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Malaysian Airlines MH370 contact lost

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Malaysian Airlines MH370 contact lost

Old 13th Mar 2014, 17:01
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To answer a question posted earlier, No there is not a separate A/C transponder. The mode S boxes transmit A C and S.

There are 2 strapping modules in the avionics bay that hard code the aircrafts registration number for the transponders.
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Old 13th Mar 2014, 17:01
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snakepit;

At sea level the standard atmospheric pressure is 760 mmHg.
Thank God altimeters are not calibrated in mmHg, I had enough trouble changing from 1013.25 to 29.92
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Old 13th Mar 2014, 17:04
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Malaysian official said they contacted rolls Royce and Boeing and both said their data stopped at same time as Malaysians... that should put a stop to the 4 hour engine data saga, there is no way that both those companies would keep quiet if someone else was telling porkies about their companies!!
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Old 13th Mar 2014, 17:05
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Haystack

If you sift through the signals of the past 6 days, and discard the obvious chaff, you'll see hints of where in the haystack the needle is most likely to be found.
Yes but it would be a good idea if someone could first find the 'haystack'
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Old 13th Mar 2014, 17:08
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U.S Reports "indications"

What type of "indications" would they be referring to that no one else was able to obtain.

Reuters Top News@Reuters 4m
Satellites picked up electronic ping from Malaysian flight MH370 after it lost contact with ground control: source close to investigation


Was this not already discussed as not being a confirmed report?
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Old 13th Mar 2014, 17:16
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A resume of the research :

"here
no there
it went eastbound
no no westbound
oh here some fuel trace
no no, it's from a boat
arfff
oh here some debris!
no no it's not
it was on its route
no no it flew off route
let's search on the west side
oh here a raft
no it's not
oh! here a debris 18/20m
no no it's a joke by chinese
arrff
let's go to Indonesia then."

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Old 13th Mar 2014, 17:16
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Fly26:
what level of equipment is being used to sweep the seabed?
Basically, two things. They are listening for the flight recorder sonar pinger and also using active sonar, including side scan.

One problem with sonar is that the coverage tends to be fan shaped. The deeper the water, the broader a path they can cover on the bottom. The waters where contact was lost aren't very deep. So the strips of bottom covered per pass won't be very wide. On the positive side, the nature of the sea in the search area rules out things like thermoclines and other phenomena that could blind sonar.

If by some chance MH370 made it East to the Philippines or West of Sumatra, there are some deep drenches and rougher bottom terrain to deal with.
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Old 13th Mar 2014, 17:18
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406 ELTs send out a test message for 45 seconds before they go into the crash mode and trigger alarms. It IS possible that the ELT went off for a few seconds before it became separated from its antenna. That test signal might be logged somewhere

It's a hope anyway. At this point the only thing I know for sure is that it is not at KBVU.

Last edited by LASJayhawk; 13th Mar 2014 at 17:19. Reason: iPad auto correct....
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Old 13th Mar 2014, 17:18
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Malaysia is the Last to Know

This is a big scoop for ABC news. Author is Martha Raddatz, absolutely impeccable sources and credentials, great, seasoned reporter.

What's becoming clear to me is that the U.S. (Pentagon and NTSB at very least) have better intel than the Malaysians, and, to protect the extent and sources of such data for reasons of national security and international relations, have had to find back-channel ways (the NTSB radar "advisors," NASA, etc) to leak the correct location of the aircraft to the Malaysians so as to seem to have them organically find it.

Unfortunately, with Vietnam etc. making good-faith efforts and taxing resources in a humanitarian gesture, the U.S. can't wait, sources are leaking to hurry this up. You can bet that was okayed at the highest levels and we have been talking to China.

My current theory is that the plane was hijacked but that the pilot flew it out into the ocean rather than to the specified destination.

This also helps explain why Greg Feith, well-respected former NTSB investigator, was on air recently floating the turn-back/hijack scenario. At the time I thought he'd lost his bearings in all the media hype. Maybe more likely he had inside info.

http://www.nbcnews.com/storyline/mis...inquiry-n51036

Last edited by cynar; 13th Mar 2014 at 17:40.
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Old 13th Mar 2014, 17:19
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US Officials Have 'Indication' Malaysia Airline Crashed into Indian Ocean - ABC News
Tom Costello, NBC, is saying USS Kidd is heading to the Strait of Malacca NOT the Indian Ocean.

