Peter Duniho wrote:

"Ron Natalie" wrote in message
...

But they are not controlled airspace in themselves.


I never said they were. You are correcting a statement that was never made.


[...]
It provides different service. A TRSA provides radar service when
class D does not (generally, although there's almost always a class D
tower in the middle of a TRSA).


So I said.


However some class D's provide
radar services without being TRSA's.


So I said. My statement "It provides a higher level of service than that
offered by most towers in Class D airspace" implies just that, and was
intended to.


TRSA's have the side effect of
not necessarily having all the aircraft within it participate, which
makes it inferior to class D and C.


"Inferior" is in the eye of the beholder. Class D airspace without radar
provides NO separation services. A TRSA provides better separation services
than any non-radar Class D.

Doesn't class D airspace provide separation adjacent to the runway to
prevent collisions?




It's not always class E.


It's always within controlled airspace, and the only exception to the Class
E is when it intersects with Class D. None of that contradicts what I wrote
earlier.


It's NOT controlled airspace.


Again (since you seem to be having a hard time comprehending this): I never
said it was.

Pete