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Malaysian Jet

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March 12th, 2014 at 6:49:59 PM permalink

beachbumbabs

Member since: Sep 3, 2013
Threads: 6
Posts: 1600

Quote: Fleastiff
AF447 wasn't missing until people in Orly Airport near Paris were getting ready for its arrival in about an hour.... and the plane had gone down shortly after leaving South America. I wonder how far its "tag box" coasted?

The only thing I would wonder about is that certain countries who are terrorist concerned or smuggling concerned seem to have very precise radar for ships and planes. If a yacht approaching to check in to customs has a local fishing boat go anywhere near it, the customs people often come out and follow it in under close escort thinking there may have been a drug transfer. The coverage is extensive and precise. This seems to include airspace though not civil aircraft routes. Malaysia is fairly rich, though corrupt, and smugglers are watched if they don't make proper payoffs. Also terrorist activity is feared though mainly in remote areas of Islamic fundamentalist domination. Australia requires 96 hours of prior notification of port of arrival for a pleasure yacht and complete listing of all persons aboard. Aruba is less strict but you can cook hamburgers in their radar coverage zones.

One possibilty of suddenly going to zero altitude is cycling the switch through Mode C-off while turning it to totally off. I wonder how long the altitude data coasts if the tag is coasting?

I'm not if China wants to reveal the quality of its satellite images, but China could easily give coordinates rather than images.

As you note, Mode C can be turned off while leaving the beacon operational. In that case, the track would show XXX where we would expect to see an altitude readout in 3 digits. If the track has lost the transponder altogether, it shows "CST" which stands for coast, or "UNA" which means unassociated with a target. The misleading part for the operator is that those often time-share with other information, such as type aircraft or route (the tag is very compressed), and a symbol which denotes the tag overlays the actual target. If the operator is "working the tags" rather than the targets, which is a very common error, they may not notice that the tag has no actual aircraft it's associated with.

In the Air France case, the least likely reason for them to not hear from an overseas flight is that something bad actually happened. It's common to lose contact with over water/polar flights, though the satellite network and its associated commercial providers like ACARS have made huge improvements just in the last 10 years. So they would have assumed that they just lost comm over the Atlantic, not that they lost the airplane, until they didn't acquire it at the correct time.

Never doubt a small group of concerned citizens can change the world; it's the only thing ever has

March 12th, 2014 at 7:14:52 PM permalink
Pacomartin Member since: Oct 24, 2012 Threads: 1068 Posts: 12569	The Chinese satellite images of the three large objects is only around 140 miles from the last known point of the aircraft. It seems like it should have been in the initial search area.

March 13th, 2014 at 12:08:59 AM permalink
Fleastiff Member since: Oct 27, 2012 Threads: 62 Posts: 7831	Scanning the headlines and polishing off the last of a six pack of cider, I find two authoritative statements. The plane attempted a turn and tried to return to Malaysian airspace. The plane flew onward for four hours after the LKP, based on ACARS data stream.

March 13th, 2014 at 3:53:47 AM permalink

Pacomartin

Member since: Oct 24, 2012
Threads: 1068
Posts: 12569

Quote: Fleastiff
The plane flew onward for four hours after the LKP, based on ACARS data stream.

The 11th press release from Malaysia Airlines addressed ACARS without mentioning that fact.

Quote: MH370 Flight Incident

Tuesday, March 11, 11:15 AM MYT +0800 Malaysia Airlines MH370 Flight Incident - 11th Media Statement

The B777-200 aircraft that operated MH370 underwent maintenance on 23 February 2014, 12 days before this particular flight on 8 March 2014. The next check is due on 19 June 2014. The maintenance was conducted at the KLIA hangar and there were no issues on the health of the aircraft.

The aircraft was delivered to Malaysia Airlines in 2002 and have since recorded 53,465.21 hours with a total of 7525 cycles. All Malaysia Airlines aircraft are equipped with continuous data monitoring system called the Aircraft Communications Addressing and Reporting System (ACARS) which transmits data automatically. Nevertheless, there were no distress calls and no information was relayed.

March 13th, 2014 at 6:50:33 AM permalink
odiousgambit Member since: Oct 28, 2012 Threads: 154 Posts: 5098	The latest is that the engines sent a signal for the manufacturer to monitor, but this did not track the plane. However, the signal continued so long that the radius of the search area is now 2200 miles! Hijacking now a theory. I'm Still Standing, Yeah, Yeah, Yeah [it's an old guy chant for me]

March 13th, 2014 at 7:08:14 AM permalink
Pacomartin Member since: Oct 24, 2012 Threads: 1068 Posts: 12569	Quote: odiousgambit The latest is that the engines sent a signal for the manufacturer to monitor, but this did not track the plane. However, the signal continued so long that the radius of the search area is now 2200 miles! Hijacking now a theory. Malaysia dispute that claim.

March 13th, 2014 at 7:29:59 AM permalink

boymimbo

Member since: Mar 25, 2013
Threads: 5
Posts: 732

The thing is, that if it were a hijacking, to what end? So, now you're the proud owner of a Boeing 777 with 200+ souls. You issue no demands? Hijacking has a purpose, or at least, it's supposed to.

And where are you going to land the plane? Vietnam? Cambodia? China?

There are plenty of fishy things -- no communication from the cockpit, no debris, no ACARS data, conflicting reports... the plane really vanished.

March 13th, 2014 at 11:09:57 AM permalink
Pacomartin Member since: Oct 24, 2012 Threads: 1068 Posts: 12569	China has now said the satellite images are not the jet. I am a little puzzled by this idea of searching the Indian Ocean. You can't search the entire Indian Ocean by ship or plane. They must have some information.

March 13th, 2014 at 3:35:11 PM permalink
rxwine Member since: Oct 24, 2012 Threads: 189 Posts: 18756	Heard that 9 days is the longest a modern jet like this has ever been missing. Close to breaking that record. You believe in an invisible god, and dismiss people who say they are trans? Really?

March 13th, 2014 at 3:44:56 PM permalink
Pacomartin Member since: Oct 24, 2012 Threads: 1068 Posts: 12569	Quote: rxwine Close to breaking that record. If they are searching SOMEWHERE in the Indian Ocean, consider the record broken. The Malaysian government should never have told the relatives of the survivors that they will never give up.

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