Welcome Guest. Sign in or Signup

3 Answers

Do ELECTRONIC flight computers have isogonic line values factored into them? If so, how does it know where I am departing from, etc?

Asked by: 3559 views General Aviation, Student Pilot

Elctronic E6B's, such as the CX-2, are useful in calculating a number of functions; one of which is true heading. 

However, I never "tell" the electronic E6B the location of my departure OR my destination.  Therefore, HOW can it calculate true heading without knowing which isogonic line to factor in?

It DOES calculate true heading...I'm just not sure how it "knows" where I am in order to calculate the magnetic variation factor required for my true heading.


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.

3 Answers

  1. Jason Schappert on Oct 30, 2010

    It doesn’t know where you are.
    I know on the sportys model you input your varients. not sure on the cx-2

    0 Votes Thumb up 3 Votes Thumb down 3 Votes

  2. Best Answer

    Gary Moore on Oct 30, 2010

    You would have to adjust that ‘true heading’ for isogonic – just like you need to adjust it for compass error…

    +1 Votes Thumb up 1 Votes Thumb down 0 Votes

  3. Lindsay Atkins on Oct 30, 2010

    Oh, right!  Then it will give me my magnetic heading!  Sorry, I was confusing true heading with magnetic heading.

    0 Votes Thumb up 0 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.