When the examination begins with the United States Regional passenger plane and the US Army Baze's Helicopter Helicopter, the issues raised about the role of the traffic signal and collision system (TCA).

The collision, which took place as a plane, approaches the National Airport near Washington in Washington, who sent two plane to the Bottomak River near Washington. Everyone, like a plane that included 60 passengers and four staff and three helicopters soldiers, were killed.

However, TCA technology is assumed that it is an effective tool to help prevent such accidents. Here is what we know about the system and what could do in this situation.

How does TCAs work?

Problems with high air clashes have led to the US Federal Aviation Association (FAA), TCA returns to 1981.

Watch | Warning. The video shows the moment of influence.

CCTV shoots capture Washington Area Plane, Helicopter Collision

The shoots from the CCTV camera, when the passenger plane collided and the US Army helicopter collided. Audio air traffic control, while immediately immediately the immediate consequences of the clash.

It is an air electronic system that operates on its own air traffic control (ATC) system and provides a collision avoidance protection for a wide range of aircraft types according to the FAA guide.

It is really considered the last resort, but it is included in other navigation shows of the plane and uses radio signals to explore nearby planes. It will then give visual cockroach and audio warnings that another aircraft can be dangerous.

“It simply shows that the traffic is in our location, there is a potential collision risk,” says the Total Aviation and Transport Institute of Transportation and Transportation Aircraft Shem Malmquist.

And in some situations, it will give guidelines for pilots how to avoid collisions, he said.

For example, if TCAs believe that the pilot should pay attention to other air traffic, it can say “traffic traffic,” said Malmquist.

But it can also give a “resolution advice” that may include the “Climb Rise” instructions, “Go down” or reduce vertical speed, explained Malmquist.

“It simply came to our notice then.” He said, “he said. He added that current technology only gives vertical paths of corrective action, that is, it will not lead the plane.

TCAs always send signals.

While TCAs show warnings, audio commands are automatically prohibited at the bottom of a certain height, said Malmquist.

He said that many warnings on the plane hinder certain stages of flight to prevent worst problems.

For example, such a fire warning will be prevented during the initial implementation, “the pilot does not try to do something when the air is safer,” he said.

The same goes for a large maneuver when you are at low height, near the ground.

“First of all, you can not go down, because it's on the ground there, and you are not fast enough, because there is no such pollution.

What role can TCAs have in DC incident?

Due to the low height of the two plane, when they collided, TCA probably did not give Audio warning at that moment, Malmquist said.

He said the pilot was probably not looking at the warning at that moment. Instead, they would be in the center of attention to the window and focus on the runway.

“Unlike someone, suddenly responded and dive into the ground or dragging the plane … and losing the control of the plane,” he said.

“I don't know that TCA was not useful at all, but they hinder warning and warning, particularly because the risk of other problems is higher than the risk of collision.”