2013-05-01

Technical Ropes Rescue - Technician Level

Author: mbrewer

Last Thursday through Sunday I took a Technical Ropes Rescue course up in Hopland from Ron Roysum.

We went over some of the basic stuff too, but I'm going to start with the super shiny stuff :P.

The Cool Stuff


 photo DSC_01112_zps542b4570.jpg That's me, being the rescuer on an offset. This was the last setup we did, and one of the more complex ones. We were using a tree as a high directional (meaning something to have the rope come off above the ground). The total setup was >300 ft long, so we had ropes strung together and had to pass knots on the belay and mainlines. I was rigged to a pulley riding the offset line. I lifted the "patient" up to the pulley using a "set of 4's" that is, a set of 4 pullies resulting in a 4:1, and a prussick for progress capture. The offset line the pulley is on could also be lowered and raised by changing the tension at the bottom using another pulley system, allowing us to drop the rescuer down to the patient anywhere along the hill.

We got to play with all Ron's cool toys:  photo DSC_0149_zps95c9e1e4.jpg This is a "Vortex". Here it's set up as an easel tripod. You can see here that I'm working "edge" (or trying anyway). I'm helping the rescuer off of the side, watching the ropes as he goes down and adding edge protection where needed (to keep the ropes from getting damaged). That pulley system I'm messing (once I get it on the rope) lets the belay stay taught even before the rescuer gets down below the edge. Yet once he's below the edge it doesn't depend on the fancy tripod because I can lower it down to the ground. This way the belay acts as a proper redundant backup if the rest of the system goes once the rescuer is down over the edge.

We're using the tripod as a high directional to make crossing the edge easier on the rescuer. It's quite helpful when you've got 2 people or a litter you're trying to get over the edge. You can see the hobbling in the photo where we tied the feet together so they couldn't splay. You can also see where we pulled the back leg down hard into an anchor, holding the whole thing in place so it doesn't fall over the edge.

Below is the same Vortex system but rigged as an Sideways A frame and separate gin pole:  photo DSC_0159_zps61dabf67.jpg The side-ways A-frame gets used just like the tripod did, but needs a touch more guying. You can see the guy anchors coming out to the sides, carefully placed so they land about halfway between the legs thus pulling the frame hard down into the ground. In the image the rescuer is testing the system while edge helps him get everything set up. In this image it's easy to see the green rope leading out to the edge person. He has a Purcell prussic cord tied onto that rope, so he has some backup in case he falls off the edge by accident.

Then we had our Gin pole:  photo DSC_0156_zps2f47af89.jpg You can see here a bit of how it's rigged, and it's a fair bit of rigging. We were aiming for 3 guy lines but messed up the angles and had to do 4. Two of the guy-lines you can see are tripled, while 2 are not. The tripled guy lines are for tensioning, they are basically just 3:1 pulley systems, but with just beaners and no pulleys. The 3:1 is then then muled off like a radium release hitch. We placed these so they'd be the guys that get heavily loaded. The 3 lines will help reduce stretch. The single guy-lines run down to prussic cords at the anchor, this makes getting the length right a lot easier since we can pull the rope through the prussic. The rope is then muled off for security. Note that the entirety of the gin pole rigging is done with one (long) length of rope.

We were using the gin pole as a redirect just so it was easier for the person operating the mainline. They get to stand up this way. I should note that a lot of the rigging here is excessive. We were doing fancy rigging for super comfy work so we could practise doing it all. You might do this on a body recovery, but probably not on a normal rescue. Setting this all up takes a little while. On the other hand, you might *need* it for a complex rescue, and that's why we were doing it here.

And just because I had no idea how this would really work out in practise, I have to include at least one picture of a litter scoop. I'm playing the idiot who screwed up his rappel and apparently is sufficiently injured he needs a litter :P (rather than a pickoff like I did as rescuer on the offset line).  photo DSC_00692_zpse9a046a9.jpg Here the rescuer is attached to the anchor point of the litter via a set of 4s again. This pulley system lets him go up and down relative to the basket. This was especially important for my rescuer who had quite short legs and needed to drop down a bit to be able to hold the litter out from the wall as we were raised back up. You can also see a second set of 4s being used to change the angle of the litter, the litter was brought nearly vertical to get me in, then pulled up horizontal.

This brings up an interesting question, who do we raise the rescuer and patient back up?:  photo DSC_0148_zps187692c0.jpg In this photo we're raising a single person on a simple 3:1 system. When we had a 2 person load we generally did a bat-wing 9:1 system. A 9:1 batwing is really just 2 stacked 3:1 systems with a redirect in the middle (In the system I showed with the gin pole, the gin-pole was the redirect). The second 3:1 system needs a really long haul field (distance to the anchor), otherwise you collapse that system (use up all the rope so the pulleys hit) 3 times for every one time of the other system - this makes for lots of resetting the system, which is slow.

Here you can see a simple 3:1 system. The line running back toward us is the "tail", that is the end you'd tie to your load to. The line the man is holding is the end you haul on. The device tied to the tree in the photo is an "MPD" (multipurpose device) which is just a super-fancy pulley and progress-capture system (think ratchet, it's not but that's the idea). On haul it fills the same roll as a pulley and prussic. Note that the pulley closest the camera is attached to the tail or load line via a prussic hitch. When the system collapses and we run out of rope, we just stop. The progress capture holds the load, and we run that prussic back out down the line again.  photo DSC_0049_zps4af4ab8b.jpg

Other stuff

Some of the less sexy stuff we learned and practised were various ways to tie anchors. Lots of knots. Rappelling and swapping to an ascend and back. Swapping a lower system to a raise and back again. Placing rock pro. Angles and the forces those imply, which is something you always have to keep in mind. Safety margins and the like. Calls to make to cross-check things. We always had someone in charge of safety, and we all practised the common roles involved in a vertical rescue (IC, edge, rescuer, belay, mainline, haul team, and safety).

I keep saying the word "belay", I should probably explain what that means. A "belay" is a *backup*. So, usually in rescue you have your mainline. This mainline may go through a high directional, you might have crazy pulley systems on it, and all sorts of stuff. The belay line on the other hand is generally simple. The idea is to be fully redundant if we can be. It's often on a separate anchor, uses a separate line, and depending on the harness may even tie into a different loop on the harness. In rescue there are a lot of tradeoffs and massive redundancy isn't always the right choice. Expediency can really matter and all the redundancy costs. So you don't *always* have an entirely independent belay line. Sometimes a rescuer might simply rappel down on a single "fixed line" even, if the goal is to get a rescuer to the patient as fast as possible. We talked a lot about these tradeoffs.

Ron was awesome, as was Dwayne the other teacher. I ended up camping on Ron's land for 2 of the nights. We had beers and spaghetti at his house on Saturday. It was generally a ton of fun. Lots of joking about during breaks so it felt comfortable, but didn't interrupt the learning at all. We had folks down from the Yukon and up from Arizona. Incredibly knowledgeable people who were just a blast to hang out with. The first 2 nights I practised my boondocking skills and found a campsite myself up on a hill down a dirt road about 20 minutes from the original meeting location. It was absolutely gorgeous. Sadly, I didn't take any pictures of it, but suffice to say that laying up there and reading a book in the evening I was very happy that I would be spending a lot more time outdoors in the near future.

This field is *enormous*. I learned a lot, but I'm still only scratching the surface of complex ropework. Having done some somewhat more complex stuff I'm now pretty confident I can do the simple stuff. But there is always tons more to learn.

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