As long as you can resist the temptation.
But I couldn't so I eventually did the full trimix course.
Good on you.
Formernuke, if your deepest dive is 30m, you have a ways to go but know that it is a slippery slope like Centrals aptly described.
My prediction of your experience is a reflection of my own. You may not find yourself on the same trajectory and others may have a different projection for you.
Once you start routinely managing your ABT deeper than 30m and you get your consumption (respiratory minute volume) under control, you’ll naturally want to stay longer and that will lead you to getting tec certified.
After a while in a multi-tank dive configuration, you’ll start flying your rig (bottom and deco gas) around on simple tec dives like it’s a glider plane. On a wall dive at 50m (+) with clear vis down to 70-90m and hammerheads cruising about, it will be hard to say, “I have no business further down there.” You’ll probably look at the 21% MOD limitation and want the ability to fly right past it on the next day of diving with a simple but important change in your bottom gas.
Since others around you on those dives will likely have the training to draw Helium, it will be hard to say, “No, mate...that course is not for me.” I’m sure there’s some similarity in the phenomenon of gateway drugs....you’ll be done with the ordinary stuff and want to move on to a more sensational experience.
Given that He safely chops down the 79% of nitrogen that complicates deeper diving, it will be hard to not give in to the safety rationalization of being able to plan for, draw and breathe Trimix. Then all of a sudden, your 60m dive turns into your dive buddies wanting you to go to 100m with them.
Like Bump-Head said, it’s a Teflon slope with a nice, even coat of WD-40. If you can be happy with 7-9 minutes of recreational ABT at 40m, I’d stay there and not step out onto the Teflon slope.
