PERTH, Australia (AP) — Today could be the final day for planes and ships to conduct their surface search of part of the Indian Ocean for the missing Malaysia Airlines plane.

Thursday's mission will cover a 15,600 mile patch of sea about 1,400 northwest of Perth, Australia.

Meanwhile, data collected by a robotic submarine is being analyzed now that the sub has completed its first full 16-hour mission searching the ocean floor for wreckage from the plane and its two black boxes.