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Submitted by ericd19320 on Thu, 09/15/2011 - 10:58
Forums: 
Reading Charts
hey guys I'm New to this site and flight planing. My question is about course. When a plan is created there are 2 courses shown on the plan for example 138 and 183. Why the 2 paths? which course should I follow? can someone that understands my question please provide some insight. thanks eric

Submitted by dgarley on Mon, 09/19/2011 - 14:12
I assume you referring to the notation (for example if the route is KJAX KTPA) you see 200 and (197T). 200 is the "magnetic course" , it is based on the "magnetic North Pole" and magnetic fields in the earth. 197 is the "true course". True meaning it references the "Geographic North Pole" which is based on a specific geographical location, not magnetic fields. True north and magnetic North are not in exactly the same place. Chapter 15 of the PHAK discusses navigation and charts. http://www.faa.gov/library/manuals/aviation/pilot_handbook/media/PHAK%20-%20Chapter%2015.pdf

Submitted by rjdahlen on Thu, 09/29/2011 - 04:33
Eric, Are you referring to two numbers on a Victor airway? If so, it is merely 2 airways running together for a length. The one you use is up to you. If one of them runs further along your intended route, then use that one. Otherwise, it doesn't matter which one you use and they both take you to the same fix.
Rich Dahlen

Submitted by Liberator on Sun, 02/19/2012 - 12:47
I think what you're seeing is direction and distance. Todd

Submitted by dpk1nba on Fri, 02/24/2012 - 12:46
Dgarley got it right....flight plan shows mag & true course

Dan

Submitted by mark1 on Wed, 03/27/2019 - 08:41

hi all,

i want to fly from EGGW to EGSH in great Britain and when i enter that in Skyvector there is a text that says 52 degrees and 78nm. so i  want to depart eggw from runway 08 so i set heading to 80 and do i set course to 52? very basic question but then hey, i'm a basic sort of guy.

if you can help it'd be great and set ME on the right course.