Originally Posted by Mikensalem
I was just thinking What if you used the Amsteel for the tarp line and put UCR's on it to hang the hammock after the tarp went up. Amsteel's sag is minimal so the tarp and hammock sag should stay relative although the slight lowering when you get in the hammock will cause the tarp sides to go a little slack when the ground comes up ... somebody's bound to have tried it. it's raining here....
Hanging the hammock from a single line that goes from tree to tree is called a Single Line Suspension (SLS) of which there are about as many variants as there are people that hang that way.
I don't recall anyone trying using UCRs as the attachment points for the hammock ends, but don't see why that shouldn't work. The shifts the emphasis of use from adjusting the length of the suspension (now set to some fixed length) to adjusting the position of the attachment points, i.e., setting the sag. Usually once someone has figured out what sag they like then he leaves that part alone. I can imagine someone making an SLS with the hammock connection points being a loop whose (single) end is buried in the SLS like the end of an eye-spice is buried...but there the sag is set w/o easy adjustment.
As for connecting the tarp to this line, I think you'll find there is more drop when you climb in than you imagine, at least more drop than I read into your description <grin>, and that this approach is what the HH line of tarps use. Can be made to work it seems.