If the technology you allege to exists really does exist, then the MH370 probably would have been found by now.
Keep in mind that the spooks are loathe to reveal their best technology so would never reveal it for something like finding the MH370.
Keep in mind that the spooks are loathe to reveal their best technology so would never reveal it for something like finding the MH370.
And that's roughly the difficulty of finding a submarine. If anyone is seriously thinking that they can find all of an advanced nation's submarines and disabling them in a first-strike style attack... well... yeah. Its just not feasible with current technology.