"Clyde Torres" wrote in message
...
Does anyone here know if Canada's class C is equivalent to the USA's class
B? A Canadian has told me this is so and that the USA does not follow
ICAO
convention. Is this true?

The class of airspace tells you what separation is provided by ATC. In
class B, all flights are separated. In class C, IFR flights are separated
from everything else, but VFR flights are not separated from each other.
This distinction is part of the ICAO classification scheme and is the same
the world over.

Where the US differs from ICAO (and the rest of the world) is in allowing
VFR flights to operate in class C and D airspace without an explicit
clearance, replacing this with a requirement for two-way comms. From an
operational point of view I've never really understood the purpose of the
distinction. The pilot is required to obey ATC instructions in class C just
as in class B.

Julian Scarfe