"Xu Xian?" When this name entered the area controller's ears, he was stunned, and his anger was instantly dissipated. However, when he saw the weather range on the radar screen, he still insisted on himself.

Opinion: "If you maintain the track now, you still need to fly more than 120 nautical miles to completely cross the weather. If the track is 200, you only need to fly less than 50 nautical miles. How big is the difference?"

"Fifty nautical miles?" In the cockpit, the captain couldn't help but distinguish the direction on the navigation page, and at the same time combined with the weather radar to evaluate the flight possibility of track 200.

To be honest, if you fly according to the track 200 given by the area control, it is indeed a good choice. Not to mention that the distance you have to travel is only fifty nautical miles, which is not much in a typhoon area that often reaches hundreds of nautical miles.

Far away. He carefully studied the weather radar display and found that most of the area passed by track 200 was a mixture of green and yellow shades, with a small amount of red danger areas. However, it could be avoided by small-scale maneuvers by the aircraft.

open, so those areas shown in red are not particularly affected.

Generally speaking, the route given by the regional control is a pretty good choice in terms of travel distance and weather intensity in the area it passes through.

"Brother Xu, let's?" The captain's opinion was to accept the command of the area control. This is indeed a pretty good plan to travel through. Moreover, due to the limited detection range of the airborne weather radar, they were unable to see the entire typhoon area.

This is a very big limitation when making a flight plan. Therefore, the captain tends to accept the controller's command.

However, Xu Xian just glanced at him coldly: "Who is the person who put the plane into the dangerous situation it is today? Who should bear this responsibility? If you understand this, then please shut up!"

The captain trembled slightly, yes, who let the plane accidentally fall into a typhoon? So that it caused the current situation that requires difficult choices?

That’s right, it’s him! He’s the responsible captain!

Radar shadow, or radar blind spot! As the captain, he did not consider the possibility of radar shadow, but insisted on believing that the weather-free area displayed by the weather radar was safe.

The reason why there are shadows or blind spots that cannot be detected by weather radar involves the working principle of weather radar.

How does the airborne weather radar on an airplane detect the weather? It relies on detecting the intensity of water droplets! The weather radar emits pulsed radio frequency signals and obtains a display image based on the reflectivity of the water droplets.

Since under the same circumstances, water droplets have the strongest reflective ability, weather radar is more sensitive to all water-containing weather phenomena. On the contrary, objects such as ice crystals do not have strong reflective capabilities, so weather radar is less sensitive to ice crystals, dry hail and dry snow.

The effect is not very good. As for clouds, fog, wind or clear sky turbulence and lightning that do not contain obvious water droplets, weather radar has no ability to detect them at all.

However, most dangerous weather is accompanied by cumulonimbus clouds, so in most cases, weather radar can still ensure flight safety even if it is not effective for certain specific weather phenomena.

The only thing that is more difficult to solve is clear-sky turbulence. Clear-sky turbulence can exist independently and can occur without any warning. For many turbulence-injurious incidents, many are not caused by passing through cumulonimbus clouds, but are caused by cumulonimbus clouds.

Caused by encountering turbulence in clear skies.

At an altitude of 10,000 meters, there are no clouds in the sky, but even in such weather conditions, severe turbulence can occur without warning. It is this suddenness that is most likely to cause serious consequences of turbulence.

But even so, with the functions of current weather radar, it is still quite reliable, except for the existence of radar shadow.

The essence of radar shadow is that the radio frequency energy signal emitted by the weather radar cannot pass through the area of ​​heavy precipitation. In this case, the weather radar will naturally be unable to detect a certain area.

This situation is unavoidable for the time being, because even though weather radars are constantly being updated, their essence has not changed significantly. Detection is still accomplished through the reflection of radio frequency signals emitted by weather radars. Under such a background, radio frequency signals cannot pass through heavy precipitation.

The radar shadow caused by the area is inevitable.

