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#1
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![]() "Peter Duniho" wrote in message ... They are left-over from when Class C airspace was called an ARSA. Actually, they're left over from an even earlier time. The main difference between an ARSA and a TRSA was that the former required participation, while the latter did not. Then, and now, the TRSA is sort of "in-between" Class C (mandatory radar services) and Class D (no radar services). TRSAs provide a service in-between Class C service and Basic Radar service. There are some terminal radar facilities that do not have Class B or Class C airspace and are not TRSAs, these facilities provide Basic Radar service. http://makeashorterlink.com/?R22812C3B The bottom line here is that TRSAs exist where there's a terminal radar facility (approach/departure control), but where there's not enough traffic to justify mandatory participation (as is the case for Class C, or Class B for that matter). But TRSAs do not exist at all such locations. Facilities that provide Basic Radar service are identified on sectional charts by a small blue circle with an R in it near the airport name. http://makeashorterlink.com/?F3E722C3B It's really just Class E airspace, where radar services are being provided by a terminal controller rather than a center (enroute) controller (that's a bit of an oversimplification too, but it's the basic idea). It's Class D and Class E airspace. The boundaries show you where the terminal controller provides the radar services rather than the center controller. The only difference in radar services is who is providing them; it's still just your run-of-the-mill Class E services, which are optional wherever you are. That's not correct. The charted TRSA boundary is well within the center/approach boundary. The terminal facility provides services on both sides of the TRSA boundary, probably by the same controller as well. |
#2
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Maybe I'm reading this wrong, but according to the AIM, TRSAs provide
separation between participating VFR aircraft. In class C airspace, there is only separation between VFR & IFR aircraft. The AIM makes it sound like TRSAs offer participating aircraft a higher level of separation services than class C radar services. "Steven P. McNicoll" wrote in message ink.net... "Peter Duniho" wrote in message ... They are left-over from when Class C airspace was called an ARSA. Actually, they're left over from an even earlier time. The main difference between an ARSA and a TRSA was that the former required participation, while the latter did not. Then, and now, the TRSA is sort of "in-between" Class C (mandatory radar services) and Class D (no radar services). TRSAs provide a service in-between Class C service and Basic Radar service. There are some terminal radar facilities that do not have Class B or Class C airspace and are not TRSAs, these facilities provide Basic Radar service. http://makeashorterlink.com/?R22812C3B The bottom line here is that TRSAs exist where there's a terminal radar facility (approach/departure control), but where there's not enough traffic to justify mandatory participation (as is the case for Class C, or Class B for that matter). But TRSAs do not exist at all such locations. Facilities that provide Basic Radar service are identified on sectional charts by a small blue circle with an R in it near the airport name. http://makeashorterlink.com/?F3E722C3B It's really just Class E airspace, where radar services are being provided by a terminal controller rather than a center (enroute) controller (that's a bit of an oversimplification too, but it's the basic idea). It's Class D and Class E airspace. The boundaries show you where the terminal controller provides the radar services rather than the center controller. The only difference in radar services is who is providing them; it's still just your run-of-the-mill Class E services, which are optional wherever you are. That's not correct. The charted TRSA boundary is well within the center/approach boundary. The terminal facility provides services on both sides of the TRSA boundary, probably by the same controller as well. |
#3
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![]() "Brad Zeigler" wrote in message ... Maybe I'm reading this wrong, but according to the AIM, TRSAs provide separation between participating VFR aircraft. In class C airspace, there is only separation between VFR & IFR aircraft. The AIM makes it sound like TRSAs offer participating aircraft a higher level of separation services than class C radar services. I suppose that depends on what you consider a higher level of separation services to be. In Class C airspace IFR aircraft are separated from all other aircraft, but in TRSAs they're only separated from other participating aircraft. |
#4
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"Steven P. McNicoll" wrote in message
ink.net... "Brad Zeigler" wrote in message ... Maybe I'm reading this wrong, but according to the AIM, TRSAs provide separation between participating VFR aircraft. In class C airspace, there is only separation between VFR & IFR aircraft. The AIM makes it sound like TRSAs offer participating aircraft a higher level of separation services than class C radar services. I suppose that depends on what you consider a higher level of separation services to be. In Class C airspace IFR aircraft are separated from all other aircraft, but in TRSAs they're only separated from other participating aircraft. True. I was thinking along the lines of VFR to VFR separation. Manditory participation in class C doesn't get you that...only Class B. It's interesting that TRSAs offer VFR to VFR separation, even if only for those who wish to play along. Perhaps this is an attribute of TRSAs that differentiate themselves from Class Ds with approach radar services. |
#5
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Brad Zeigler wrote:
"Steven P. McNicoll" wrote in message ink.net... "Brad Zeigler" wrote in message ... Maybe I'm reading this wrong, but according to the AIM, TRSAs provide separation between participating VFR aircraft. In class C airspace, there is only separation between VFR & IFR aircraft. The AIM makes it sound like TRSAs offer participating aircraft a higher level of separation services than class C radar services. I suppose that depends on what you consider a higher level of separation services to be. In Class C airspace IFR aircraft are separated from all other aircraft, but in TRSAs they're only separated from other participating aircraft. True. I was thinking along the lines of VFR to VFR separation. Manditory participation in class C doesn't get you that...only Class B. It's interesting that TRSAs offer VFR to VFR separation, even if only for those who wish to play along. Perhaps this is an attribute of TRSAs that differentiate themselves from Class Ds with approach radar services. The use of approach radar services at (at least some) airports in Class D with approach radar services (but no TRSA) is optional too. You can decline them if you so desire e.g. at KRDG, although tower will point you to the approach frequency if you don't explicitly decline it. At KRDG the approach position is actually in the tower cab anyway. Off peak, the same controller might be approach, tower, ground, and clearance delivery simultaneously. |
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