A debris field containing 122 objects has been spotted by a French satellite scanning the Indian Ocean and a top Malaysian official on Wednesday called it "the most credible lead that we have" in finding Malaysian Airlines Flight 370.
Defense Minister Hishammuddin Hussein said the objects were more than 1,550 miles southwest of Australia, in the area where a desperate, multinational hunt has been going on since other satellites detected possible jet debris.
Clouds obscured the latest satellite images, but dozens of objects could be seen in the gaps, ranging in length from one yard to 25 yards. Hishammuddin said some of them "appeared to be bright, possibly indicating solid materials."
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The images were taken Sunday and relayed by French-based Airbus Defence and Space, a division of Europe's Airbus Group; its businesses include the operation of satellites and satellite communications, according to The Associated Press
Various floating objects have been spotted by planes and satellites over the last week, including on Wednesday, when the Australian Maritime Safety Authority sent a tweet saying three more objects were seen. The authority said two objects seen from a civil aircraft appeared to be rope, and that a New Zealand military plane spotted a blue object.
None of the objects were seen on a second pass, a frustration that has been repeated several times in the hunt for Malaysian Airlines Flight 370, missing since March 8 with 239 people aboard. It remains uncertain whether any of the objects came from the plane; they could have come from a cargo ship or something else.
"If it is confirmed to be MH370, at least we can then we can move on to the next phase of deep sea surveillance search," Hishammuddin said.
The search resumed Wednesday after fierce winds and high waves forced crews to take a break Tuesday. A total of 12 planes and five ships from the United States, China, Japan, South Korea, Australia and New Zealand were participating in the search, hoping to find even a single piece of the jet that could offer tangible evidence of a crash and provide clues to find the rest of the wreckage.
Malaysia announced Monday that a mathematical analysis of the final known satellite signals from the plane showed that it had crashed in the sea, killing everyone on board.
The new data greatly reduced the search zone, but it remains huge - an area estimated at 1.6 million square kilometers (622,000 square miles), about the size of Alaska.
"We're throwing everything we have at this search," Australian Prime Minister Tony Abbott told Nine Network television on Wednesday.
"This is about the most inaccessible spot imaginable. It's thousands of kilometers from anywhere," he later told Seven Network television. He vowed that "we will do what we can to solve this riddle."
In Beijing, some families held out a glimmer of hope their loved ones might somehow have survived. About two-thirds of the missing were Chinese, and their relatives have lashed out at Malaysia for essentially declaring their family members dead without any physical evidence of the plane's remains. Many also believe Malaysia has not been transparent or swift in communicating information with them about the status of the search.
Wang Chunjiang, whose brother was on the plane, said he felt "very conflicted."
"We want to know the truth, but we are afraid the debris of the plane should be found," he said while waiting at a hotel near the Beijing airport for a meeting with Malaysian officials. "If they find debris, then our last hope would be dashed. We will not have even the slightest hope."
China dispatched a special envoy to Kuala Lumpur, Vice Foreign Minister Zhang Yesui, who met Malaysian Prime Minister Najib Razak and other top officials Wednesday, the official Xinhua News Agency reported.
China, which now has Chinese warships and an icebreaker in the search zone, has been intent on supporting the interests of the Chinese relatives of passengers, backing their demands for detailed information on how Malaysia concluded the jet went down in the southern Indian Ocean.
That also is the likely reason why Chinese authorities - normally extremely wary of any spontaneous demonstrations that could undermine social stability - permitted a rare protest Tuesday outside the Malaysian embassy in Beijing, during which relatives chanted slogans, threw water bottles and briefly tussled with police who kept them separated from a swarm of journalists.
The plane's bizarre disappearance shortly after it took off from Kuala Lumpur en route to Beijing has proven to be one of the biggest mysteries in aviation.
Investigators have ruled out nothing so far - including mechanical or electrical failure, hijacking, sabotage, terrorism or issues related to the mental health of the pilots or someone else on board.
The search for the wreckage and the plane's flight data and cockpit voice recorders will be a major challenge. It took two years to find the black box from an Air France jet that went down in the Atlantic Ocean on a flight from Rio de Janeiro to Paris in 2009, and searchers knew within days where the crash site was.
There is a race against the clock to find Flight 370's black boxes, whose battery-powered "pinger" could stop sending signals within two weeks. The batteries are designed to last at least a month.
On Wednesday, the Australian Maritime Safety Authority, which is coordinating the southern search operation on Malaysia's behalf, said a U.S. Towed Pinger Locator arrived in Perth along with Bluefin-21 underwater drone. The equipment will be fitted to the Australian naval ship, the Ocean Shield, but AMSA could not say when they would be deployed.
Various pieces of floating objects have been spotted by planes and satellite, but none have been retrieved or identified. Wednesday's search focused on an 80,000 square kilometer (31,000 square miles) swath of ocean about 2,000 kilometers (1,240 miles) southwest of Perth.
David Ferreira, an oceanographer at the University of Reading in Britain, said little is known about the detailed topography of the seabed in the general area where the plane is believed to have crashed.
"We know much more about the surface of the moon than we do about the ocean floor in that part of the Indian Ocean," Ferreira said.
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Kerry Sieh, the director of the Earth Observatory of Singapore, said the seafloor in the search area is relative flat, with dips and crevices similar to that the part of the Atlantic Ocean where the Air France wreckage was found.
He believes any large pieces of the plane would likely stay put once they have completely sunk. But recovering any part of the plane will be tough because of the sheer depth of the ocean - much of it between about 3,000-4,500 meters (10,000-15,000 feet) in the search area - and inhospitable conditions on the surface where intense winds and high swells are common.
Australia's Bureau of Meteorology warned that weather was expected to deteriorate again Thursday with a cold front passing through the search area that bring rain thunderstorms, low clouds and strong winds.
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