pro track audible alt.

[thad01 0]

I am relativly new to the sport, and just bought a Pro Track audible alt. I set the first alarm for 4,500. when the alarm went off, I was pretty sure I saw 5,100 on my wrist alt. I have it inside a full face Cookie helmet. Is it common for at least one of these to be inaccurate?

[DSE 5]

either device may be affected by being in a burble.

[jim_32766 0]

I have a ProTrack inside my H2 helmet and it sounds its alarm at roughly the same time I see the proper altitude on my wrist mounted Galaxy III. I wonder if you are experiencing pressure changes via your helmet causing the ProTrack to read lower.

Have you compared the under-canopy readings to see if they agree when the relative wind has decreased?

You could try both on your wrists and compare on the next jump. That would eliminate one variable.

The meaning of life . . . is to make life have meaning.

[phoenixlpr 0]

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I am relativly new to the sport, and just bought a Pro Track audible alt. I set the first alarm for 4,500. when the alarm went off, I was pretty sure I saw 5,100 on my wrist alt. I have it inside a full face Cookie helmet. Is it common for at least one of these to be inaccurate?

I have used ProTrack and Optima inside a fullface. I have not noticed that. Anyway you should not depend on that it might fail, it might die. Was it only one occasion?

[timmyfitz 0]

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You could try both on your wrists and compare on the next jump. That would eliminate one variable.

It may be difficult to hear the audible alarm if it is on your wrist.

[jim_32766 0]

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You could try both on your wrists and compare on the next jump. That would eliminate one variable.

It may be difficult to hear the audible alarm if it is on your wrist.

True. He would probably have to compare the data from the ProTrack to his memory of altimeter indication at time of deployment and under canopy. While this takes a little guess work on snivel time, it would at least eliminate the helmet pressure differential from the equation.

I wasn't suggesting he use the ProTrack on his wrist on a regular basis, just to work on finding an answer to the question he raised.

The meaning of life . . . is to make life have meaning.

[timmyfitz 0]

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You could try both on your wrists and compare on the next jump. That would eliminate one variable.

It may be difficult to hear the audible alarm if it is on your wrist.

True. He would probably have to compare the data from the ProTrack to his memory of altimeter indication at time of deployment and under canopy. While this takes a little guess work on snivel time, it would at least eliminate the helmet pressure differential from the equation.

Looking at the data from a Pro Track will not tell you when the audible alarm went off as compared to the other altimeter. You must HEAR the audible alarm to know when is sounds.

[Titanman2789 0]

I've found that mine is often right in the middle of the alarm as I'm passing through the altitude. So its set at 5000 ft, it starts maybe a couple hundred ft above that, and the beeping stops a couple hundred ft below it.

[jim_32766 0]

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Looking at the data from a Pro Track will not tell you when the audible alarm went off as compared to the other altimeter. You must HEAR the audible alarm to know when is sounds.

You have demonstrated an unfailing grasp of the obvious! Congratulations! Might be why the "guess work" was mentioned.

The meaning of life . . . is to make life have meaning.

[timmyfitz 0]

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Looking at the data from a Pro Track will not tell you when the audible alarm went off as compared to the other altimeter. You must HEAR the audible alarm to know when is sounds.

You have demonstrated an unfailing grasp of the obvious! Congratulations! Might be why the "guess work" was mentioned.

I'm sorry you don't get it.

[thad01 0]

Thanks for the input.. I have only made one jump with it so far, the winds picked up after the first jump, and stayed up for the rest of the weekend.. But it makes sense for the alarm to go off a few hundred feet before.. will make some more jumps with it this weekend, and update with the results..