AviationBanter - View Single Post - Any pireps for PCAS MRX collision avoidance system?

**Eric Greenwell** · July 1st 07, 10:18 PM posted to rec.aviation.piloting,rec.aviation.soaring

wrote:

Advisory is a two-beep warning that something is nearby and within my
preset altitude and distance criteria. Alert is a four-beep sound that
means the traffic is even closer.

I'm also using an MRX. I believe it's warnings are also based distance
and altitude trends, not just distance and altitude. For example,
consider two aircraft the same distance from you and the same altitude
above, one descending and one ascending. Only the descending one will
trigger the alert signal.

In practice, I've found another glider can fly close to me going in the
same direction and not trigger the alert, but a more distant glider
coming at me will trigger the alert. Similar response when thermalling:
if we are both ascending at the same rate, no alert; if the lower glider
begins to gain on the higher glider, an alert may occur.

This more sophisticated threat determination seems to make it work well
in the traffic pattern when there are other aircraft around. My
experience in busy patterns is limited, however.

--
Eric Greenwell - Washington State, USA
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