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From information on flightradar24’s article, the collision happened at around 300-400 ft. Those altitudes are too low for TCAS to issue alerts. The Black Hawk had a transponder broadcasting with mode S, so it would be visible to TCAS and the tower, but it was not broadcasting ADS-B, which would let you see it on most flight tracking websites.
The jet would have received an audible TCAS alert if this happened at a higher altitude.
the 7 and 8 are all codenamed after plants. Lavender, Violet, Ginko, Begonia, Williow and Biloba.
Half are trees. Most are better names for trans women than Begonia.
I kind of wonder what the worst possible flower to have as a name. I would say begonia. Very pretty flower, not so pretty of a word.
I AM MOVING FROM LEMMY.WORLD!!
It is my pleasure to announce that effective immediately, I am transitioning my account to lemmy.blahaj.zone! This has been a few months in the making, so my entire self is already onboard.
FAQ:
Why?
That’s a complicated question with a long answer! The primary reason is ideological similarities between me and Ada’s excellent team of admins. I am on good terms with Ada and her team, and have gotten her consent to do this.
How does this work?
Currently, as there is not an easy way to transfer an entire account (trust me, I checked), so I am logging out of the old account, and moving my focus to the hildegarde on lemmy.blahaj.zone. For you guys, functionally nothing has changed.
What about the posts?
Well, I tried to transfer them, but there was no real way to do so without absolutely destroying my brain’s sanity. For this reason, I am simply ignoring the old account. Everything is staying up. Direct messages are still enabled, but I’m not going to read them or anything.
TCAS is a transponder based system. Warnings are suppressed at low altitude by design, and city lights do not interfere with it.
Runways get changed all the time for many reasons. Every runway at washington national is in a different direction, it would be a different approach entirely and not a last minute change. There is no evidence that the plane flew the approach wrong. There is ADS-B data for the full flight. Anyone can check the plane’s actual flighpath.
Pilots can refuse ATC orders that are unsafe. The approach they were originally planning would have crossed the river and had the same risk of traffic.
The helicopter pilot seeing the wrong plane is a likely explanation. There were other planes in the area. The controller warned of the traffic. The pilot confirmed having the plane in sight.