ISC D2™ Escape Descender
The ISC D2TM Escape Descender is a new and innovative ‘double-stop’ Descender. The ‘double-stop’ function means that the D2 Descender has a sweet spot in which the descent speed can easily be controlled. Either side of the sweet spot there is an auto-lock function – when the user lets go of the handle the device automatically stops and when the user pulls the handle too hard the device automatically stops, (often referred to as a ‘panic-stop’).
Developed with a new handle operated cam system specifically so that in a panic situation the Descender would actually stop the descent, (rather than just slow it down). The D2 Descender is the only Micro-Descender in the world to offer this function.
The D2 can be controlled by pushing in the cam (ideally using the thumb), which allows the user to smoothly feed the rope through the device, without the use of the handle. The cam feed feature is particularly useful in Bail-out Operations. It is also easy to back-feed the rope through the D2 and therefore it can be used for smooth ascending or for emergency hauling, (when used as part of a 2:1 ‘Z-rig’). The Descender is compact and lightweight, allowing it to be carried on the harness at all times – some harness manufactures have integrated it into a harness back-pack so that self-rescue can be made easy.