Welcome Guest. Sign in or Signup

6 Answers

Just how FAR East?

Asked by: 3284 views , , ,
General Aviation

I'm wondering, is it possible that there is a set nautical mile distance between each isogonic line?  My instincts tell me "no", but I'm not exactly sure.

Also, ff you continue flying East as far as you could fly, would your compass eventually indicate a turn towards the West at some point? 

Ace Any FAA Written Test!
Actual FAA Questions / Free Lifetime Updates
The best explanations in the business
Fast, efficient study.
Pass Your Checkride With Confidence!
FAA Practical Test prep that reflects actual checkrides.
Any checkride: Airplane, Helicopter, Glider, etc.
Written and maintained by actual pilot examiners and master CFIs.
The World's Most Trusted eLogbook
Be Organized, Current, Professional, and Safe.
Highly customizable - for student pilots through pros.
Free Transition Service for users of other eLogs.
Our sincere thanks to pilots such as yourself who support AskACFI while helping themselves by using the awesome PC, Mac, iPhone/iPad, and Android aviation apps of our sponsors.

6 Answers

  1. Gary Moore on Nov 03, 2010

    The max variance seems to be about 30 degrees – so no – you’d never get a west indication…there some good info here – http://avstop.com/ac/8-2.html

    0 Votes Thumb up 0 Votes Thumb down 0 Votes

  2. Gary Moore on Nov 03, 2010

    Looks like the max varience is about 30 degrees – so you are never going to get a west heading.  The varience is based on where you are at the moment – there is some good info here – http://avstop.com/ac/8-2.html

    0 Votes Thumb up 0 Votes Thumb down 0 Votes

  3. Matthew Hammer on Nov 03, 2010

    Isogonic lines indicate areas of constant magnetic variation. That is, they indicate the difference between magnetic north (where your compass points) and true (geographic) north. Ultimately these “lines” meet up at the magnetic poles of the earth, and so the distance between them tends to become smaller towards the poles. You can get a better picture of this by looking at a world map which outlines magnetic variation: http://upload.wikimedia.org/wikipedia/commons/2/28/Mv-world.jpg 
    Note specifically the “tighter” isogonic lines over the eastern United States, and the more “relaxed” lines over the western United States.
    In short, your instincts are correct: there is no set distance between isogonic lines.
    As for your second question: A compass always points north. It doesn’t care about east or west. So as you fly from west to east, the magnetic compass will always show “north” as being off your left wing. When north is off the left wing, east is off your nose. The only way it could indicate a turn is if the earth’s magnetic poles suddenly reversed. 🙂

    +1 Votes Thumb up 1 Votes Thumb down 0 Votes

  4. Flying Ace on Nov 04, 2010

    Of course a compass always points North!  I don’t know why I even asked that!
    I suppose if you flew North…eventually crossing the North pole…you’d eventually be heading South.

    0 Votes Thumb up 0 Votes Thumb down 0 Votes

  5. Flying Ace on Nov 04, 2010

    Now, riddle me this…is there a set distance between each radial withing a VOR?

    0 Votes Thumb up 0 Votes Thumb down 0 Votes

  6. Kent Shook on Nov 05, 2010

    No – The radials extend outward, so there’s a set *angle* between them – But the farther you are from the VOR, the farther apart the radials are.

    +1 Votes Thumb up 1 Votes Thumb down 0 Votes

The following terms have been auto-detected the question above and any answers or discussion provided. Click on a term to see its definition from the Dauntless Aviation JargonBuster Glossary.

Answer Question

Our sincere thanks to all who contribute constructively to this forum in answering flight training questions. If you are a flight instructor or represent a flight school / FBO offering flight instruction, you are welcome to include links to your site and related contact information as it pertains to offering local flight instruction in a specific geographic area. Additionally, direct links to FAA and related official government sources of information are welcome. However we thank you for your understanding that links to other sites or text that may be construed as explicit or implicit advertising of other business, sites, or goods/services are not permitted even if such links nominally are relevant to the question asked.