unicate writes:

The Flight Guide says "not for navigation" too, but their airport
diagrams, readily obvious illustrations of reporting points, traffic
patterns and other details make it a very valuable cockpit resource, as
long as you keep it updated, IMO. If we eliminated all the stuff that
says "not for navigation", we'd have a lot less useful info at our
fingertips.

That's why I think it a bit bizarre that so much is still marked "not
for navigation," even when it is manifestly identical to the
"official" materials.

--
Transpose mxsmanic and gmail to reach me by e-mail.