... Enables you to carry several feet of parachute cord easily and call for help, which can help ... knots. The center folded strands are the filler cord, and you tie your knots with the two ... Left side goes over the filler cord, then under the opposite cord, then take the right hand side, ... cord goes over the filler cord, and under the left hand cord. Pull tight, one square knot completed. Outdoor Survival 550 ...