Should Shearwater add Air Integration to its computers?
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I want Shearwater to come up with a snorkel holder for the Petrel
Most of us on SB don't use a snorkel, are you sure that is what your want? It is another failure point, cuts down on your streamlining, looks really uncool, is unnecessary........
---------- Post added January 12th, 2016 at 03:23 PM ----------
I'll get you started...when you fin harder, your RMV goes up...when you are cold, your RMV goes up...when I read your posts....my RMV goes up
When I read some of the pompous, arrogant, condescending posts from the tech folks, it just makes me wonder, what the hell happened to them to make them so inflexible and angry.
Okay. Here's one for you all.
In a simplistic manner
The DC was an improvement on tables correct? It took into considerations your actual depth (s) rather than just taking your max depth and using a square profile.
Surely AI can further that by taking into consideration your actual gas consumption in real time so allowing refinement of the algorithms further?
Or not.
Discuss
In a simplistic manner
The DC was an improvement on tables correct? It took into considerations your actual depth (s) rather than just taking your max depth and using a square profile.
Surely AI can further that by taking into consideration your actual gas consumption in real time so allowing refinement of the algorithms further?
Or not.
Discuss
If they will make a black one and do it in collaboration with Halcyon's new Tech Snorkel, they can price it at $199 and sell truckloads.
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I'll get you started...when you fin harder, your RMV goes up...when you are cold, your RMV goes up...when I read your posts....my RMV goes up
Actually, cold is the major determinate of my SRMV, it is remarkably effort independent to a large degree. My advice, do not read stuartv's posts while you dive, a controllable factor in air consumption for you
---------- Post added January 12th, 2016 at 03:37 PM ----------
Quien es mas macho? I learned to dive in SoCal without a depth gauge or SPG, but I had a J valve. It worked out fine
The algorithm for decompression (and thus, computing no decompression limits) does not use your gas consumption as a parameter. So, having AI won't affect NDL or deco algorithms.
Computers that have AI do already use the consumption information to tell the diver their "air time remaining", which is just how long it will take to go from their current tank pressure to their configured reserve pressure (e.g. 500 psi) based on the rate the tank pressure has been dropping. And then they use that info to tell the diver "bottom time remaining", which is the lesser of NDL or "air time remaining".
The only way I foresee AI maturing much more on the "algorithm" front is if a tech computer has (or adds) AI and starts letting the diver configure their cylinder sizes into the computer along with the gas blends. Then the tech computer could predict dive time remaining based on consumption rate combined with its knowledge of the actual volume of each gas being carried. It could, for example, predict in advance that you will do a longer deco on 50% before you switch to 100% because it could calculate that you aren't carrying enough 100% to do the deco it would call for otherwise. And, thus, the computer could factor gas carried and consumption rate into its ascent plan and actually call for you to start ascending earlier than it otherwise would because it predicts that you will start eating into your designated reserve gas if you don't.
And, really, tech computers could do that without AI by letting the diver configure cylinder sizes, starting pressures, and their estimate RMV. AI would just let the computer measure some of those things and adjust its calculations in real time.
---------- Post added January 12th, 2016 at 03:41 PM ----------
Bummer you couldn't fit your balls through the tighter restrictions...
As I understand it, no. Another thing current algorithms don't do is count how much tissue (and of different kinds if you want to refine it further) you actually have on you. And I don't think you can meaningfully factor in one without the other.
Reku
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I would only buy it if the option of not choosing AI integration gave me a petrel 2 like the one that exists now.
In order to improve the algorithm (VBM for example)you would need internal sensors your body that provided the information (the size of the nitrogen bubbles, tissue density, etc) the algorithm uses to calculate. That is the only way to improve it.
VBM works by making sure that the bubbles do not grow too quickly. It does this by assuming a critical size that then is fed into the algorithm and based on time, depth, tissue density and gas being used then calculates what you need to do. If critical size and tissue density were measured on a per person basis (and not assumed) the algorithm could be improved by using sensors.
DevonDiver
N/A
Firstly, I've stated time and again that there is a drastic mindset shift when people progress to technical diving. That mindset is part of the formal education....and something you can fail a tech course for. It also exists for a reason. Technical dives will kill you if you mess up. In contrast, recreational diving is very forgiving and you'd have to almost try to kill yourself.
Does that mindset make us pompous or arrogant?... not in the slightest. The diving we do creates different priorities and principles, that's all.
Does explaining that mindset imply condescension?... not at all. But if a recreational diver hears our explanation for those principles and procedures....without understanding the nature of diving and risks that drive them... then they may incorrectly assume that these are 'attitudes' driven from ego, rather than a considered approach driven by necessity.
Inflexible? As I said, technical diving is unforgiving and punishes mistakes and accidents most severely. There is no 'getting away with it' like recreational divers enjoy when things go wrong. Flexibility is the preserve of those not placing their life in the hands of learned skills, protocols, procedures and principles. If a given principle or procedure is proven to reduce risk (of death), then you can't blame tech divers for not changing their approach on a whim, or for convenience.
Anger? I don't know where you get this from... but it probably says more about you, than anyone else. Anger doesn't come into it.
---------- Post added January 13th, 2016 at 10:11 AM ----------
VPM (Varying Permeability Model).
Shearwater, and others, use VPM-B... and the latest GF option, which also includes gradient factors.
https://www.globalunderwaterexplorers.org/varying-permeability-model-decompression-razor
https://en.wikipedia.org/wiki/Varying_Permeability_Model
VPM Algorithim
VPM-B model information
VPM For Dummies
http://www.rebreatherworld.com/showthread.php?38176-VPM-algorithm-explained-in-less-than-2000-words
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