This European Standard specifies requirements, test methods, marking and information to be supplied by the manufacturer for descender devices, which include descent lines (hereinafter referred to as lines), intended for rescue and to protect against falls in a rescue system, which is a personal fall protection system. This European Standard does not specify requirements for descender devices that are used for descending in mountaineering, rope access or work positioning systems. NOTE A descender device which enables the user to rescue himself and which conforms to this European Standard is personal protective equipment (PPE).