I don't want to be the one comming accross the the ***** here but I sure hope this is a joke, everything in here has the stench of a trust me dive for starters.
Question, what is a "tec air fill" ?
I don't see anything in here that indicates extra care to ensure a safety net, if you are stating you would take care of both of you, not only is this a trust me dive, this was not a team dive, if you had a catastrophic failure would the AL80 and the 19Cft got you BOTH back to the surface safely with stops? Did you pad "your computer readouts" to account for temperature and exposure protection? you do know that being cold effects offgassing right?
How exactly would 19 cft pony have done you any good at 166 feet of depth? Did you do the math, is 19 cft enough to get a diver through deco and safely to the surface with proper safety factor? What would have happened in a buddy seperation? Now if you say oh I'm a good enough buddy that won't happen, thats one factor that you didn't count into your "safety net" that can and does happen espeically in low visibility lakes, if the $h1t hits the fan you better be able to take care of the situation yourself when your pulling a dive off in those conditions, the "reserve" being a little pony carried around by your buddy is not a safety net.
Do you consider a single AL80 with a buddy carrying a 19 Cft pony for "reserve" to be a safe practice when diving deep air?
Alan did you ignore your training when you did this dive? I would assume a properly trained "trimix tec diver" would know better than pulling a stunt like this.
Was everyone diving two computers? Was anyone carrying a precut backup deco schedule just in case? Did you actually sit down and calculate gas volumes for the dive? (answer to that is no, or if you planned it to come back at 150 then you might as well play russian roulette on your SIT).
Was there any oxygen anywhere in case of an emergency? If not what would you have done in the event of someone showing symptoms of DCS after the dive? What if you woudl have gotten tangled on the bottom and spent an extra 10 minutes at 166 feet to get free before surfacing, go ahead and run the numbers and see what an additional 10 minutes at 166 on air does to your deco schedule, did you put in proper gas reservers to account for said ermergencies?
Guys "tec" diving is about using the proper tools and procedures to pull a dive off and minimize the risks to dive again another day, anyone can buy an H, a "wreck light" and a pony and hit the water and go to depth, only proper gear and planning will minimize risk.
Now I know what your thinking here is that know it all jerk mouthing off again, if you feel that way so be it but if you drop the ego and really think about what I've put up here maybe you'll think twice before just jumping into a dive like that again, if I didn't care I'd just read the posts sit back and go "idiots" but I've met you guys, I don't want to pick up the paper one day and read about a body recovery.
If you want to dive deep air, go for it, but minimize the risk, proper gear and propper planning guys.
Alan who was your instructor for Trimix? I'm curious if he just didn't teach you or you just ignored the training.
You can ignore me or fire back or whatever, or you can do what I would prefer and why I posted and go wow man I never thought about that, or that, or your right about this, ah, now I realize what I just did, thanks for the post.
Or I can be the TSD ***** I really don't care, but at least I tried, but i post this with no anger, only concern for my fellow diver, dive safe guys, please.
