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Old 01-03-09, 03:05 AM   #11
zinosumatra
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Join Date: May 2008
Location: Indy, IN
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You want to be assured to get the noisy parts of the boat (the hull) beneath the sonic layer, yet close enough to the layer to gain maximum benefit from refraction. Pull the conning tower plus 5 meters beneath that depth and you should be solid.
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