A Rescue System Rope That Floats. Intended for high-load applications that normally call for a lifeline, but also require a rope that floats, our New England River Rescue Rope is compatible with Prusik hitches, Gibbs ascenders, pulleys, and other rescue hardware. Its core is polyolefin covered with a tough, abrasion-resistant nylon sheath. Rope is sold by the foot. Please contact customer support for maximum length available. WARNING: Technical Rescue and Safety is potentially hazardous.