How much gas in case of accidental deco.

[DaleC]

I don't get the negativity towards computers myself. Ever experienced the human brain making an error? With the potential for task loading, exertion, narcosis, stress, and in my case poor memory and math skills, I enjoy having that sanity check which, if anything, errs on the side of conservatism. Remembering that we are talking about rec divers accidentally going into some limited deco, relying on math formulas done in the head is a poor option IMO. Such skills are only as good as the rate that they are practiced to be retained and I just don't see the average rec diver doing that.

 

[cascas]

Closing a manifold is ONLY done to isolate a tank that has an unfixable problem. At ALL other times it should be open (unless for valve drill practise). There is absolutely no (imho valid) reason to do otherwise.

---------- Post Merged at 03:05 PM ---------- Previous Post was at 03:00 PM ----------

I don't get the negativity towards computers myself. Ever experienced the human brain making an error? With the potential for task loading, exertion, narcosis, stress, and in my case poor memory and math skills, I enjoy having that sanity check. remembering that we are talking about rec divers accidentally going into some limited deco relying on math formulas done in the head is a poor option IMO. Such skills are only as good as the rate that they are practiced to be retained and I just don't see the average rec diver doing that.

I am not negative about computers even if I don't use them.

What I AM negative about is people using them without knowing what the hey these things are telling them. I 've witnessed panic in divers because their computer told them they were in deco. Any decently OW diver SHOULD know what that means. If not, they are poorly trained.
I am not saying they should be deco experts... Just that they should know enough to realize what those numbers means. Only then will computers be worth more than expensive blingbling...

 

[DiveNav]

.......What I AM negative about is people using them without knowing what the hey these things are telling them. I 've witnessed panic in divers because their computer told them they were in deco. Any decently OW diver SHOULD know what that means. If not, they are poorly trained.
.......

I am with you on this one. That is why we have developed online tutorials and Apps for model-specific dive computers.

More education would be better, but there are so many models out there.

While some agencies have incorporate dive computers in their OW curriculum, they only cover them generically and only in very few cases they offer training for model-specific dive computers (specialties).

Alberto (aka eDiver)

 

[DevonDiver]

Closing a manifold is ONLY done to isolate a tank that has an unfixable problem. At ALL other times it should be open (unless for valve drill practise). There is absolutely no (imho valid) reason to do otherwise.

I won't argue with you on that point, because I share it. However, it's important to note that there's more than one perspective on configurations and protocols - and that includes the use of the isolation.

Opinions are opinions. There is never "ONLY" one way to do things.... merely pros and cons... and the requirements and preferences of an individual.

 

[cascas]

..... double post...

---------- Post Merged at 04:34 PM ---------- Previous Post was at 04:30 PM ----------

I won't argue with you on that point, because I share it. However, it's important to note that there's more than one perspective on configurations and protocols - and that includes the use of the isolation.

Opinions are opinions. There is never "ONLY" one way to do things.... merely pros and cons... and the requirements and preferences of an individual.

Hence the imho disclaimer

 

[freeclimbmtb]

My open water glass had rental gear with depth and pressure. Didnt even have a bottom timer come to think of it. The first time I saw a dive computer was when I rented gear for the first time and I said "Hey! Look at this thing!"

I thing with how much you pay for a computer, it should include a 10-20 minute 1 on 1 sit down with a KNOWLEDGEABLE rep that can explain how to use it...correctly.

 

[DevonDiver]

Hence the imho disclaimer

Disclaimer for the second part. For the first part ["Closing a manifold is ONLY done to isolate a tank that has an unfixable problem"], there are some very competent divers who prefer to keep the isolator closed, and feather it at intervals during the dive to balance their tanks. This has pros, and cons, as mentioned. It is a recognized technique though, even if not taught on mainstream courses..

 

[cascas]

Disclaimer for the second part. For the first part ["Closing a manifold is ONLY done to isolate a tank that has an unfixable problem"], there are some very competent divers who prefer to keep the isolator closed, and feather it at intervals during the dive to balance their tanks. This has pros, and cons, as mentioned. It is a recognized technique though, even if not taught on mainstream courses..

Be it as it may, I am GUE trained, these guys know what they are doing ( I'm NOT saying others do not) and I fully stand behind what they teach.

So in MY world... the manifold stays open because in my world there is no valid reason to close it...

But... to each its own...

 

[mathauck0814]

Be it as it may, I am GUE trained, these guys know what they are doing ( I'm NOT saying others do not) and I fully stand behind what they teach.

So in MY world... the manifold stays open because in my world there is no valid reason to close it...

But... to each its own...

I agree - the manifold should never be isolated unless there is an issue. I was merely pointing out to the OP that back mounted doubles would be a better solution than a pony unless it introduces a logistical issue (e.g., rocky shore entries).

 

[cascas]

I agree - the manifold should never be isolated unless there is an issue. I was merely pointing out to the OP that back mounted doubles would be a better solution than a pony unless it introduces a logistical issue (e.g., rocky shore entries).

Personally I do not believe in ponies just because I think proper gas management beat it hands down. The hassle of understanding gas management is sooo much less then the hassle of lugging a pony around, hving it tied to your kit, making sure it is filled etc... and for what ? those few breaths they will give you ? To me it's just not worth it...

Of course i am not talking about deco or bottom stages 40 cft and up....that's waaay different....