vywh
Posts: 278
Joined: Tue Feb 05, 2002 6:37 pm

What Does That Mean?

Mon Feb 18, 2002 2:13 am

it's a conversation between the ATC and the pilot.Can someone please explain these sentences in detail?

"... climb FL230, cross DKB at FL200 or above"
"... turn right heading 150"
"... turn left by 20° and report that new heading"
"... maintain present heading"

Cheers.
 
EGGD
Posts: 11880
Joined: Sat Feb 24, 2001 12:01 am

RE: What Does That Mean?

Mon Feb 18, 2002 2:27 am

I'm at severe risk of getting flamed here, by some of the 'experts' but here goes..

"climb FL230, cross DKB at FL200 or above", This sentance means for the pilot to increase altitude to 23,000ft (FL230), and to make sure that he crosses DKB, which I believe is a VORTAC, at at least 20,000ft or more (given his assigned altitude he has to make sure he is between 20,000ft and 23,000ft when he crosses the DKB VOR).

"turn right heading 150", now this is where I am at risk of getting flamed. Translate this as make a right turn, to 150 degree's (although I keep thinking that its turn 150 degree's to the right, hehehe Big grin).

"Turn left by 20 degree's and report that new heading", now this probably backs up the last sentance, the pilot is most likely heading 150 degrees (roughly SSE) and the ATC would like him to turn left 20 degrees (which SHOULD be 130 degrees, which is almost exactly South East), and then contact ATCO to tell them their exact heading, which should be 130 degree's or thereabouts.

"maintain present heading", uhhh... keep heading in the same direction as you are currently flying Big grin.

Did I screw up? Are all you experts mad at me?

Dan  Smile
 
IMissPiedmont
Posts: 6200
Joined: Wed May 23, 2001 12:58 pm

RE: Eggd

Mon Feb 18, 2002 3:33 am

Furious! How dare you be correct?  Laugh out loud
The day you stop learning is the day you should die.
 
Guest

RE: What Does That Mean?

Mon Feb 18, 2002 3:38 am

You nailed it DAn good job!  Laugh out loud
I would like to think of myself as an "Expert" in this field Big grin
 
Guest

RE: What Does That Mean?

Mon Feb 18, 2002 3:58 am

quick, go take your instrument written before you forget. You nailed it.
 
Guest

RE: What Does That Mean?

Mon Feb 18, 2002 4:17 am



One clarification I would make is that, at least here in the US, "flight level" is not so much an altitude, but a pressure level, since all airplanes set their altimiter to 29.92"hg (or 1013.25mb) over 18,000 feet Mean Sea Level (MSL), rather than the local altimeter setting. So flight levels do not reflect hieght above MSL, unless the local altimeter setting is 29.92" (1013.25mb).

 
vywh
Posts: 278
Joined: Tue Feb 05, 2002 6:37 pm

RE: What Does That Mean?

Mon Feb 18, 2002 12:40 pm

Thanks to you all experts....it's an excellent explanation......I really appreciate it.

Cheers.
 
XFSUgimpLB41X
Posts: 3960
Joined: Fri Aug 25, 2000 1:18 am

RE: What Does That Mean?

Mon Feb 18, 2002 1:20 pm

Haha.. i know someone would come on here adding an explaination about the pressure altitude thing.

I was thinking about answering it this mornning. but didnt feel like explaining pressure altitude, knowing i'd get "corrected"... didnt post. Crazy i tell you!
Chicks dig winglets.
 
Guest

RE: What Does That Mean?

Tue Feb 19, 2002 12:05 am



Well, I hope it doesn't seem like I was flaming, because I wasn't. EGGD had it all exactly right except for that one little part. And I thought it was worth mentioning.
 
EGGD
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Joined: Sat Feb 24, 2001 12:01 am

RE: What Does That Mean?

Tue Feb 19, 2002 1:20 am

Thanks NormalSpeed, I didn't know that. I'd just assumed it was altitude (because, thats what I had just assumed as I learnt the basics). Is there much differenciation between the altitude above MSL and the pressure reading?
 
Ralgha
Posts: 1589
Joined: Tue Nov 09, 1999 6:20 pm

RE: What Does That Mean?

Tue Feb 19, 2002 3:07 am

Quick! Someone save this thread and put it in a historical archive, I think it's the first time the original question hasn't been answered the same way ten times by ten different people.  Big thumbs up
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Guest

RE: What Does That Mean?

Tue Feb 19, 2002 8:28 am



Ok, say you are flying along at FL290, and your altimeter is set at 30.26"hg, rather than 29.92". You can use this formula (at least for inches).

29.92-30.26 = -0.34
-0.34*1000ft = -340ft

So, the actual flight level you should be flying at is 340ft lower than the MSL altitude. Not much, but could make a difference.
 
IMissPiedmont
Posts: 6200
Joined: Wed May 23, 2001 12:58 pm

RE: NormalSpeed

Tue Feb 19, 2002 12:49 pm

So true. But if you are flying at 290 with the altimeter set at 3026, you are making a rather large error.
The day you stop learning is the day you should die.
 
Guest

RE: NormalSpeed

Tue Feb 19, 2002 12:57 pm

So true. But if you are flying at 290 with the altimeter set at 3026, you are making a rather large error.

Yeah. I sort of thought that was implied.
 
User avatar
TS-IOR
Posts: 3498
Joined: Mon Oct 08, 2001 9:44 pm

RE: What Does That Mean?

Wed Feb 20, 2002 12:11 am


ATC asked the pilot to climb to 23.000 ft Std.
DKB is a VOR and due to traffic the flight had to adjust
his rate of climb so as to cross DKB at or above FL200.
"Turn right hdg 150" : If the acft was flying north,it had
to make a U turn and set course toi the South-East !
After the acft had been established to its new direction
the ATC asked for another 20° by the left !
The heading will be 130° !!!
(If the ATC asked for 20° by the right, the heading
would be 170° !)
The acft had to maintain its course to the East-S-East.

 
Ralgha
Posts: 1589
Joined: Tue Nov 09, 1999 6:20 pm

RE: What Does That Mean?

Wed Feb 20, 2002 2:14 am

Hmm, thought the question had already been answered......guess we spoiled this thread's potential as a history marker.  Big thumbs up
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