What risk is associated with dynamic (high-stretch) rope in most rope rescue applications?

• A. Unpredictable elongation under load can transfer higher shock to anchors and equipment; static rope is preferred
• B. It is cheaper
• C. It is heavier than static rope
• D. It cannot be used for ascent

Answer: (A)

Dynamic rope stretches a lot when loaded, which means it can absorb energy but also can transmit a sudden, unpredictable shock to the anchors and hardware when the load is arrested. In rope rescue, that unpredictable elongation can create peak forces that exceed what anchors or gear can safely handle. Static or low-stretch rope has more predictable elongation and lower shock loads, so it’s preferred for mainlines. The other factors listed (cost, weight, or ascent ability) are not the primary safety concern in this context.