In article ,
Christopher Brian Colohan wrote:

North of Boston you will find a large white-ground circle outlined by
a thick cyan dashed line.

Not anymore (look at the 74th edition of the NY sectional)


The meaning of white ground or a thick cyan dashed line is not defined
in the chart legend, nor is it defined in the book you point at. Any
guess what this is? (And why the FAA thinks it is worth putting on
the chart, but not worth documenting what it means?)

On the 73rd edition of the NY sectional there is indeed a note
that P-67 is expanded by special notam.

--
Bob Noel
Looking for a sig the
lawyers will hate