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Originally Posted by Pisces
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Apart from that you can get a slightly better resolution out of your hydrophone. If you listen to the sides where the sounds are barely audible, and average those, you get the bearing to the target. This works alot better than finding the maximum volume. If one of those sides is an even number and the other is an odd number the true bearing is somewhere close to xxx.5. Allways take that halve decimal when you can get it!!!
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Originally Posted by Robert Fulton
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The hydro station has a volume knob built-in aswell. 
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Pisces, you provide a treasure trove of valuable information. I had tried the averaging from the outer limits method, but only with modest success. My difficulty is picking up on the precise locations where I lose all contact. I had looked for a volume knob at the hydro station, but did not find it. I am now eager to do so. Is it there in the stock version? (I am away from home for a while, and cannot recheck for myself.)