Welcome Guest. Sign in or Signup

1 Answers

how i calculate magnetic heading from magnetic trac eg: tas 290 and wc -8

Asked by: 3955 views Commercial Pilot, Flight Instructor


 how i calculate magnetic heading from magnetic trac eg: tas 290 and wc -8

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.

1 Answers

  1. DC on Jan 19, 2012

    I’m not entirely certain what you mean by “magnetic trac”, but I’ll try to answer your question. Here’s the general formula for figuring out which to fly to get from point A to point B:
    TC ± WCA = TH ± VAR = MH ± DEV = CH

    TC (true course): You obtained this by drawing a line on your chart and using a plotter to determine the true course.
    WCA (wind correction angle): You obtained this by checking winds aloft at your planned altitude and using a computer (e.g., an E6-B) determined this value.
    Now you have the TH (true heading).
    VAR (magnetic variation): You obtain this by looking on your chart for the isogonic lines (purple dashed line) closest to your route of flight. These lines are labelled with a number to gives the difference between true and magnetic north in that region. If the variation is easterly (E) you SUBTRACT the value, if it’s westerly (W) you ADD the value to your TH.
    Now you have MH (magentic heading).
    DEV (deviation): You obtain this by looking at the compass deviation card in your aircraft and applying the correction closest to your MH.
    Now you have CH (compass heading). Take off, turn to this heading, and you’ll get from point A to point B (assuming the winds don’t change enroute).


    +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.