As per last post.... Is there a pic showing V-495? Is this the flight path normally used by smaller aircraft?
V23E = V495
Would a layperson in 1971 be able to get hold of these maps? In 2018 I got mine online and on eBay. What would it take in 1971? An inside contact?
In 1971 anyone with a few dollars could buy these maps at just about any aviation flight operation or airport. They were published by the USA Government Printing Office and the FAA mandated their use by US pilots for VFR and IFR flight operations. Or you could buy subscriptions for the numerous VFR and IFR maps and IFR approach plates from the USA GPO.
For the IFR maps and approach plates, the Jeppesen Company, which is now owned by Boeing Aircraft, was the preferred choice of most airlines and IFR pilots and those publications contained the same information as the GPO publications but in a slightly different format. But there was absolutely nothing secret about them and they were intended to be widely distributed.
As I have previously posted, the 1971 IFR charts that the hijacked airliner flight crew would have been using (or their Jeppesen equivalent) are available on Sluggo's web page as well as at the Washington State History Museum site.
Just exactly what kinds of maps did you get online in 2018 and on eBay?
Also, are you in the USA?