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We like to call that a trimix cert... Would you argue that an open water student should go venturing into a cave without cave training? Blackwood, I sympathize with your situation. For you the Monster you call Narcosis is a big scary beast... Perhaps you might consider the fact that...

130 is the END we normally plan to in Trimix Diving. Blackwood - SERIOUSLY - this point has become moot by the verification that DSAT allows trimix on final cert dives (given Instructor pre-reqs are satisfied). For the sake of all that is holy and shiny in this world - let it die!

Tec40 Training through the DSAT course. That is specifically what it was set up for. You raised a point about the LDS not having a local Tec Instructor. We are not that common, depending upon where you are. Some shops have relationships with Tec Instructors and some do not. If you are...

I am an Aerospace Engineer too and I say Blackwood's analogy is silly - let it go..... :rofl3:

Hmmm - don't think so..... AndyNZ beat me to the post - The new DSAT Tec50 manual page 6-62 states that trimix can be used on the 165 foot dive 4...........

Wow - you're really stuck on that analogy aren't you? Well Rainer, it sounds like you have an extreme problem with narcosis so - yeah - go for the helium at 130. If it is available, I would prefer it too but I dove the SF Maru on air and remember every wonderful minute of it. What's that...

I don't think anyone claimed they are at the forefront (except DSAT themselves) - not even me. I agree with your opinion and it reinforces even more - instructor instructor instructor....

So what would you do if you went to Truk or somewhere that they really don't have helium? Sit on the boat and be deck fluff? I CERTAINLY agree that helium has its place but, just like nitrox, you learn to dive without it before you learn to dive with it.....

Wow - so you would want to go on a dive trip in a 3rd world (say Busuanga or Saipan) where helium is not available, do some technical diving and all the time be with someone who has never experienced narcosis? I guess you are more 'adventurous' than me. I see where you are going with your...

So you are promoting moving into trimix diving right off the bat? Part of learning technical diving is learning to deal with narcosis. I think it is quite a stretch do try to criticize an agency for teaching on air/nitrox for diving to 165.

Okay I have been reading all of the posts and will jump in here. I am a DSAT Tec and Trimix instructor (and I stayed at a Holiday Inn Express last night!). First off - DSAT just changed their courses and there are now 3 sub courses in the tec program (Tec40, Tec45 and Tec50). There are...

Actually there are requirements in later dives for neutral buoyancy S-Drills.

I would stay at 100 to catch up and pad the last stop by 50%..... Just to be safe.

I would stay at 100 to catch up and pad the last stop by 50%..... Just to be safe.

Agreed - I use a 6cuft bottle on my left side. It has worked for me on 200+ foot dives with plenty of reserve left.

What a great place! Throw in the wrecks in Subic or Coron and a "Surface Interval" in Angelese City and I believe we have the makings of an awesome dive trip! :)

Whatever floats your boat - who am I to call you foolish. :)

This is a very good practice in rough seas.