TRSA and /X

Steven P. McNicoll wrote:

"Dave S" wrote in message
nk.net...

I have yet to see a TRSA encompass class G airspace (other than the
presumption that ground to 700 feet is included) but from a logical
standpoint it seems counterintuitive to provide "control" to traffic in
"uncontrolled" airspace.



The only place TRSAs reach the surface is within the core Class D surface
area. The outer boundary of a TRSA does not extend below the base altitude
of Class E airspace.

http://makeashorterlink.com/?M2B843C3B

Please take a look at KRME on a sectional chart and compare what you see
to your statement above. The TRSA is charted as descending to the
surface in the immediate vicinity of KRME, which is Class G airspace
below 700'. A nearby airport has Class D airspace, however RME is not
in (or under) the class D airspace.

"Jessica Taylor" wrote in message
...

The only place TRSAs reach the surface is within the core Class D surface
area. The outer boundary of a TRSA does not extend below the base
altitude of Class E airspace.

http://makeashorterlink.com/?M2B843C3B


Please take a look at KRME on a sectional chart and compare what you see
to your statement above. The TRSA is charted as descending to the surface
in the immediate vicinity of KRME, which is Class G airspace below 700'.
A nearby airport has Class D airspace, however RME is not in (or under)
the class D airspace.


I don't have a current New York sectional, but I did look at KRME on
Aeroplanner.com and I also examined an old sectional from when Griffiss AFB
was still open. Please see my comments about that in another message in
this thread. Please also compare my statement above to what the AIM has to
say about TRSAs.

http://makeashorterlink.com/?M2B843C3B

"Guy Elden Jr" wrote in message
oups.com...

Something I've always wondered... why do TRSAs even exist?


Good question. Nobody seems to know the answer.



Seems like a dangerous proposition to choose some airports as having the
concept of a voluntary controlled airspace?


What seems dangerous about it? TRSAs exist in Class D and Class E airspace
but are not in themselves controlled airspace.



Why not a Class C (their closest
cousin as far as I can tell)?


Part of the Airport Radar Service Area (ARSA) plan was to eventually replace
all TRSAs with ARSAs, which are nor Class C airspace. But not all TRSAs met
ARSA requirements.

Seems like a dangerous proposition to choose some airports as having the
concept of a voluntary controlled airspace?


What seems dangerous about it? TRSAs exist in Class D and Class E airspace
but are not in themselves controlled airspace.

Ah, that's where I made my mistake - thinking that it's controlled
airspace (as in Class B). I just remember my instructor telling me to
always participate when flying into a TRSA, but never really
understanding why it was voluntary in the first place. Thanks for all
the replies everyone!

--
Guy

"Guy Elden Jr" wrote in message
oups.com...

Ah, that's where I made my mistake - thinking that it's controlled
airspace (as in Class B). I just remember my instructor telling me to
always participate when flying into a TRSA, but never really
understanding why it was voluntary in the first place.


If it was not voluntary it would have the properties of Class B airspace.

Guy Elden Jr wrote:

Ah, that's where I made my mistake - thinking that it's controlled
airspace (as in Class B).

So here's a followup question: We know the TRSA space coexists with the
class E airspace. Does it also coexist with the class D airspace "in" the
TRSA airspace? Or are TRSA and class D mutually exclusive?

Does the answer to this question make any practical difference?

- Andrew

"Andrew Gideon" wrote in message
online.com...

So here's a followup question: We know the TRSA space coexists with the
class E airspace. Does it also coexist with the class D airspace "in" the
TRSA airspace?


Yes.



Or are TRSA and class D mutually exclusive?


No.



Does the answer to this question make any practical difference?


Difference with what?

Steven P. McNicoll wrote:
"Guy Elden Jr" wrote in message
oups.com...

Something I've always wondered... why do TRSAs even exist?



Good question. Nobody seems to know the answer.

Plain language: Because they do not have the trafic load required to be
Class C but much more traffic than what is being loaded into the class D
airports. AIM language: TRSA do not meet the ARSA criteria for
conversion to a Part-71 defined airspace. These criteria are relatively
stingent.




Seems like a dangerous proposition to choose some airports as having the
concept of a voluntary controlled airspace?



What seems dangerous about it? TRSAs exist in Class D and Class E airspace
but are not in themselves controlled airspace.
It is a place to get flight following and approach control



Why not a Class C (their closest
cousin as far as I can tell)?

See above



Part of the Airport Radar Service Area (ARSA) plan was to eventually replace
all TRSAs with ARSAs, which are nor Class C airspace. But not all TRSAs met
ARSA requirements.

True




--
--------------------
Scott F. Migaldi
CP-ASEL-IA
MI-150972

Join the PADI Instructor Yahoo Group
http://groups.yahoo.com/group/PADI-Instructors/

--------------------

"Scott Migaldi" wrote in message
...

Plain language: Because they do not have the trafic load required to be
Class C but much more traffic than what is being loaded into the class D
airports.


Do they? How does the traffic count at airports with Class D airspace and
TRSAs compare with the traffic count at Class D airports with TRACONs that
do not have TRSAs?

"Scott Migaldi" wrote in message
...

Plain language: Because they do not have the trafic load required to be
Class C but much more traffic than what is being loaded into the class D
airports.

Has nothing to do with traffic levels. We were a TRSA here at BIL and
went right into class C when that all happened across the country. A
very few just stayed TRSA's. Class D is never an option for a facility
with a radar approach control.