Originally Posted by
Andy
I learned to use a slide rule in high school before electronic calculators were common and have used an E6B. However, today's system of delivering the numbers to flights is much more accurate than chart chasing of days past.
A two hour delay is the tradeoff for accurate numbers fleetwide. IMO, worth it.
It is more accurate because they built large margins into those numbers. Now days they are shrinking the margins via automation. Margins however can be a good thing in aviation.