http://phenomena.nationalgeographic.com/2016/06/08/how-to-read-an-aeronautical-chart/

The first time I saw an aeronautical chart, best I can recall, was
at the little airport café in Half Moon Bay, California, while waiting for a
table. The coastal mountains and cities scattered around San Francisco Bay were
easily recognizable. But superimposed on that familiar landscape were cryptic
numbers, strange symbols, and overlapping circles that hinted at an entirely
different world in the skies above.

“It looks pretty complicated, doesn’t it?” says Brendan Quinn-Narkin, a
commercial pilot and certified flight instructor in Northern California. Quinn-Narkin
sells instructional videos for pilots online, and he recently volunteered to
help me make sense of these maps, which pilots use for planning and navigation.

Thanks to Tom Lanning.

For my part I rely on the electronic versions that are read by SeeYou and are
used for task planning.