Dropping I mean could be dropped from processing, since they are on the
airways db...
No need to process fixes, if they are already in the airways list. They are
still listed, but not processed.
Only start and end of the airways are processed.

Extend as far as needed. (ie 250 miles from centerline... no need to
calculate fixes beyond this unless you wanted to.)

Just wanted to spark up the discussion

Hank