In airspace like this, there is an option for ATC to provide separation services based on radar. For example, this is how ATC keeps airplanes apart when they are in clouds and can't see each other. They would have to take into account the stack up of tolerances allowed in altimeter, transponder, timing of the radar pings, and more, so it ends up being a pretty conservative spacing. That's great for safety, but can be less efficient than the pilots simply seeing and steering around the other plane. The latter is what's known as "visual separation" - literally using eyesight to keep the aircraft separated. |
No. It is normal for helicopters through that corridor to be in charge of keeping themselves out of the way of planes. Helicopters can maneuver much more easily than planes can. There may be situations where the ATC assigned to helicopter traffic might guide a helicopter through particularly busy traffic or direct them away from a potential conflict, but even in that situation, most of the time the ATC is going to do exactly what the one here did -- ask if the helicopter sees the plane in question, and great visual separation if requested because the helicopter will be better positioned to maneuver. But also this assumes the helicopters are following rules for that flight path, which requires them to stay at or below 200ft and to stick to the east side of the river. The helicopter violated both of those rules. No one knows why. |
No. Look at the radar mapping. Runway 1 line was way south of Winston bridge in a line. Airbuses and 737s Runway 3 planes, regional jets, swing East over Maryland a bit and then cut over the river by DCA on an angle to land. There was the CRJ on the slight left/east of the BH doing its runway 3 approach, 10s of seconds away. And then way south was the runway 1 plane queue, minutes away. |
Why did the ATC grant visual separation if the BH was flying 100 ft over maximum altitude? Doesn’t the radar show how high they are flying? |
All 3 of them in the Blackhawk didn’t know that runway 33 exists!?!? At an airport with only 3 runways!?! And they live 30 mins away!?! You’re fired! |
+1 Exactly! And it suggests that they know it was her fault. |
Sadly agree. This will stay classified. Like the Luigi Mangione case, we’ll never know WTF he was actually doing or thinking all 2024. We’ll just get the lawyer version now. |
Go around Hains point island again. Go over bolling military base instead of river. |
The CRJ was banking to the left so the helicopter was seeing the bottom of the plane where there are far fewer lights.
I think this is just a case of human error. They were looking at another plane, didn't see this one as it was coming from a different direction and flew into it. Human error is always a possible risk and that is why air spaces need to be as safe as possible and have as many contingencies as possible to account for human error and prevent tragedy. Which is usually what happens and is what happened the day before. The investigation won't necessarily be about assigning blame but what changes need to happen to prevent this happening again. |
+1 Exactly! And it suggests that they know it was her fault. |
Hey, I’m flying past two active runways a mere 400 meters from where my path is. I’ll watch my radar and 270 degree plexiglass cockpit for the perfect timing. Time for a show. |
It’s always the woman’s fault. Right? |
Then shut it down and show her 20 year track record. Put some peer side by sides there too. |
+1 |
I agree with the bolded and generally with the the idea that this is likely a case of human error for which we need to better insulate the system. However I disagree that we can know what the helicopter pilot saw or why they did what they did at this point. I know many people, including many fellow pilots, are eager to say that this was an understandable mistake based on visibility in that corridor at this time of night. I think it is important those perspectives are heard and accounted for -- that may indeed have been what happened. But we don't KNOW that's what happened. There are other factors here, including the helicopter's last minute maneuvers that brought it directly into collision with the airplane (veering SW and rising over 100 ft in altitude in a short period of time). To be clear, I do NOT think this is evidence that it was intentional. I just think it's weird and it's not explained by the speculation that the helicopter could not see the plane. If this were just a question of the helicopter not seeing the plane, presumably they would have maintained their current trajectory, right? The only direction they received from ATC was to go behind the plan, which even if they thought it was further away, "behind" a plane approaching either runway at National would mean moving to the east, not to the west. There are too many unanswered questions for us to conclude what happened based on the commentary of other helicopter pilots who have flown that route. Their input is very helpful but not a full answer. |