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Message: <blockquote data-quote="Wolverine GTR" data-source="post: 16403559" data-attributes="member: 158020">Key moments emerge in tracking of missing Malaysia Airlines plane <img src="http://img843.imageshack.us/img843/6358/o5p8.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> ew details revealed Saturday by Malaysia's Prime Minister provide a  clearer chronology about what may have happened to Malaysia Airlines  Flight 370 between its takeoff and its last known spotting seven hours  later.Here's how experts  reconstructed key moments of the flight, according to CNN aviation and  airline correspondent Richard Quest. The flight disappeared more than a  week ago with 239 people aboard. Takeoff: 12:41 a.m. All tracking systems are  working as the Boeing 777-200ER takes off from the Malaysian capital of  Kuala Lumpur, headed to Beijing, on Saturday, March 8. ACARS sends communication: 1:07 a.m. About a half-hour after  takeoff, one of the plane's communication systems sends what turns out  to be its last communication, according to the CEO of Malaysia Airlines,  Ahmad Jauhari Yahya.The Aircraft  Communications Addressing and Reporting System is the onboard computer  that collects information -- a lot of it -- about the plane's and the  pilot's performance. It's akin to computers now in automobiles that  track oil levels and engine performance.Aboard aircraft, ACARS  computers measure thousands of data and send the information via  satellite to the airline, the engine manufacturer and other authorized  parties, Quest said. The information is useful for operations, maintenance, scheduling and performance purposes, Quest said."Your boss will know how you've flown the plane because ACARS will have told them," Quest said. Voice check-in: 1:19 a.m. Someone in the plane's  cockpit makes a voice check-in with air-traffic controllers as the  airliner was apparently leaving Malaysian airspace and entering  Vietnamese airspace."All right, good night" were the final words from the cockpit, said Zulazri Mohd Ahnuar, a Malaysian civil aviation officer. It's unclear who in the  cockpit spoke those words, but the phrase of "good night" is the radio  parlance used by pilots when executing a handover from one airspace to  another, Quest said."That is normal. That  happens a gazillion times," Quest said. " 'All right, good night' is a  pleasantry at the end of radio communication."It remains unclear,  however, whether Vietnamese air traffic controllers had any contact with  the plane during the handoff, Quest said. Transponder off: 1:21 a.m. A transponder sends  electronic messages from the airplane: "squawks" to radar systems about  the plane's flight number, altitude, speed and heading. This is enormously  useful information to air-traffic controllers who are looking at scores  of blips on their screen, and each blip is a plane emitting identifying  information, thanks to the transponder.The transponder,  apparently switched off, stropped responding at 1:21 a.m., said  Azharuddin Abdul Rahman, director of the Malaysian Department of Civil  Aviation. "Now the plane is flying  blind from the ground's point of view," Quest said. "If there is radar  there, the radar will see a blip, but they won't know who it is, where  they are going. They will just now know it's there." That's because the  transponder isn't sending identifying information about the plane.  Shutting off the transponder is a simple turn of a switch in the  cockpit, Quest said."The air-traffic  controller should notice. I suppose it would cause alarm. ... (The  information from) a plane that you're monitoring all of a sudden  disappears," Quest said. Civilian radar loses contact with plane: about 1:30 a.m. Air traffic controllers  in Subang, outside Kuala Lumpur, say they lost contact with the plane  over the Gulf of Thailand between Malaysia and Vietnam at coordinates 06  55 15 N and 103 34 43 E. Expected ACARS transmission doesn't happen: 1:37 a.m. The ACARS was supposed  to transmit a half-hour after it last did so.Therefore, it was supposed  to transmit at 1:37 a.m. -- but it didn't, Yahya said,So, the ACARS was shut down sometime between 1:07 and 1:37 a.m. It's a significant event: Turning off ACARS takes know-how, Quest said.If the flight were  hijacked or a target of terrorism, cutting off ACARS would be a  strategic move because the system reports to satellites anything being  done to the aircraft, Quest said. Military radar detection: 2:40 a.m. Though the Malaysian  plane is not transmitting information -- by ACARS or transponder --  radar on the ground or elsewhere can still detect a plane in the air. According to a Malaysian  Air Force official, military radar tracked the plane as it passed over  the small island of Pulau Perak in the Strait of Malacca. At this point, the plane was now hundreds of miles off-course. In fact, it was on the other side of the Malaysian Peninsula. Military radar showed  that the jetliner flew in a westerly direction back over the Malaysian  peninsula, Najib said. It is then believed to have either turned  northwest toward the Bay of Bengal or southwest elsewhere into the  Indian Ocean, he said.This was the last time any civilian or military radar tracked the aircraft.The focus now is searching for the missing flight in the southern Indian Ocean, according to a U.S. official. "The southern scenario seems more plausible," the official said.The Malaysian military  is now handing over its raw radar data to U.S. and UK officials,  apparently setting aside concerns about any sensitive military intelligence.Quest called this sharing of information a "huge" development in the case."They don't want anyone to know how good their radar is. They obviously decided that doesn't matter," he said. "We don't know much  about the Malaysian military, and that has been one of the issues,"  Quest added. "It appears that Malaysia was providing an interpretation  of the analysis -- and not the raw data. Now they are handing over the  raw data." Satellite 'handshakes': 8:11 a.m. Malaysian Prime Minister  Najib Raza revealed Saturday that a satellite tracked the plane at 8:11  a.m., more than seven hours after takeoff. Najib didn't provide  details on the satellite tracking, but it appears that orbiters high  above the ocean detected the plane as the satellite or satellites  attempted a series of "handshakes" -- or electronic connections -- with  the plane below, Quest said.It's likely that the  plane didn't complete the handshake because its communication systems  were disabled, Quest said. It's also possible that the airline doesn't  subscribe to that part of the satellite system, he said. Nevertheless, the  satellites would have been able to trace a plane flying below them and  would have extended an electronic message equivalent to a hailing:  "There's a plane: Hello, hello, hello? Do you have anything for us?"  Quest said. The Prime Minister said  the "raw satellite data" confirm that the plane was Malaysia Airlines  Flight 370. The U.S. National Transportation Safety Board and the  Federal Aviation Administration, along with the UK's Air Accidents  Investigation Branch, concur, Najib said."Due to the type of  satellite data, we are unable to confirm the precise location of the  plane when it last made contact with the satellite," Najib said. Authorities believe the  plane was in one of two flight "corridors": a northern route stretching  to northern Thailand, Kazakhstan and Turkmenistan and a southern route  toward Indonesia and the southern Indian Ocean.More than a week after its takeoff, however, the whereabouts of the plane remain a mystery.</blockquote>

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