Originally Posted by
Clinton McKenzie
Just so I understand what you’re saying about the functionality, when you have a dozen targets all within a mile (nothing surprising about that), which of them are ‘called out’ for you, on the basis of what criteria and what is the format of the ‘call’?
Only traffic that is encroaching the “protected airspace” around you is aurally alerted. It’s rare to have more than one or two. At BK for example it’s usually choppers crossing over the top as you are on final or taking off that encroach. The volume of that changes depending on altitude/speed etc.
It’s hard to summarize the functionality of it. The hazard avoidance section of the pilots guide runs 50pages. If you want the prioritization hierarchy give that a read.
Suffice to say if you get an aural alert and a big yellow tennis ball appearing on your PFD you know exactly where to look and avoid.
It has been known to alert over the top of landing clearances so there’s some angst about that.
AFAIK I must be connected to an unswitched audio to stop people turning it off (intentionally or unintentionally)
that Alaskan midair where everyone was equipped was some kind of configuration or installation error like that on one of the aircraft.