If you purchase an aviation map (Sectional Chart) it will show airways
based on flying from VOR to VOR, and many pilots still use these for
navigation even when GPS is on board. In my Instrument Proficiency
Checkride last week, the instructor asked me after practicing a bunch
of maneuvers to use triangulation to figure out without looking out the
window where we were. When I showed him the general area we were
located, he asked me to fly to one of the VORs using the 260 degree
radial. This required flying north until the needle centered, then
turning to 260 degrees.