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Old 12-16-10, 11:53 PM   #31
TLAM Strike
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Join Date: Apr 2002
Location: Rochester, New York
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Quote:
Originally Posted by Gargamel View Post
But I think the problem most of are having are the words, "finds and tracks"

I understand loud noises over great distances, or sound channels carrying intermittent sounds great distances. Detection is not the problem, tracking is. But isn't one of the problems with tracking through the deep sound channel the fact that range (Other than "It's really effing far way cap'n") is practically impossible to tell since it's actually based on some sort of harmonic? IE, the contact would be a possibility of ranges of multiples of say 30 miles, ie it could be at 60. 90, 120, or 150 miles, etc?
You are sort of confusing it with a Convergence Zone I think. Those occur every 30 miles while the Deep Sound Channel sucks in certain frequency tonals in for lack of a better word vortex a couple of hundred feet tall where sound waves refract back and forth very quickly across the axes of the channel.

Take a look at this:

at about -1 (thousand meters) is the DSC. The larger bounces are the convergence zones. if your sensor is above or below the axis then you could lose the contact as the sound waves bounce (you would be in their "Shadow Zone") but if its in the axis then the waves are bouncing along such a narrow corridor that you can't miss them.
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