Charts"The digital chart revolution is coming, or so we're told," Zimmerman said. "But so far, at Sporty's, we sell as many paper charts today as we did 10 years ago, and there are no signs of the sales slowing down." According to Zimmerman, there are two issues that keep paper charts in vogue; first, most people are still uncomfortable with digital charts; and second, most people who do use digital charts aren't quite ready to pitch their paper charts, so they buy them as backup. Until more cockpits are equipped with adequate panel-mounted displays to present the charts and the portable EFB (electronic flight bags) become more convenient-and less expensive-there will still be a requirement for paper charts. "Someday pilots will stop carrying paper charts in their bags, but I don't think it will happen any day soon. In the meantime, all kinds of paper charts-sectionals, low en route charts and approach charts--will continue to be essential and widely carried."