triox vs. trimix?

[Brian of Aquanauts]

Originally Posted by Mark Powell

Nope, for TDI Trimix you need at least 100 dives, no specification on depth but you must have Adv Nitrox and Deco (or combine the courses).

For TDI Advanced Trimix you do need at least 25 dives deeper then 30m.

You are exactly right, my apologies, I was looking at the standards for Adv Trimix instead of Trimix, and was quite impressed when i saw the 25 dive experience requirement between courses, same as we use in GUE, so didn't think to check further. Section 8.9 does indeed state 1.5 x deco gas, i was pulling the details from section 6.9 3.A

If it is indeed possible to combine these courses, then the TDI looks more apealing than it did previously. Is there a combined Triox course available similar to the IANTD one? Can't find any reference to it in my manual.

[Steve S]

Originally Posted by divingniknaks

Yes, do Fundies !

Sorry, couldn't resist given some recent threads

Safe diving,
Steve

[Mark Powell]

Originally Posted by Brian of Aquanauts

If it is indeed possible to combine these courses, then the TDI looks more apealing than it did previously. Is there a combined Triox course available similar to the IANTD one? Can't find any reference to it in my manual.

There is no Triox course as such. TDI are of the view that if you are using Helium then you need all the skills of the Adv Nitrox, Deco and Trimix courses.

[IanDennis]

Originally Posted by Mark Powell

You DO NOT need to dive to 45m to get experience with Adv Nitrox and Deco before Trimix. The course standards clearly state that one of the qualifying dives needs to be deeper than 30m, but that can be 31 or 32m. Once qualified, If the diver really doesn't want to dive below 30m then they can then get experience in the 25m-30m range before going on to Trimix. If even a single 32m dive is more than they are willing to accept then they can combine Advance Nitrox, Deco Procedures and Trimix into a single course so that they never need to dive below 30m on anything other than Trimix. It's a long intensive course but is perfectly accetable under TDI standards (sort of sounds a bit like a Tech 1 course).One of the advantages of TDI is that it offers the flexibility to follow either path.

Mark- Obviously each course whether AN & DP or Triox has it own respective merits and qualities that will appeal to different divers. Most of the technical agencies can tailor a course as you describe- the timescales involved is usually the prohibitave factor however for the student.


Triox course standards take us to a maximum of 48m – as with any other course the student is given a foundation to build upon. Whilst they may experience diving to these depths under direct instructor supervision, the majority would then seek to build up their experience gradually prior to moving to the maximum limitations of the course.


Whilst there is greater skill involved in the use of Helium then by the time divers have completed the course they should be competant to complete such dives. As I have commented upon before Triox is an intermediate course and should not be considered equivalent to a Normoxic Trimix course.

Originally Posted by Mark Powell

There is no Triox course as such. TDI are of the view that if you are using Helium then you need all the skills of the Adv Nitrox, Deco and Trimix courses.

Guess we must agree to disagree there then

[nigelH]

Originally Posted by Rod Abbotson

On another point on the whole shallow diving with helium triox mixes - I eventually got around to reading last years BSAC Incident reoport - seems to be a few problems there with divers having buoyancy problems and not sticking to the deco schedule properly resulting in trips to the chamber where on air they would probably have been ok.

Admittedly if you miss stops Helium is not your friend.

Conversely at 60m without helium I probably wouldn't know what a deco plan was.

[milldog]

Originally Posted by Brian of Aquanauts

You are exactly right, my apologies, I was looking at the standards for Adv Trimix instead of Trimix, and was quite impressed when i saw the 25 dive experience requirement between courses, same as we use in GUE, so didn't think to check further. Section 8.9 does indeed state 1.5 x deco gas, i was pulling the details from section 6.9 3.A

If it is indeed possible to combine these courses, then the TDI looks more apealing than it did previously. Is there a combined Triox course available similar to the IANTD one? Can't find any reference to it in my manual.

Fukc me you didnt get it wrong did you!!

I guess the blinkers from the DIR course let you miss that one

Graham