Class B airspace notation

wrote:
On Dec 16, 12:11 pm, Mxsmanic wrote:

BillJ writes:

I thought I understood everything that could be on a sectional, but
before a trip to New York City airspace, I studied the sectional and
terminal area charts a little extra carefully. Just southwest of Newark
(EWR) (and also other places) there is a notation such as 70/+12 in blue
for the floor and ceiling of class B airspace. What does the "+" mean?

Above, but not including 1200 feet MSL, presumably (although I've never seen
this myself).


What is the practical difference between "above, but not
including" (e.g., +12) and "above and including" (e.g., 12)?

One foot.