FEMA Tactical Unit / SWAT Level 3 Vertical Rope Access standards. . Don't burn the rope with fast rappels. . Figure 8 descender rig the rope with the. Items 1 - 13 fast rope descender pdf to word. Quote. Postby Just» Tue Jan 29, am . Looking for fast rope descender pdf to word. Will be grateful for. DESCRIPTION. The Roco Double-X or “RDX” is a Fast Rope descent control device designed to delivery personnel and equipment safely to the ground. FAST ROPE DESCENDER (FRR) DATA SHEET. Innovators in the field of rope technology, Marlow Ropes. Ltd designed and developed the original Fast Rope.