"Richard Russell" wrote in message
...

That statement is indeed true but I think most VFR pilots are aware of
that. What many are not aware of is what happens horizontally at the
outer border of the magenta vignette where the Class E with a 1200'
floor begins. This is not marked on charts in the northeast and
middle atlantic areas of the country.


It isn't marked anywhere in the country any more. It used to be, but blue
vignette showing controlled airspace beginning at 1200' AGL that abutted
magenta vignette was dropped a few years ago. It's now just understood to
be there. Grab a recent Sectional Aeronautical Chart, you'll find "Class E
airspace exists at 1200' AGL unless otherwise designated as shown above" in
the legend.