Accelerated Deco

[Mark Chase]

Originally Posted by Janos

My understanding is that neither is a pre-requistite to each other. Deco Procs on it's own allows you to do decompression on backgas, which could be air if you're not Nitrox trained.

Advanced Nitrox allows you put whatever you want in your tanks, but not do deco.

If you've done both courses then you can do accellerated deco.

Janos

???? Hows that then when my TDI advanced Nitrox card states clearley

Qualified to use Satndard or custom nitrox mixes including 100% oxygen as a primary and decompresion gas to a max depth of 45msw

I am not saying your wrong but it seems a daft qualification if you cant use it for deco. I was taught SMB deployment deco gas planning and holding deco stops as part of my Advanced Nitrox training course.

ATB

Mark Chase

[Mal Bridgeman]

Originally Posted by Mark Chase

???? Hows that then when my TDI advanced Nitrox card states clearley

Qualified to use Satndard or custom nitrox mixes including 100% oxygen as a primary and decompresion gas to a max depth of 45msw

I am not saying your wrong but it seems a daft qualification if you cant use it for deco. I was taught SMB deployment deco gas planning and holding deco stops as part of my Advanced Nitrox training course.

ATB

Mark Chase

Wasn't there a debate about htis a while ago .... ? I seem to recall there was a suggestion that Advanced Nitrox on it's own did not allow accelerated deco
I'll go see if I can find it.....

EDIT - Okay Here it is ..... near the end, Mark Powell got a clarification from TDI HQ
Mal

[Janos]

Originally Posted by Mark Chase

???? Hows that then when my TDI advanced Nitrox card states clearley

Qualified to use Satndard or custom nitrox mixes including 100% oxygen as a primary and decompresion gas to a max depth of 45msw

I am not saying your wrong but it seems a daft qualification if you cant use it for deco. I was taught SMB deployment deco gas planning and holding deco stops as part of my Advanced Nitrox training course.

To be fair, I'm on much more comfortable ground when it comes to BSAC courses. But the TDI standards say:

Originally Posted by TDI Standards

This course examines the use of EAN-21 through one hundred (100) percent oxygen for optimal mixes to a depth of forty (40) msw / one hundred thirty (130) fsw. The objective of this course is to train divers in the benefits, hazards and proper procedures for utilizing EAN-21 through one hundred (100) percent oxygen for dives not
requiring staged decompression. Decompression techniques may be combined with this course at the discretion of the instructor."

Janos

[Bardo]

Originally Posted by Janos

To be fair, I'm on much more comfortable ground when it comes to BSAC courses. But the TDI standards say:

You're right - it's still bit of a grey area, in my opinion. I suspect the best man to settle the argument once and for all would be Mark Powell...

[Mark Chase]

What a daft qualification.

IMHO the only reason to have nitrox past say 40% would be for accelerated deco so Advanced Nitrox and Deco procedures should be one course.

ATB

Mark

[Mal Bridgeman]

Originally Posted by Bardo

You're right - it's still bit of a grey area, in my opinion. I suspect the best man to settle the argument once and for all would be Mark Powell...

Check the thread I linked to above .... it's explained in there.
Mal

[Last Man Standing]

The whole issue is a bit clouded and IMHO the situation is a bit daft.

TDI Adv Nx allows you to use mixes up to 100% but not for accelerated deco. Quite why you want to pay out for a nice rich mix and then not be able to use it to accelerate your deco is a bit hard to work out. I suppose you can always say it adds a nice safety factor to your dive?

The Deco procedures teaches you to complete staged (accelerated) deco but doesn't allow you to go and buy stronger mixes on its own....????

Very confusing and a bit frustrating. I was faced with paying out to do an adv nx course, which was bascially repeating my existing Nx cert. In the end I opted to go for the course which taught me how to use the stuff safely rather than the course which allowed me to buy it but not to be able to use it my advantage.

I guess its a clever marketing ploy by TDI to get you to pay out for both courses.

[Steve S]

Originally Posted by TonyDragon

Hi All
Thanks for all the replies, seems like the Advanced Nitrox and Deco Procedures combined is the way to go. Doesn't sound like I need to bother with Extended Range if all it adds is depth. I'm a BSAC Dive Leader so strictly speaking already qualified for 55m, though I agree with Mark (among others) that Trimix is the way to go if that sort of depth becomes a regular thing.
Though Mark, not all water over here is warm and blue , I'm in Victoria where conditions are far more like at home, cold, dark and drysuit temperatures. Got ot admit though, that's not the case at the moment, 20 degrees and 30m viz last weekend, hope it holds out until Saturday

Hi Tony,
Dive leader is to 50m as I understand it the BSAC extended extended range will cover you up to 100% for deco and the BSAC advanced nitrox is being updated to cover up to 50% for accelerated deco'

Safe diving,
Steve

[big_si]

Originally Posted by Bardo

Combine it with Fundies...

And potentially changing all of your kit...

Originally Posted by Bardo

and you're not gonna get a lot of change from £10000!

[Garf]

Originally Posted by Last Man Standing

The whole issue is a bit clouded and IMHO the situation is a bit daft.

TDI Adv Nx allows you to use mixes up to 100% but not for accelerated deco. Quite why you want to pay out for a nice rich mix and then not be able to use it to accelerate your deco is a bit hard to work out. I suppose you can always say it adds a nice safety factor to your dive?

The Deco procedures teaches you to complete staged (accelerated) deco but doesn't allow you to go and buy stronger mixes on its own....????

Very confusing and a bit frustrating. I was faced with paying out to do an adv nx course, which was bascially repeating my existing Nx cert. In the end I opted to go for the course which taught me how to use the stuff safely rather than the course which allowed me to buy it but not to be able to use it my advantage.

I guess its a clever marketing ploy by TDI to get you to pay out for both courses.

what he said, sort of

With TDI, the Adv EAN course allows you to use richer mixes - but as a safety factor rather than to accelerate deco. The decompression course is where this is taught. I guess you could be cynical about this, but the skills required to do staged decompression are taught on the deco course, so if you F**k up a gas switch when it's only a safety factor then you've just lost your safety factor rather as opposed to doing the same thing on accelerated decompression where it is then more critical to manage your gas switches.

the reality is that one set of skills is so closely linked to the other that most instructors team combined courses over three or four days.

G