WELCOME ABOARD!
I like your method. Unfortunately I have problems with calculations beyond 1+1, but your description is easily understood. Thanks for putting it up.
Quote:
Originally Posted by J.E. McKellar
Even then, a quick check with the periscope right before firing is necessary to get a precise fix.
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That's always the crux of the problem. You can't be precise with sound only. You always need to look.