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Is FLARM helpful?
At 21:29 25 November 2015, jfitch wrote:
I am curious about your experience with the interface. Did you just have the BF display, or was the Flarm also displaying targets on a moving map? I have not had any Flarm warnings that would have saved a midair (3 years with it now). But I have always had Flarm targets displayed on the glide computer moving map, and so nearly always see them long before they could be considered a threat. Two times in those three years I have gotten an unexpected warning, though not close enough to require action to avoid collision. I use those events as a learning experience to see how I need to change my scans and operations, so that they do not happen again. From this I conclude that the situational awareness, far away from an potential conflict, is more valuable for preventing potential conflicts in the first place than the actual warning facility.=20 Countless times that Flarm has identified and displayed glider within a km of me that I had not seen and might never have seen. I have used only the 'butterfly' display. To be clear, of course I am seeing target alerts all the time. That is not a problem, and even occasionally interesting (such as when someone starts following). The problem is with false collision warnings. Many pilots appear to (and some of my pupils certainly do) find it almost impossible to resist turning away from the Flarm direction of the 'threat', before they have seen the target. That is dangerous, as I wrote in a post yesterday. And note that the Flarm direction is often significantly different from the true direction (occasionally diametrically opposite), as it is track-based, not heading- based. I can see that my experience of Flarm in a very busy environment (the French Alps) will be very different from that of those flying largely in isolation (such as flatlands, particularly with what I would regard as high cloudbases (I'm a Brit!)) J. |
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