallel but independent.

3. Adding Edge Safety Lines

Safety is critical in vertical and technical rescue operations, where attendants often work near the edge. Use the spare ends of each anchor line to set up cliff edge safety lines:

1. Tie a figure-of-eight on a bight at the end of the spare strand.
2. Throw the rope toward the edge, then pull it back to secure it at the anchor point.
3. Repeat for the second anchor line, creating two safety lines, one for each side.
4. Secure the safety lines to separate anchors for redundancy.

4. Practical Considerations and Devices

The double V anchor system supports separate belay or haul devices for twin tension systems. In this demonstration:

• A CMC Rescue MPD is used on one line.
• A Petzl ID is used on the other line.
• Each line operates independently, ensuring redundancy and safety.

5. Benefits of the Double V Anchor System

• Lightweight and Adaptable: Requires only two ropes, a handful of carabiners, and basic knots to set up.
• Independent Systems: Each anchor and device operates separately, avoiding single points of failure.
• Safety Enhancements: Includes edge safety lines for attendants and redundancy in anchor points.
• Versatility: Can be used for raising or lowering loads in wilderness or urban rescue scenarios.

6. Training and Practice

While the double V anchor system is simple to set up, operating twin tensioned rope systems requires training. Rescuers must understand the:

• Benefits and limitations of devices like the MPD and ID.
• Effects of load-sharing and potential rope stretch on the system.
• Importance of consistent practice to ensure safety and efficiency.

7. Conclusion

The double V anchor system showcases the versatility of the V anchor setup, adapted for twin tensioned rope systems in lightweight rescue operations. With basic equipment and proper training, rescuers can establish a reliable and efficient system for raising or lowering loads. Its simplicity and adaptability make it a vital tool in the rescue toolkit.

Peace on your Days

Lance