Current opinions on Padi Tec-rec?

[stuartv]

TDI AN/DP has this same problem. 7.1g/l at 45m (150') on air (and slightly worse on Best Mix Nitrox).

Fortunately, with a qualified instructor, you can do AN/DP combined with Helitrox all in one course, with no extra dives required. With the helium allowed in TDI Helitrox, you can keep gas density under 6 g/l at the maximum depth (of 45m).

 

[RainPilot]

TDI AN/DP has this same problem. 7.1g/l at 45m (150') on air (and slightly worse on Best Mix Nitrox).

Fortunately, with a qualified instructor, you can do AN/DP combined with Helitrox all in one course, with no extra dives required. With the helium allowed in TDI Helitrox, you can keep gas density under 6 g/l at the maximum depth (of 45m).

RAID has trimix as an option on the Deep speciality and every tech course is a trimix course.

 

[Dan_P]

Yep, it’s problematic.
If you ask me, a “deep” course, rec or tech, to 40m or beyond on air, is bad practice and should be culpable by law on part of instructor and agency.

https://www.omao.noaa.gov/sites/def...rs and Scientific Diving Proceedings 2016.pdf

 

[stuartv]

Yep, it’s problematic.
If you ask me, a “deep” course, rec or tech, to 40m or beyond on air, is bad practice and should be culpable by law on part of instructor and agency.

https://www.omao.noaa.gov/sites/default/files/documents/Rebreathers and Scientific Diving Proceedings 2016.pdf

Is there a particular portion of that 277 page PDF that you are alluding to?

What statistics support the suggestion that diving deeper than 40m on air should be against the law?

Do those statistics show that 45m on air is more dangerous than, say, diving deeper than 100m on ANY gas? Or should diving deeper than 100m also be against the law?

 

[leadduck]

There is PADI TMX 45 and TMX 50.
You can do the deep dives of the Tec45 and Tec50 courses on Trimix, right?
Tech through PADI or TDI?

 

[stuartv]

There is PADI TMX 45 and TMX 50.
You can do the deep dives of the Tec45 and Tec50 courses on Trimix, right?
Tech through PADI or TDI?

The post you quoted seems to be pretty clear that TMX45 is something you can do AFTER you have completed Tec 45.

 

[leadduck]

The post you quoted seems to be pretty clear that TMX45 is something you can do AFTER you have completed Tec 45.

This post yes, but in practice you can either do TMX45 as an add-on to an existing Tec45 certification, or do Tec45 and Tec50 with TMX right from the start, e.g. Nitrox, Advanced Recreational Trimix, Normoxic & Trimix

 

[Dan_P]

Is there a particular portion of that 277 page PDF that you are alluding to?

What statistics support the suggestion that diving deeper than 40m on air should be against the law?

Do those statistics show that 45m on air is more dangerous than, say, diving deeper than 100m on ANY gas? Or should diving deeper than 100m also be against the law?

Consideration of gas density in diving planning, p. 72.

You're being facetious, surely

If you run a course to 100m equipping your students with a Spare Air and don't teach your students about gas (volume) management, ensuring they have ample gas for the dive, then yes, you should be culpable if they have an injury.
If you run a course to 40m on air and don't teach your students about gas density management and ensuring they have a proper gas for the dive, then yes, you should be culpable if they have an injury.

Let me be perfectly clear.
There is no controversy in stating that the maximal gas density one could sensibly plan for on a dive, particularly a course dive, is 6g/L, equating to well under 40m on air (about 35m if memory serves).
If planning insensible dives (for instance to 40m on air) with one's students and they get injured, yes, one may well be legally culpable. As one should be.

Trimix shouldn't be optional on deep (course) dives, but obligatory.

 

[Jiminy]

TDI AN/DP has this same problem. 7.1g/l at 45m (150') on air (and slightly worse on Best Mix Nitrox).

Fortunately, with a qualified instructor, you can do AN/DP combined with Helitrox all in one course, with no extra dives required. With the helium allowed in TDI Helitrox, you can keep gas density under 6 g/l at the maximum depth (of 45m).

At what depth can you no longer keep the gas density under 6 g/l ?

How much helium can you realistically add to the mix

 

[lexvil]

Is there a particular portion of that 277 page PDF that you are alluding to?

What statistics support the suggestion that diving deeper than 40m on air should be against the law?

Do those statistics show that 45m on air is more dangerous than, say, diving deeper than 100m on ANY gas? Or should diving deeper than 100m also be against the law?

I guess the 180+ feet (maybe it’s safer in feet rather than meters ) I did on air last summer makes me dead or a criminal?