Finding the degrees between two headings
I have what I'm sure is a relatively simple problem, but the answer eludes me. (Headbang)
What is the equation to determine the number of degrees between two compass headings? For example:
If Heading 1 is 350 degrees & Heading 2 is 10 degrees then the delta is 20 degrees
If Heading 1 is 350 degrees & Heading 2 is 317 degrees then the delta is 33 degrees.
One other thing; the delta can obviously never be greater than 180 degrees.
All help appreciated.