Two military planes from China have arrived in Perth, and the AMSA said they would join the search on Monday. They join Australian, New Zealand and U.S. aircraft. Japanese planes are also expected soon.
Erik van Sebille, an oceanographer at the University of New South Wales in Sydney, said the currents in the area typically move at about one meter (yard) per second but can sometimes move faster.
Based on the typical speed, a current could theoretically move a floating object about 173 kilometers (107 miles) in two days.
But even if both satellites detected the same object, it may be unrelated to the plane. One possibility is that it could have fallen off a cargo vessel.
Because the search area is a four-hour flight from land, some of the planes can search for about only two hours before they must fly back. Others may be able to stay for up to five hours before heading back to the base.
The area where the objects were first identified by the Australian authorities is marked by strong currents and rough seas, and the ocean depth varies between 1,150 meters (3,770 feet) and 7,000 meters (23,000 feet). In addition, Hishammuddin said a low-level warning had been declared for Tropical Cyclone Gillian, although that was north of Australia and closer to Indonesia.
Malaysian authorities have not ruled out any possible explanation for what happened to the jet, but have said the evidence so far suggests it was deliberately turned back across Malaysia to the Strait of Malacca, with its communications systems disabled. They are unsure what happened next.
Police are considering the possibilities of hijacking, sabotage, terrorism or issues related to the mental health of the pilots or anyone else on board.
Malaysia has also asked the U.S. for undersea surveillance equipment to help in the search.
Griffith reported from Perth, Australia. Associated Press writers Todd Pitman and Eileen Ng in Kuala Lumpur, Malaysia, Kristen Gelineau in Sydney and Didi Tang in Beijing contributed to this report.
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