No?Originally Posted by LiteHedded
Let's have an example:
3 teams of 3 divers each diving the system.
Zero visibility on the way back.
3 intersections.
How is having each diver negotiate 9 cookies X 3 (= 18 cookies) on the way out in zero visibility fast / efficient?
Negotiate a line marker? You feel the cookies and you go that-a-way.
Each person placing a cookie actively involves each team member in the navigation process. Nothing is passive "follow the leader", it requires a physical act.
Another benefit is if the team gets separated. John Doe is missing, and the search can no longer continue. Presumably, John is looking for his dive buddy, Jane Doe. One of them will come to the last nav decision first (if they get there at the same time, problem solvedand pulls their own cookie. If Jane gets to her cookie and sees that John's isn't there anymore, she knows John is on the way out. This is a good thing.
first of all, the odds of the ever elusive 'zero visibility' persisting over three intersections is exceedingly rare in my estimation. and in a passage like that I probably wouldn't have a three man team.
I've negotiated intersections in zero vis before. you pick up your cookie and go on about your business. if the extra time it takes for your team mates to pick up their cookies is the difference maker you need to re-evaluate your gas plan...or your teammates.
zero visibility on the line is probably going to be a tad slower. this shouldn't be an issue. there's no need for the team to be scrambling for the exit.
Narcosis?? Insidious and subtle??? Have you been watching too many Sea Hunt reruns, or what?
"Have you ever noticed
When you're feeling really good
There's always a pigeon
That'll come shiat on your hood?" John Prine 4-7-2020
"Into the blue again; in the silent water
Under the rocks, and stones; there is water underground" Talking Heads
Cousteau said the best protection against narcosis was to have a plan that included a safe exit. He didn't intend this for cave diving, but the idea would be the same.
If the plan was to see how deep you could get, then you kept going, until you died. If the plan was to go down to a specific point, then return to the surface, chances of survival where greatly increased.
I suspect it is a lot harder to plan for a class, than an ordinary recreational cave dive. Add narcosis to that, and it is easy to see how mistakes could be made.
One good clue is, what else do you remember about "deep" dives. If you remember shallow dives better than ones below 100', then it could be narcosis.
how do you know it is your cookie you are "feeling"?
Well, If there's a pattern, that's a different story. I thought you were basing your conclusion on that one occurrenceIf you really do very stupid things that often at 100feet, you should definitely get some helium into your mixes and see if that helps.
Well, if I come to this magical zero vis intersection that I think should be a left, my cookie is on the left, and there isn't one on the other side...I'd say its mine. Past that, I put it up to my mask and read my name on it. If the vis is so bad I can't see it, there are cookies on each side of the intersection and i don't have a clue which way to go, I can chill for a second, let this vis clear a bit, then hold it up to my mask.
Rocket surgery, it ain't.
After making sure it was your cookie (1 out of 9) you picked, not someone else's, I presume...?
Lol, 9 divers in a silt tunnel. Right. I think you're e-diving here.
Losing a cookie is not the end of the world, anyway. Its a dollar (a single...dollar...).
Posting Permissions
Reply With Quote
Bookmarks