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Old 04-19-2014, 11:00 AM
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Default MH370 transcript - explanation request

Hi,
I have been reading the MH370 cockpit transcript (available here: http://www.bbc.co.uk/news/special/20...transcript.pdf), and I don't understand the instruction given by ATC to the aircraft at 12:26:39, namely: "MAS 370 is cleared to Beijing via PIBOS A Departure Six
Thousand Feet squawk two one five seven".
Could you explain what is the meaning of this instruction, that is, what is ATC instructing the aircraft to do? In particular, I don't understand what the "six thousand feet" part refers to.
I'm not a pilot, so I have no working knowledge of technical matters.
Thanks for your help.
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Old 04-19-2014, 11:23 AM
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Very simple.

MH 370 was cleared to depart via a S.I.D which stands for a Standard Instrument Departure. A SID is a standard routing that a pilot navigates. SIDS are put into place so that all departing aircraft fly the same routing after departure. The name of this particular SID is the PIBOS A.

The controller then cleared MH 370 to climb and maintain 6,000 feet altitude on departure. "Squawk 2157" means that the ATC transponder code assigned to this flight was 2157.
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Old 04-19-2014, 11:43 AM
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6000 feet is the initial assigned altitude. They would be subsequently cleared to higher altitudes with traffic and airspace permitting.
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Old 04-19-2014, 12:15 PM
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Shouldn't this thread be in the Flight Training section, and how do you guys live with yourselves stealing from starving CFI's by giving free dual?
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Old 04-19-2014, 12:24 PM
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Originally Posted by mintaka View Post
Hi,
I have been reading the MH370 cockpit transcript (available here: http://www.bbc.co.uk/news/special/20...transcript.pdf), and I don't understand the instruction given by ATC to the aircraft at 12:26:39, namely: "MAS 370 is cleared to Beijing via PIBOS A Departure Six
Thousand Feet squawk two one five seven".
Could you explain what is the meaning of this instruction, that is, what is ATC instructing the aircraft to do? In particular, I don't understand what the "six thousand feet" part refers to.
I'm not a pilot, so I have no working knowledge of technical matters.
Thanks for your help.
So are you a reporter who is now after 5 posts on APC an aviation expert? You'd be better informed than many of the aviation "experts" I've seen on CNN during this mess.
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Old 04-19-2014, 01:54 PM
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No, I'm not a reporter, I'm just trying to understand. If 6,000 feet indicates an altitude, could you explain why ATC doesn't say "flight level" before the number? Could 6,000 feet refer to the runway separation distance for take off?
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Old 04-19-2014, 02:11 PM
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Originally Posted by mintaka View Post
No, I'm not a reporter, I'm just trying to understand. If 6,000 feet indicates an altitude, could you explain why ATC doesn't say "flight level" before the number? Could 6,000 feet refer to the runway separation distance for take off?
No.

"Flight levels" are altitudes where the altimeter is always set to standard 29.92 in/HG or 1013 hPA. They are above the "transition level/altitude," below which you refer to the actual altitude, like 6000 feet and use the local altimeter setting. In the US, transition level and altitude are the same at 18,000 feet. Transition varies from region to region, but 18,000 is routinely used in many places.
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Old 04-19-2014, 02:23 PM
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Originally Posted by mintaka View Post
Hi,
I have been reading the MH370 cockpit transcript (available here: http://www.bbc.co.uk/news/special/20...transcript.pdf), and I don't understand the instruction given by ATC to the aircraft....
You already asked this question, and got an answer. LINK.

You should, at the very least, continue the previous discussion rather than starting up a new topic.

Was there something you didn't understand about my initial answer?
Or was it just not the answer you wanted?
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Old 04-19-2014, 03:14 PM
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Originally Posted by abelenky View Post
You already asked this question, and got an answer. LINK.

You should, at the very least, continue the previous discussion rather than starting up a new topic.

Was there something you didn't understand about my initial answer?
Or was it just not the answer you wanted?
I read your previous explanation, and thought you did a pretty good job!
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Old 04-19-2014, 03:46 PM
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Originally Posted by mintaka View Post
No, I'm not a reporter, I'm just trying to understand. If 6,000 feet indicates an altitude, could you explain why ATC doesn't say "flight level" before the number? Could 6,000 feet refer to the runway separation distance for take off?
Above the transition level all airplanes use a standard Altimeter setting 29.92 inches of mercury or 1013 Millibars. All aircraft are required to be on an instrument flight plan when above the transition level and the common altimeter setting means that all airplanes will be at the same altitude.

Below the transition level airplanes use a local altimeter setting. Altimeter setting change with place to place so there is a chance for altitude errors below the the transition level if two panes are flying with different altimeter settings.
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