Your avionics likely does a great job at straight-and-level flight, approaches, etc. But can it fly the patterns old-timers learned to get through their check rides?
At far right is a four-course range approach plate for Joliet, Ill., circa 1957. At center right, courtesy Doug Davis and his excellent Flying The Beams web site, flyingthebeams.com, is a graphic description of how the four-course, or low-frequency, range worked in practice. Start at the lower right and proceed clockwise through the four major steps required to find the destination airport in poor weather.
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