wrote:
On Sat, 06 Jan 2007 08:21:47 -0800, Sam Spade
wrote:

Pilots are routinely taken below the floor of Class B airspace when
exceeding 200 knots. Most airline pilots have no idea where the
boundaries or floors of Class B airspace are located. No one cares
except the occasional fed on the jump seat who has a thing about it.


This is what I've observed too. Pilots flying hi level do not bother
with low level charts nor class B charts. Only hi level charts and
sid/star charts. Not saying it is safe, legal or proper, just that
it's normal ops.

It is impossible to figure out Class B from a paper chart in a jet
transport with all the more important stuff that has to be done.

With boundaries and altitude limits display electronically, it is
possible but still a lot of distraction. Try it with a Garmin with all
the aural elerts set and it is a pain. With a Garmin, it works well to
avoid Class B when VFR, but to use it to assure containment when on a
clearance within Class B, it becomes overwhelming.

Sam, would it be true too for the 2500 AGL within 4 nm limitation too,
in your opinion?

No. It is far easier to figure out where the stand-alone Class D
airspace is located.

Secondly, is there some atc requirement that if your destination is
the primary airport in a class B, then atc is required to keep you in
class B, and not vector you below?

That is policy to the extent it can be done without creating some other
traffic problem. But, there is no "rule."