Question CCR for recreational depths

[Wibble]

A wing is still basically the same even after you slighty change the design. And claiming low volume masks and dry gloves haven't been around for decades is just nonsense.

Yeah, combining something closed with something not closed makes lot of sense... in Wibble world.

For someone who does make some valid points, you can really upset people with this belligerent attitude.

 

[L13]

A wing is still basically the same even after you slighty change the design. And claiming low volume masks and dry gloves haven't been around for decades is just nonsense.

Yeah, combining something closed with something not closed makes lot of sense... in Wibble world.

For someone who does make some valid points, you can really upset people with this attitude.

Don't you know that things that have been around for a while aren't improvements over things that preceded them? And if it's been a while, obviously there are no possible further improvements!

 

[kimh]

…everyone knows that rebreathers haven't changed in years, and never will.

Think about it: an independent, non-professional, civilian diver doing 330'/100m+ rebreather dives on trimix, to do photographic surveys of a wreck that he and his friends discovered themselves. As a hobby. We have people like that on Scubaboard.

Now, get in your time machine & go back to 1985 – describe that scenario to a 1985 rec diver. They'll probably start babbling about "flying pigs."

 

[Wibble]

Hmmm. Can a J-valve fail? (Assuming anyone who uses one for recreational diving using tables knows "down" when filling, "up" when commencing a dive, periodically check for "up" while diving, pull "down" and ascend if detect breathing resistance.)

rx7diver

Sorry granddad, what's a J-valve?

 

[L13]

Hmmm. Can a J-valve fail? (Assuming anyone who uses one for recreational diving using tables knows "down" when filling, "up" when commencing a dive, periodically check for "up" while diving, pull "down" and ascend if detect breathing resistance.)

rx7diver

Not saying that the J-valve can't be dived safely, or that it doesn't have some advantages that some people still prefer. But there is a reason they are no longer on the market.

 

[James79]

Not saying that the J-valve can't be dived safely, or that it doesn't have some advantages that some people still prefer. But there is a reason they are no longer on the market.

San-O-Sub and Aqualung still make them (aqualung just for commercial and military). Granted they are sold for niche use cases, in those use cases they are just the thing.
As to how they can fail, primary "failure" mode is operator error (lever got pulled without them noticing... avoidable by regularly reaching back to check), but there are potential failure modes that all come back to maintenance.

Respectfully,

James

 

[Wibble]

Don't you know that things that have been around for a while aren't improvements over things that preceded them? And if it's been a while, obviously there are no possible further improvements!

Not you as well!

A wing is still basically the same even after you slighty change the design. And claiming low volume masks and dry gloves haven't been around for decades is just nonsense.

The Wright Brothers built a plane. It's basically the same as Concorde.

There's a massive difference in wing designs. Look at those massive horseshoe things with 98lbs of buoyancy and bungees that look like a dinghy when inflated. Masks too have changed with single faceplates and single moulding being more common.

But hey, I know I'm wrong. You lot are the material scientists...

 

[L13]

Not you as well!

I have been assimilated by the Borg...

I shall not question the leaders of the faithful...

etc.

 

[berndo]

Looks like all the people who never used a rebreather think they'll be mainstream for rec diving soon (well and wibble but he thinks dry glove are a new invention).

And the people that actually dive a ccr think they wont be mainstream for rec diving.

 

[berndo]

Think about it: an independent, non-professional, civilian diver doing 330'/100m+ rebreather dives on trimix, to do photographic surveys of a wreck that he and his friends discovered themselves. As a hobby. We have people like that on Scubaboard.

Now, get in your time machine & go back to 1985 – describe that scenario to a 1985 rec diver. They'll probably start babbling about "flying pigs."

You mean like the independant, non-professional, civil divers like Oliver Isler who were pushing deep cave in even in the 80s on rebreathers?

Here is just one out of many articles with stuff from the real world you've never heard about:

http://www.advanceddivermagazine.com/ADMEZINE/VictoryatLast.pdf