mikeny9
Contributor
Sorry I haven't been able to reply to this thread, was busy not internet diving:
But the one that is computationally precise is not computationally accurate. If a digital SPG reads to the nearest 25 PSI but is off by 500 PSI to how much gas I actually have what difference does it make if it's computationally precise?
What was complex about that exactly? You're a software developer right?
I don't use a rebreather and have no interest in one, I don't see the need for one except below 300'. I imagine a lot of UTD people would think the same. Maybe the reason why there are so few UTD people with rebreathers is because within the already small community of UTD people, not many really care to go down that deep.
So in your opinion, the reason was the use of RD? What other evidence do you have that suggests it was purely RD? Were they depth adjusting like I mentioned above or did they just assume RD works for all altitudes like you did? It's easy to point the finger at RD, but from what I've seen it tracks 20/80 fairly close. There must be a lot of people getting bent on 20/80 then too. There are also a lot of people using RD and 20/80 with no problems but we never hear about those.
Weren't you booted from UTD for teaching students without having them complete their liability paperwork?
I'm 36, in the past two years I've taken a number of UTD classes and GUE/F. What would you like to know?
You'd round shallower, so 60'.
It's not taught directly as a part of RD, but it is taught that you shouldn't assume RD works for all altitudes. I've never had the chance or the interest to do any altitude diving, but personally I would look at some depth adjustment table or a computer like deco planner or multi deco to figure out what the depth adjustment should be, then just use RD according to the new depth. For example, if I normally dive to 100' at sea level for 30 min on nitrox 32 I would do the same dive only 30' shallower at 70' for 30 min at 10,000 ft above sea level. Why wouldn't that work?So how does Ratio Deco adjust for altitude now?
There is a difference between trusting facts like time and depth, and doing math in your head on the fly to come up with an ascent schedule, compared to trusting a device that is computationally precise, and does its computations using the same facts? Yeah. One has all the hard math done by a human. The other has all the hard math done by a computer and the human only has to apply their judgment to modify the results if and as conditions warrant.
But the one that is computationally precise is not computationally accurate. If a digital SPG reads to the nearest 25 PSI but is off by 500 PSI to how much gas I actually have what difference does it make if it's computationally precise?
I am also a software developer by day. If you think that it is a bug when a piece of software calculates an ascent schedule that is too long because it is set for a last stop of 20', all I can say is that I am glad we don't work together.
Yes, it's a common sense bug. Google Maps once plotted a course through a number of countries in Europe that amounted to 2 days of travel or something similar that was about 50 miles between the two points. It wasn't a bug in Google Maps: the border policy prevented Americans from traveling the direct route and an American would have to visit a variety of different countries in order to reach the intended point. Or, the person could use their head and just get a visa and take a 1 hour drive. I'm glad we don't work together either.
Well, at least there was no complex math to do in your head to get to that answer...
What was complex about that exactly? You're a software developer right?
He was quoting my comment about the rebreather program to be dangerous and implying that UTD has had zero RB accidents. Although that may be true UTD has actually only had a handful of RB divers certified and all the ones I know have returned to OC diving. I also know that UTD attempted to modify several rebreathers to suit their program needs only to have the manufacturers of those rebreather remove support for the agency.
I don't use a rebreather and have no interest in one, I don't see the need for one except below 300'. I imagine a lot of UTD people would think the same. Maybe the reason why there are so few UTD people with rebreathers is because within the already small community of UTD people, not many really care to go down that deep.
EDIT: I thought this was a reference to people being bent on Ratio Deco when I wrote this post as well.
Yes, UTD will tell you that there have been zero incidents using Ratio Deco. They were saying the same thing when i was arguing with Andrew about it.
I am trying to remember exactly, but when we talked our small Rocky Mountain UTD group had had six DCS cases, with two resolved by surface oxygen, two resolved by in-water recompression, one resolved after a number of days of chamber treatments after driving home to Colorado, and one resolved after a series of chamber treatments following a helicopter evacuation.
So in your opinion, the reason was the use of RD? What other evidence do you have that suggests it was purely RD? Were they depth adjusting like I mentioned above or did they just assume RD works for all altitudes like you did? It's easy to point the finger at RD, but from what I've seen it tracks 20/80 fairly close. There must be a lot of people getting bent on 20/80 then too. There are also a lot of people using RD and 20/80 with no problems but we never hear about those.
I decided to leave UTD (about 6 years ago) just prior to heading to Florida for a month...
Weren't you booted from UTD for teaching students without having them complete their liability paperwork?
Personally, I would love to read more from recent graduates. We have a bunch of old men bickering about this and that. It's been interesting, but I really want to hear from 20 and 30 somethings about what they were looking for when they took a UTD class and how it worked it out for them.
I'm 36, in the past two years I've taken a number of UTD classes and GUE/F. What would you like to know?
The above is what it used to look like before Ratio Deco 2.0 came about. I would assume the first stop would be at 66 feet instead of 75 for a dive to 100?
You'd round shallower, so 60'.
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