My rig SAR design as gotten a bit of interest when I brought it along it at a SAR convention recently and I was asked if it was suitable for long-line. Unfortunately my team doesn't do that (I wish!) so I don't know much.
Design-wise, are there guidelines or a certification for that? I assume avoid snag hazard and having a breaking strength such that if it gets caught somewhere, it'll break off? Dummy-cording attachment points for radios/GPS?
If not, perhaps something like that for jumpable gear, if it exists, could steer me in the right direction?