The U.S. officials said the communication was four “pings” over a period of hours after the last ground contact with the plane, Malaysia Airlines Flight 370, which disappeared on its way from Kuala Lumpur to Beijing with 239 people on board.
citation for above quote
It seems you left this fact out of your theory!
Further to the point, it is based on this evidence that the US Navy has moved its assets west into the Indian Ocean.