Quote:
Originally Posted by the_tyrant
is there anyway to hide a sub as a school of fish or a whale?
maybe by playing sounds in the ocean? or by changing the shape of the sub?
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Not really, do this experiment: Talk to a friend in person then have them talk to you on the phone. Notice how they sound different each time. The speaker reproduces their sound but not exactly, it cuts off the bottom and top of the amplitude sine wave. Narrowband analysis can show this. But that is not to say that artificial noise can't mask a submarine's tonal by flooding the freqs around that with random noise.
Quote:
Originally Posted by Skybird
Anyone else having a problem with believing the claim that passive sonar type 2076 finds and tracks objects at ranges of 3000 miles...?
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Its
possible but
under very specific circumstances. In WWII detection of sounding charges were heard as far as 900 miles using the deep sound channel. Three SOSUS stations (Newfoundland was one) detected the implosion of the
Scorpion near the Azores, thousands of miles away.