Rapid Deploy Ridge Lines give you the ability to string a quick shelter with a tarp. Just need a couple of trees, or a couple of stiff sections of branch to use as poles and a few Guy Lines. Fewer headaches for set-up since the toggles and Prusik Knot Loops stay with the set-up for rapid deployment.
Other uses for the ridge line is to have a make shift clothes line for drying things out in the sun. Or, create a privacy screen with a tarp hanging off the ridge line.
Have two/three ready made of about 30' in length, and you have some options for more than one need, and quickly making them. Just like with the Guy Lines, hank 'em up for tidy storage and tangle free deployment.