Not to gainsay what is an excellent thread, but wasn't this sort of thing not practical in WW2 U-boats? I've read elsewhere that the hydrophones were good enough for getting the general bearing of contacts, but not precise enough to use this [very clever] technique. In other words, are we using a post-war technique by using this method?
Please don't take my comments as being derisory of this method. I salute anybody who is clever enough to do this sort of thing; I just don't wish to employ ahistorical methods as I simulate being a WW2 U-boat Kaleun.
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