[tet68]

Where is the debris? Without it this is still a theory.

[FAA]

There may have been debris two weeks ago but there may not be much left now.

[NVDave]

If the plane went into the ocean at a high velocity and a high impact angle, there might not be much debris on the surface.

[Star Traveler]

It’s a more precise theory which also serves to narrow the search field - which then increases the chances of finding something significant.

[Moonman62]

Where is the debris? Without it this is still a theory.

True, but the theory is looking better now. Doppler is a tried and true technique for locating radio beacons. Testing the theory with known flown routes is also a solid method.