Fisk Descenders are components of a rope descent systems commonly used in work positioning and rescue operations. For descent applications, the Fisk Descender is used as part of a complete descent and personnel riding system. A descent application configuration typically includes a full body harness, boatswain’s chair or workseat, independent personal fall protection system, and the Fisk Descender with working line. For rescue applications, the Fisk Descender is used as part of a complete rescue system which would typically include a full body harness or rescue sling, anchorage connector (i.e. carabiner) and the Fisk Descender with working line.