Accelerated Deco

[Bardo]

Originally Posted by Druid

IANTD Advanced Nitrox (Tech Lite) uses up to 50% nitrox for accelerated deco, not 100%. It's what my card says anyway.

As someone else said, it's changed - it's now 100% max for deco. To be honest, though, IANTD are actively steering students towards their Advanced Recreational Trimix course which offers all the learning benefits of the Advanced Nitrox course but with the added safely/advantages of helium-based recreational mixes to a maximum depth of 48m.

if anyone is interested, IANTD Instructor Trainer Phil Short is teaching an Advanced Recreational Trimix course at Vobster starting on the 2nd Feb...

IANTD Advanced Recreational Trimix - 2nd Feb

[Druid]

Originally Posted by Bardo

As someone else said, it's changed - it's now 100% max for deco.

I only did my course here in Egypt at the end of October, so I thought my experience would be up to date. Maybe we're more than a couple of hours behind the UK

Originally Posted by Bardo

To be honest, though, IANTD are actively steering students towards their Advanced Recreational Trimix course which offers all the learning benefits of the Advanced Nitrox course but with the added safely/advantages of helium-based recreational mixes to a maximum depth of 48m.

With He at about 5p/ltr, they're steering students away from the Rec Trimix course here, just for reasons of cost. TBH in clear blue water I don't feel particularly narced at 40-45m so it kind of makes sense. I don't know how I'd feel at those depths in the North Sea though!

[MidnightCowboy]

Bardo, would you recommend the IANTD rec trimix over the Adv nitrox & deco procedures course ?

I'm trying to make my mind up between the two at the moment, correct me if i'm wrong (which I probably am) but the only difference I can find is the rec trimix course gives you 2 trimx mixes to use in addition, the deco allowances & skills seem to be the same ???

[David Parker]

Originally Posted by Druid

IANTD Advanced Nitrox (Tech Lite) uses up to 50% nitrox for accelerated deco, not 100%. It's what my card says anyway.

Did mine in november with the dive school at stony in November, Definatly allows you to buy 100% IANTD realeased new cards. I bought O2 today with mine for my home build. I personaly found the course excellent. Speaking to a mate of mine who did the 2 TDI courses & showing him the manual it he said it covers basicaly the same areas. Personaly my conclusion was that IANTD is better value for money covers basicaly the same areas, so it is down to the Instructor you get. If you get the right one you wont be disapointed & save over £300.

Hope this helps.

Dave

[Bardo]

Originally Posted by MidnightCowboy

Bardo, would you recommend the IANTD rec trimix over the Adv nitrox & deco procedures course ?

I'm trying to make my mind up between the two at the moment, correct me if i'm wrong (which I probably am) but the only difference I can find is the rec trimix course gives you 2 trimx mixes to use in addition, the deco allowances & skills seem to be the same ???

As you've already discovered, there's a lot of similarities between the courses that the two agencies have to offer. In truth, both the IANTD and TDI courses will teach you the same core skills - valve shutdowns, gas switches, gas sharing and so on - and much of the same theory, all of which comes together to achieve the same end - that is, to produce a 'sorted' diver that can safely and proficiently dive within the limits of the course certification.

If you want to be really picky, the only real difference between the two options is a) the IANTD course gives you access to two helium-based mixes (tx28/25 and tx32/15) which makes *alot* of sense in UK waters and b) the TDI Decompression Procedures certifies you for *unlimited* deco rather than the 15 minutes imposed by the IANTD ticket. I guess it's all swings and roundabouts! Personally I wouldn't be too put off by the 15 minute limit - at this stage in your diving, 15 minutes is plenty enough! By the time you're ready to do more, you'll probably be looking to 'upgrade' to normoxic trimix anyway!

Ultimately which course is best for you comes down to a simple deciding factor - the instructor that's teaching it. Fact is, any training programme is only as good as the instructor that delivers it - get this bit right and the rest will follow. Speaking from personal experience, Phil Short is an exceptional instructor who's depth and breadth of knowledge and experience have few equals here in the UK. Likewise, Mark Powell has an extremely good reputation that many on YD will attest to. Either way whichever instructor you choose, you'll get one hell of a course!

[big_si]

Originally Posted by David Parker

...so it is down to the Instructor you get.

This is the key bit, I think. Some instructors will take you through what's in the manual and tick the boxes, others will give you a lot more than that.

Originally Posted by David Parker

If you get the right one you wont be disapointed & save over £300.

Save £300?!?!? :OMG: My Adv Nit and Deco Procs cost about £350 so you must have got a real bargain!

[David Parker]

Originally Posted by big_si

Save £300?!?!? :OMG: My Adv Nit and Deco Procs cost about £350 so you must have got a real bargain!

Yeah alright only £75 more expensive than the IANTD one. £350 is prity competitive thou and I make you right if you get someone who gives you more than just ticked box's that £75 is well spent. The chap who run my course did just that, he not only ticked the box's but taylored the dive planing section to suit my style of diving on my box of death. I was fortunate I got someone who gave me more and saved a few pennies on the way.

Dave

[Janos]

I would (and have) phoned up an instructor, and said "teach me what you can in five days." I didn't know whether I would end up with a 45m ticket or a 60m ticket at the end. I was happy to let the instructor judge my diving and give me the appropriate ticket.

Can you do something similar?

Janos

[Bardo]

Originally Posted by Janos

I would (and have) phoned up an instructor, and said "teach me what you can in five days." I didn't know whether I would end up with a 45m ticket or a 60m ticket at the end. I was happy to let the instructor judge my diving and give me the appropriate ticket.

Can you do something similar?

Hehe. Last time I did that, I walked away with a Bubblemaker card!

[Luis Filipe]

Hi,

as far as I know, the TDI Deco Procedures doesn't give you acelerated deco... You must do the calculation of the Deco with the same backgas, even if you have a richer mix in the Deco (have to consider the PPO2). The deco bottle is used as a bailout with a max PPO2 of 2.0 for bailout purposes, and 1.6 for max PPO2 for Deco. Normally the course is done only with a mono and a deco botlle.
For acelerated deco, you need at least TDI Extended Range or TDI Entry Trimix. With that you can do the deco calculation using the real deco mix.

Hope it helped.

Reds