As stated in the past, we love Mike Barter's videos. The Canadian guide is currently doing perhaps the best job at creating instructional videos for climbing...and usually their pretty funny too!
Recently Mike posted a video on ratchets for rescue. One major component of any hauling system in a crevasse or rock rescue scenario is the ratchet. This is essentially the element of the system that allows the rescuer to retain any advantage that he has gained in the rescue.
Mike's video discusses four different types of ratchets:
1) Autoblocking Device:
Examples of autoblocking devices include the Petzel Reverso, the Black Diamond Guide ATC, the Trango GiGi and the B52. Each of these devices allows one to pull rope up through the device, but won't allow the load line to release without a few shenanigans...more on the shenanigans in a different post.
2) Garda Hitch
Also known as the alpine clutch, this quick system is very effective. However, it is extremely important to check that the hitch has been tied properly before using it in a rescue scenario.
3) Self-Minding Prussik
If you have taken a basic course from the American Alpine Institute, you know that we don't usually teach a means to create a self-minding prussik hitch. In the system that we teach, we leave the prussik cord a bit longer so that the rescuer can mind it himself. This is not quite as effective as either having a pulley that is designed to mind the prussik or a tube-style belay device that will operate the same way.
In the video, Mike also quickly demonstrates a way to make this prussik load-releasable by adding a munter-mule into the shelf. A load-releasable system is desirable in all rescue applications.
4) GriGri
The Petzl GriGri and the Trango Cinch are both highly underutilized tools for rescue. In part, it's because they are heavy, so a lot of climbers don't take them on long routes or into the alpine, but they are very effective. They work as both a pulley and a ratchet simultaneously and are -- by their very nature -- load releasable.
It is imperative that anyone going into the mountains has a rudimentary understanding of ratcheting in rescue. If you haven't had the opportunity to take a class, it might be very valuable to watch this video a few times over and to practice each of the skills shown...
--Jason D. Martin
