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#1
October 13th 06, 08:40 PM
posted to rec.aviation.soaring
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PCAS - Portable Collision Avoidance System
Ramy wrote:
wrote: PCAS - Portable Collision Avoidance System http://www.zaonflight.com/mrx.html If you think that an airliner in going to spot you just because you have a transponder, is a very false security. I fly a Boeing jet for a living and at times it is very hard to see another jet that ATC and TCAS alerted us to. But doesn't TCAS gives you resolution without the need to spot the threat? I was under the impression that it does. Only if the threat is also equipped with TCAS... Marc 
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#2
October 13th 06, 10:08 PM
posted to rec.aviation.soaring
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PCAS - Portable Collision Avoidance System
That is NOT correct. TCAS was specifically designed to provide evasive
maneuver info for airliners that are on a collision course with GA aircraft. However, the GA aircraft needs a Mode C Transponder (and it needs to be turned on). Mike Schumann "Marc Ramsey" wrote in message ... Ramy wrote: wrote: PCAS - Portable Collision Avoidance System http://www.zaonflight.com/mrx.html If you think that an airliner in going to spot you just because you have a transponder, is a very false security. I fly a Boeing jet for a living and at times it is very hard to see another jet that ATC and TCAS alerted us to. But doesn't TCAS gives you resolution without the need to spot the threat? I was under the impression that it does. Only if the threat is also equipped with TCAS... Marc
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#3
October 13th 06, 10:24 PM
posted to rec.aviation.soaring
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PCAS - Portable Collision Avoidance System
Mike Schumann wrote:
That is NOT correct. TCAS was specifically designed to provide evasive maneuver info for airliners that are on a collision course with GA aircraft. However, the GA aircraft needs a Mode C Transponder (and it needs to be turned on). You are correct, I was confusing limitations of TCAS I with TCAS II... Marc
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#4
October 14th 06, 05:41 PM
posted to rec.aviation.soaring
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PCAS - Portable Collision Avoidance System
Marc Ramsey wrote:
But doesn't TCAS gives you resolution without the need to spot the threat? I was under the impression that it does. Only if the threat is also equipped with TCAS... Marc A TCAS equipped aircraft with be given a resolution advisory for a threat aircraft that has a mode C or Mode S transponder. The threat aircraft does not need to have TCAS, and does not need to be interrogated by an ATC radar site. When both involved aircraft have TCAS the avoidance maneuver is agreed between them. If only one has TCAS it decides what to do on it's own. Andy
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