@msbellows
I saw your mention of work in mountain rescue! When I was a volunteer crew member on tall ship Elissa at the Texas Seaport Museum in Galveston, I was trained in rig rescue. Our job was to get into this harness and be hoisted aloft to help should a crew member be injured in the rigging (80-100 feet above the deck) and unable to climb down.
This me in about 1989 on a training exercise. Luckily I never was called on to do it for real.