Originally Posted by ka4wja
c) Some old timers (myself included) have also used "great circle routing charts"....but now-a-days (with daily weather
info/forecasts), you're more likely to be changing course, looking for good wind
(or calmer weather), rather than staying on one course the whole way and "praying" that you'll make it!
John missed this post the first time but to reiterate...the Great Circle charts
are nice to use because as you say with forecasts and route
changes the odds are you will not stay on a given great circle route
However, your daily route plot overlaid on the great circle chart is nice because it shows with a glance the relative efficiency of your path. Any deviation from any straight line to your destination
is extra miles you are traveling.
Additionally, these charts give you a different way to view the world.