Quote:
Originally Posted by GWN7
The US Navy used SOSUS (and later IUSS) to find the Thresher and K-129. You would figure that a 777 hitting the water in the middle of the night might make enough noise to be heard by them?
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SOSUS is mostly in the Atlantic and off the west coast of the continental USA in the Pacific. it was mostly designed to be an early warning/picket line for USSR missile subs. probably not much in the indian ocean
also, the software filtration on systems like these are designed to filter out sudden transient noises because it turns out the ocean is full of them. you better beleive that micro-earthquakes, oil exploration expositions etc etc are much louder, and transmit far better then a surface strike of an aircraft. also, noises on surface tend to be filtered out rapidly and do not transmit nearly as well as sounds produced very deep.