Nicolaki From , joined Dec 1969, posts, RR:
Reply 2, posted (13 years 3 months 2 weeks 6 days 23 hours ago) and read 855 times:
Really I am not familliar with CLE but i guess these instructions could be DP's (Departure Procedures).
Apparently I'm looking at KCLE diagram at www.aeroplanner.com and it shows that it has no 06's runways but 2 05's.
Assuming these are the ones you are talking about an aircraft taking off from these runway and being cleared to turn to 010 would do a 40 degrees left turn.
If an aircraft was still taking off from anyone of the 05s runways and was cleared to turn to 095 it would make a 45 degrees right turn (095 - 050 = 45).
The a/c "turn left heading 010" end up going approximately due north, or 18 heading. I'm guessing this means the direction is to "turn left ten degrees from where you were flying originally" or 16?
I'm not trying to sound like bashing you or anything but you don't seems to fully understand either the cardinals heading or the runway numbering system
The best way i could explain this to you is by asking you the following question.
"What would be the numbers painted on the west side of a west-east oriented runway?" If you answered 27 it is not the correct answer. 09 is. See it depicts not where the runways "is" but what heading you would be following after takeoff.
I hope I have been easy to understand cause i don't even dare reading back what i wrote haha
Lsjef From , joined Dec 1969, posts, RR:
Reply 3, posted (13 years 3 months 2 weeks 6 days 22 hours ago) and read 845 times:
Hey, RednGold, I saw your reference to this question earlier on Johan's thread about improving the forum, and it made me chuckle a bit. Since it has alot to do with both flight and ATC procedures, I'm glad you chose to post here in Civil Aviation. As an ATC, I've seen lots of questions like this over the years where even experienced pilots are baffled. This one is actually pretty simple...
You probably already know that runway numbers are based on magnetic headings using a 360-degree compass; thus, runway 18 has a magnetic heading of roughly 180. KCLE's runway 5L and 5R have headings of 057-degrees magnetic. Departing pilots are issued headings to establish course divergence and achieve separation in accordance with ATC regulations, and to achieve efficiency and noise abatement. Some CLE departures will be given "Turn Left Heading 010" off RY 5L/R, while others will get "Turn Right Heading 045". You may find that some headings are given only to smaller GA flights, to get them out of the commercial departure streams. Or, you may find ORD and other west departures get heading 010 while everything departing to EWR and other points east gets the 045 heading.
In any event, all these numbers are no more than simple magnetic headings based on a 360-degree compass. They only seem more significant because they are rattled off so fast by ATC and pilots...
Hope this answers your question. Glad to field any others related to ATC.
Redngold From United States of America, joined Mar 2000, 6907 posts, RR: 44
Reply 5, posted (13 years 3 months 2 weeks 6 days 3 hours ago) and read 822 times:
Thanks, Jeff, your answer was helpful.
Nicolas, I know exactly what the cardinals are.
The only reason I wrote "18" instead of "180" and "16" for "160" was because I was using runway shorthand. I'll try to be more proper next time.
For your information, Cleveland changed its main runway headings from 5L/23R and 5R/23L to 6L/24R and 6R/23L two weeks ago today. I know my runways -- I'm out there radio scanning and taking pictures almost every day!
Some of us here aren't pilots. Give us a chance to learn instead of pointing out what we don't already know.
Lsjef From , joined Dec 1969, posts, RR:
Reply 6, posted (13 years 3 months 2 weeks 6 days 2 hours ago) and read 814 times:
No surprise on the change in runway numbers. Runway numbers change as the magnetic declination slowly drifts; at PDX, they changed from RY02-20 to RY01-19 a few years ago.
There may also be a little confusion about whether ATC is instucting pilots to turn X degrees or to a specific heading. You may hear two standard phraseologies:
"TURN LEFT HEADING 010, RY 6L, CLRD FOR TAKEOFF" or
"TURN TEN DEGREES LEFT, FOR TRAFFIC..."
If you really want to get to the root of these questions, see the FAA's 7110.65, ATC Manual, Chapter 5, Sections 6 and 8. If you don't already have it bookmarked, use Google to search 7110.65; it'll take you right to it.