So we have two main media sources saying different things...again. Perhaps everyone needs to just slow down a bit. Chaotic information releases.
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Old 13th Mar 2014, 17:20
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RG:
From what an airline source/Malaysia press conference previously released:

(1) They do not appear to have the sattelite option for ACARS, using the VHF option instead.
(2) They apparently did not exercise the "Boeing tracks our ACARS" option in their support contract with Boeing.

Some pages back, a PPRuNer provided a map with a series of notional, overlapping VHF range circles and ground station locations to give an idea of where you would expect to see ACARS(VHF) be able to receive data from an aircraft in flight at cruise altitudes. You can see that there is a bit of a gap west of Thailand. IF, as also discussed in this thread, the RR data system only sends info when something changes, as opposed to "every x number of minutes," then it is very plausible that no message was sent until the plane was in that gap, IF that gap is where it ended up. As you can see, there is a lot of "IF" going on there.

Beyond that, no comment on why Uncle Sam thinks the bird went down in the IO.
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Old 13th Mar 2014, 17:20
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Originally Posted by highflyer40
Malaysian official said they contacted rolls Royce and Boeing and both said their data stopped at same time as Malaysians... that should put a stop to the 4 hour engine data saga, there is no way that both those companies would keep quiet if someone else was telling porkies about their companies!!
Wait. Two questions.
First. Can you please provide a link for this information?

And second. Then why is the aircraft being searched on Indian Ocean? How can the ACARS datalink have stopped at the same time as the aircraft went off radar and the same aircraft have flown hundreds of miles West without transmitting any downlink?

Would someone please care to explain?
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Old 13th Mar 2014, 17:20
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Pinch of salt...

There have been so many leaks, which have then been dismissed by the Malaysians, that it's easy to start taking a pinch of salt with every new tidbit that pops up. Even so-called reliable media sources have seen their sources dismissed.

So what, if anything, do the US know that led them to redeploy the Kidd at top speed?
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Old 13th Mar 2014, 17:20
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New search grid


Source: The Telegraph
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Old 13th Mar 2014, 17:21
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JMO, of course, but I think that high level politics is going on here. Civilian unrest meets DHS, whether of the USA, or China, or another sovereign state. Given the sophistication of modern military science, I think one or all know what happened, and where it is, and figure that high level security requirements take priority, and since they're all dead, they don't care. Let everybody run around like headless chickens, that's the price. JMO, as I said.
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Old 13th Mar 2014, 17:24
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If MH370 turned west from its last known position and, if it passed close to Pulau Perak as reported earlier by the Malaysian authorities, it would be on a track of 255 degrees (approx.). If it had enough fuel for 3000 nautical miles it could have come down about 200 miles south of the Seychelles.

A lot of "ifs", I know, but is this the scenario the Yanks are investigating?
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Old 13th Mar 2014, 17:25
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Barrel_owl

If, and it's a big IF, the US is onto something in the Indian Ocean, then a whole lot of questions suddenly pop up, don't they?

Like how come RR and Boeing apparently have no data supporting the theory?

Like why the heck they've wasted 5 days searching an area where they seem to think the aircraft didn't go down?

Like who is actually directing the SAR ops?

And many more...
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Old 13th Mar 2014, 17:30
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If it is found in the Indian Ocean, I along with quite a few others have stated that it might be there on this thread, obviously a hunch. Depressurisation would be the main candidate if it was found to be there I would have thought. The Malaysians might be in for an even rougher ride if MH370 flew straight back over their heads during the incident and rightly so.
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Old 13th Mar 2014, 17:34
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EEngr

Thank you for the information, I was trying to figure out how accurate the search was, so in theory if it was there they would have come across it. If the decompression/hypoxia/reciprocal heading theory that many people suggest is anything to go by the MSAs around North Sumatra are high up to 13400, that terrain could hide an aircraft as well. It took a while to locate the sukhoi crash although weather did play a part hampering the search.
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Old 13th Mar 2014, 17:39
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The search area given by The Telegraph would make sense if it was established that the unidentified radar contact heading west was not picked up by Indian primary radar on the Andamans or Nicobars. The logical thing would be to comb that radar coverage gap in the middle with no primary radar coverage from either side.

If the "UFO" diverted to the SW (direction Diego Garcia) in that potential radar gap nobody would have noticed. Such a hypothetical diversion would bring into play the Pentagon. In Diego Garcia there must be some impressive surveillance equipment, AWACS and the like. Maybe something was picked up there ?
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