LOU wrote on Mar 11^th, 2010 at 9:19pm:

This is a VERY simple example, but thats how it's done. With GPS or LNAV direct routes can be flown, but in the Jurassic Jet we had no such fancy instruments or radios.  ;D Lou

Just coming in late here at an old excellent thread.
LOU back then you were aviators using also what is less known nowadays as dead reckoning !

By using VORs and ADFs you knew roughly where you were and how to steer to get roughly to a desired spot. Back in the days of your flying extreme (lateral) precision did not matter. Nowadays in the effort to squeeze in as much traffic as possible is small chunks of airspace with RNPs and such (accuracy of RNAV navigation performance) things rely solely on accurate LNAV navigation equipment and multiple redundancies.