Re: Pull and glide vs ???
Quote:
Originally Posted by PerroneFord
Ok, newbie question here.
In cave training, students are hammered with the idea of cave conservation and preservation. We are admonished for putting hands down, feet down, feet up on the ceiling, etc. Have been a dry caver from a young age, and a former employee of DEP, I take conservation of natural resources quite seriously.
But that leads to an interesting problem for me as a new cave diver. When is it ok to touch the cave. I remember struggling to try to get through Devils to the lips. Getting absolutely hammered because I didn't know the good line to take in, and I was running the reel. I remember doing Little River on the final day of class, and being told to use pull and glide through certain areas to make reasonable forward progress.
Clearly, silting is not a concern in these high flow areas but how does a diver, new to caving, make the deliniation as to when it's ok to pull and glide, and when it is not? Yes, I wil pose the question to my instructor, but many here are also intructors and many who are not have a wealth of experience and knowldege.
So what say you?
Good question that sometimes doesn't really have a rule of thumb. If you have to pull and pull,versus gilde then it may be more appropriate. There is one high flow system I dive that because of the amount of fragile goethite,I just suck it up and swim. Somewhere like Little River has harder limestone that isn't as brittle to hand contact where the cave can tolerate pull and pull.
Re: Pull and glide vs ???
Quote:
Originally Posted by PerroneFord
use pull and glide through certain areas to make reasonable forward progress.
So what say you?
Pull and glide is very efficient. I use it by preference whenever it seems appropriate.
In well traveled areas you will find established pull spots already in the cave from the dozens of divers in ahead of you. Using only well worn pull locations takes little effort to figure out where the best hand holds are, reduces wear and tear on the cave and reduces the chance that you will pull on a weak formation and rip off a piece of the cave or damage additional area.
I stick to the established handholds. If a good flood comes thru and dirtys up the cave and there are no freshly used handholds then I avoid pull and glide (yes I know where the handholds will eventually be worn but I don't want to contribute to the damage).
When I put my hand out for a pull my 3 middle fingers hook the handhold - kind of previewing the spot for a pull. Some clay formations look like well worn rocks, some rocks shift under light pressure, or you can feel a crunch as you start to apply pressure and you destroy delicate formations on the surface of the rock. :cry: Lightly grabbing and starting to apply steady pressure can allow you to abort a handhold hopefully before excessive damage is done.
The first 2 fingers are mostly for tactile testing of the handhold. Usually I only use the 1 finger to pull with - the leftmost of the 3 middle fingers (also the finger with glove protection). In many caves the rock is pretty rough and gripping with a whole hand and then sliding off chews the fingertips of your whole hand. Hooking, steady pull and firm pushoff with one finger reduces the chewed up fingertips, surface area of the rock being worn, etc.
I find careful, skillful scootering can produce less wear and tear on a cave then pull and glide. With good buoyancy skills and a light, maneuverable, underpowered scooter (like a mako) set on low power the scooter can provide direction and propulsion in places one would be afraid to contact the cave at all or even fin for fear of stirring up silt. I don't see many scooterers applying them in that fashion.
Slow swiming is usually the best alternative to pull and glide. Avoiding the center passage where the flow is highest, cutting to the inside of the turn, shadowing behind rocks that break the flow and just learning the cave passageway in general to find it's unique personality. Often there is a low flow path or alternative to many high flow passages.