Trimix vs Helitrox

[KenGordon]

I agree it is not a bad thing, never said it was bad, just didn'd understand where it is like an isolated course since it is a trimix gas, some how you will cover it in the trimix course or not ?

It just allows the use of a little bit of helium for the dives between AN/DP and doing the real Trimix course. Here the addition cost is very small so it is an obvious choice. If a diver takes a while to get round to the next course then they have the advantage of a clearer head.

The helium specific part of these courses is not a lot of time, the real work is about dealing with the challenges of being deeper, stage handling, gas switching, coping with failures and the rest of it.

 

[Rich Keller]

I agree it is not a bad thing, never said it was bad, just didn'd understand where it is like an isolated course since it is a trimix gas, some how you will cover it in the trimix course or not ?

It is just a different blend and there is no reason why it cannot be covered in a trimix course. This is just another underwater basket weaving course.

 

[KenGordon]

It is just a different blend and there is no reason why it cannot be covered in a trimix course. This is just another underwater basket weaving course.

Except that is backwards. This is an optional part of a course done before normoxic trimix. Obviously anyone who does AN/DP and not the Helitrox version but goes on to a normoxic trimix can dive a 20% helium mix.

This isn't a standalone trimix 'lite' course, it is a deco course with extra mild trimix. Here it costs an extra £30 plus a fill. You can hardly pay for the willow for that money.

 

[Rich Keller]

extra mild trimix.

Is this a joke? It is extra mild but it is not trimix lite? Do you take a different nitrox course for every different nitrox blend you use? Do people actually believe this BS?

 

[Redshift]

Air is air and people do OW, AOW, etc... It's not just the breathing mix, it's all the needed skills, depth certification and equipment needs.

 

[KenGordon]

Is this a joke? It is extra mild but it is not trimix lite? Do you take a different nitrox course for every different nitrox blend you use? Do people actually believe this BS?

Maybe you need to read the course descriptions. On the one hand hand a course which teaches deco diving with some helium. On the other a course which teaches deeper trimix to people who have ALREADY learned deco diving.

One is a 45m single stage course, the other 60m two stages course. Of course a trimix diver could use 18/35 for the 45m dive rather than 25/20 but the mix is not the point, the depth and complexity is the thing. The progression is 45m then 60m. Helitrox at the 45m level simply gives a diver some more options to avoid being so narc'd.

 

[Rich Keller]

This still seems silly to me. You use different blends of nitrox for different reasons but you do not take a separate course for each use. This is just a cost saving measure to begin with, you do not NEED trimix until you get to 430ft.

 

[tomfcrist]

you do not NEED trimix until you get to 430ft.

You must be smoking crack.

 

[PfcAJ]

This still seems silly to me. You use different blends of nitrox for different reasons but you do not take a separate course for each use. This is just a cost saving measure to begin with, you do not NEED trimix until you get to 430ft.

Can you just stop?

 

[Rich Keller]

You must be smoking crack.

Trimix only real use is to reduce or eliminate the effects of HPNS in saturation divers. Read it for yourself genius. Military: US Navy Diving Manual (6th Edition) You use a higher percent of nitrogen then is needed only to reduce the cost of a fill vs heliox and you think it sounds impressive when you tell people you dive trimix.