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Rule of thumb for figuring distances betweeen two points without GPS

Posted by on July 21, 2008 0 Comments Category : Flight Instructor Blog Tags :

This question comes from David:

How do you find an intersection that is off the airway your on without GPS/loran or a vector from ATC.  For example, let’s say your over PXN (cental california) cleared to the Oakey intersection.  Once I set up my radials to identify the fix, how do I estimate my ETA at Oakey without knowing the exact distance?

Thanks for your question David. To answer you question, I created a video tutorial showing you how to use a easy to remember rule of thumb that works especially well if you course is north-south (such as it is in your case).   I hope this helps.  Let me know if you have any other questions and remember to…

Fly Safe!

By the way, if you are curious about the desktop ruler I used in the demonstration, it is available at:


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