You pre-rig her on a single line (“A”), on the knot side, below the knot. You rappel double line, to the next station. Put line “B” through your rappel device and lock off. She raps line “A” against your ground anchor. You bottom belay “A” at the same time.
Of course, there is a complication in that line “B” is not long enough, you’re gonna run out of rope. So you gotta tie the end of rope “A” to the middle of rope “B” like above your head, and put “A” below the knot into your rappel device. In the unlikely case that you use the contingency and do some lowering, you are doing so in a loop. Gotta pull it back down and untie before pulling the rope.
However, different levels of concern and duties of care apply depending on the SO’s/client’s skill set.
Conclusion: guiding climbing much more involved than guiding canyoneering, especially non-flowing-water canyoneering.
Tom
Brian in SLC
Yeah, take the Behunin final rappel as an example. Wouldn’t work that well.
And, I’d be nervous having to manage a live rope with someone on it that’s not (knot) blocked. Rather stay up top at the anchor.
Or deep plunge pools…
Depends on the climbing too, though. Managing a crew that’s TRing versus anything but…
Fun to ponder…
ratagonia
I would too. I think the rappel with top-rope backup would be a good choice. Better is two guides. T
Brian in SLC
Typically not although there are several in the Zion area that are sorta multi stage.
There’s been a number in Europe where you rappel into a plunge pool and swim to a hanging station…wouldn’t want a client to do that. But, those types of canyons are mostly guided with more guides, methinks.
Yeah, coulda. Good idear. She has one of them Sterling anchor thingees that would work well for extending.