At the American Alpine Institute, we teach two kinds of rescue programs. The first are self-rescue programs. These are programs and lessons that will allow a technical climber to perform a rescue of himself or his partner with the tools he is carrying. The second kind are team rescue programs. These are program where a team of rescue volunteers or professionals work together with specialized gear to perform a rescue. We also call this "rope rescue."
In self-rescue the most common releasable hitch is the munter-mule. In rope rescue - a place where the loads are much greater - the most common load releasable hitch is the radium release.
Like most hitches, there are several ways to tie them. The radium release is no different. But the following video provides you with a basic understanding of how to tie this hitch.
At the end of the video, the demonstrator puts the hitch into a bag. It's interesting that certain populations in the rescue community feel the need to pre-tie everything. It is our belief that a rescuer should have the essential knots and hitches so dialed that they can put them together upside down, wet, or whatever...
--Jason D. Martin