Originally Posted by
nanok
the idea is to replace the loop of the truckers hitch, which you would normaly tie in the mainline, with a loop that you can slide wherever you want, and that can be opened and closed at will. the uni shackle provides a tail to form the friction hitch on the main line (i prefer the blake, but it could be another), and the other end is the closable loop. the working end comes back from the tree, and you close the loop of the uni-shackle around it (so you don't need to put the whole line through a loop, the loop closes around it), then you use it exactly as a normal truckers hitch: same 3:1* advantage, same method to lock it off, etc (this is for the simple method to solve the trouble you had during the storm, if adding a second shackle to make a self-supporting truckers hitch, that would provide "progress capture", that's a bit different.
*3:1 is theorethical, iirc some experiments showed that, when making the truckers hitch with rope only, due to friction the real mechanical advantage is closer to 2:1 (still nice though)
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