I would suggest to watch the video in the first post in this thread before you shell out for the VPM upgrade:
I agree with stuartv, the "upgrade" is a waste of money.
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I would suggest to watch the video in the first post in this thread before you shell out for the VPM upgrade:
Correct, which is equivalent to the o-ring holding the plug in if the port is unused, so this continues to be a moot point..... I don't know why folks continue to use a point of failure analogy......
It takes longer to describe & explain the process below than to actually do it -and to show that you really don't need the extravagance of wireless/hoseless AI. . .....So I do not need to consider other Shearwater models but PERDIX.
That leaves me w 2 options. I am considering pros and cons of AI model. It is nice to have gas metrics on the screen, however, it introduces one more element which can break, and - more important - an HP one. Also the electronics can break (though this situation is backed up by a good ol' SPG.) Also, monitoring my gas supply using SPG is already something quite automatic for me.
Let me know if I am overlooking some good reason why to buy AI? I do not want to start any feature nit-picking flamewar, I am just curious if there are some uses to this than what I can see.
Awesome commentIt takes longer to describe & explain the process below than to actually do it -and to show that you really don't need the extravagance of wireless/hoseless AI. . .
For example: I have a full 200bar AL80 tank and consume 30 bar in five minutes at 18 meters depth; therefore after five minutes I know have 170bar remaining (200 - 30 = 170 bar):
So five minutes elapsed time and my SPG should read 170bar -check the SPG! It does.
Another five minutes for total ten minutes elapsed time and my SPG should read 140bar -check! It does.
Fifteen minutes elapsed time and my SPG should read 110bar -check! It does.
Twenty minutes elapsed time and my SPG should read 80bar -check! It does, and then start a multi-level ascent to the shallows around 9 meters where I use 20 bar in five minutes. Finally ascend to complete a three minute safety stop, break the surface & inflate bcd, and I know before even looking that my SPG will show 35 to 40bar remaining.
And so begs the question: do you really need the expense of wireless AI to tell you what you already know about your consumption rate (or should be motivated to learn & figure out in the first place), over the practical & economic utility of a basic bottom timer/dive computer and SPG? Is it really so hard to perform the subtraction arithmetic above -both on pre-dive planning & real-time during the dive- without an AI feature?
[Especially for all Metric System users with typical nominal pressure Sac rate values of one to two bar per minute, you don't need the Air Time Remaining functions of an AI feature: In other words, how difficult is it to do in your head multiples of 1 bar/min or even 2 bar/min??]
You killed the discussion nuff saidAwesome comment
I really should know but where do you get that info?My AI transmitter is over 2 years old and the battery still registers as "Good" on my computer.
It tells you if it’s low. So I guess if it’s not low, it’s good?I really should know but where do you get that info?
I mean where on the computer is the info on transmitter battery condition?It tells you if it’s low. So I guess if it’s not low, it’s good?