PERTH, Australia (AP) — Aviation expert Geoffrey Thomas says if no pings from the black boxes are detected, finding the missing Malaysian airliner could require years and "an enormous international effort to actually survey the Indian Ocean floor."
Search teams racing against time and battery life to find the flight recorders crisscrossed another patch of the Indian Ocean today, four weeks after Flight 370 with 239 people aboard disappeared.
Planes, ships and two submersible sound locators are deployed in the increasingly urgent hunt.
The recorders could help investigators determine why Flight 370, which disappeared March 8 while en route from Kuala Lumpur to Beijing with 239 people aboard, veered so far off-course.
So far, there's been no sign of the Boeing 777.