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Originally Posted by greyrider
anyway to answer, it comes in handy when your being attacked by more than one dd. now, by sweeping a dd's soundcone, youll be able to tell which one is your biggest threat, the bigger the soundcone, the closer the range
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This works very well - I was able to tell that I was closing the gap on a distant merchant by counting the number of degrees in the cone and watching to see if they increased.
I still think there must be a way to get some guestimate of his course using the hydrophone, a stopwatch, and his approximate speed. But maybe not - it may require the range. I'll have to brush up on my side-angle-side geometry theorems.