Since the radar shadow area is often accompanied by extremely severe precipitation, and the weather intensity is unknown, this area is very dangerous. However, since the existence of the radar shadow cannot be avoided, some means should be used to warn pilots of the radar shadow.

Exists. Under this demand, the radar shadow warning function came into being, also known as the PAC function.

When the detection range of the weather radar is set within 80 nautical miles, a yellow arc will be generated on the periphery of the area where the radar shadow exists to remind pilots that this area is the radar shadow and should not be entered.

However, this time, because the typhoon area was too large, the captain and co-pilot set the weather radar detection ranges to be relatively large, one at 160 nautical miles, and the other at 320 nautical miles, and they never

Changed. It was precisely because of this outrageous use of radar that the crew never noticed the radar shadow warning.

The strange so-called "safe area" that the captain and co-pilot saw before was actually not a safe area, but the radar shadow, where the real danger lay.

The two crew members mistook the dangerous area of ​​​​the radar shadow as safe, which is simply the most ridiculous thing in the world. Here, the captain must bear most of the responsibility.

Because of this, when Xu Xian questioned the captain's professionalism, the captain was unable to refute, and he had no reason to refute. After all, he was the initiator of everything. It was his wrong decision that put the entire plane in jeopardy.

Dangerous situation.

Seeing that the captain still had some sense of shame, Xu Xian withdrew his gaze and directly confirmed his decision again: "Letour 5...641, track 200...we cannot accept it, apply to maintain track

!”

"Damn it! Don't you understand? If you keep the track, you are flying towards the eye of the typhoon. I have confirmed that there is no large dangerous area on track 200 that cannot be avoided. Why can't you accept it? You

So what if it's Xu Xian, can't you make mistakes? The person who ran off the runway before was not you, do you think you are always right?" This regional controller is also a young man, full of blood, and he doesn't care who is talking to him

Who is Xu Xian? Xu Xian is always right, and they must obey all his instructions unconditionally?

He is a controller and a part of ensuring flight safety. He is also responsible for the passengers on the plane. He is not Xu Xian's servant. He will do whatever Xu Xian says. At least so far, he does not feel that he is

Are there any problems with the crossing plan given? Or, in other words, he cannot understand Xu Xian’s intention of maintaining the track? Isn’t this heading towards the center of the typhoon?

He would not have any scruples about Xu Xian's identity. Since he felt there was something wrong with what Xu Xian said, he had to raise it.

However, the way or the language used by this young and energetic controller to express his insistence was indeed a bit extreme.

When the controller mentioned the incident of overrunning the runway, Xu Xian's face turned completely gloomy. This was undoubtedly exposing his scars. Although the controller did not characterize the incident as Xu Xian's responsibility for the incident, Xu Xian's face turned cold.

As long as the truth is not revealed for a day, people will be more inclined to assign the responsibility to Xu Xian. After all, compared to the vague and unknown possibilities, Xu Xian, a living person, is easier to bear responsibility and more convenient for people to vent.

This kind of unconscious behavior is not uncommon even in civil aviation circles.

At this moment, the co-pilot in the left seat and the observer position behind could feel the temperature in the cockpit suddenly falling into an ice cellar, which was so cold that the body could feel it.

The captain and co-pilot were silent for a while.

"Don't you think about the movement of the typhoon? Do you think the typhoon will stay still and will not develop?" Xu Xian did not respond to the controller's presumptuous remarks about the typhoon running off the runway.

In response to any counterattack, his emotions were like the mirror water. After a brief fluctuation, he regained his calmness, which was so calm that it made people feel scared: "If you think that the crossing plan that is close enough is the best plan, if you can,

Please shut up too!"

"Typhoon movement?" The controller was shocked and almost unsteady on his feet. He changed the console, pressed a few times on the keyboard, and then started to generate the expected movement route of the typhoon on another screen. The controller was watching

After seeing the expected movement path of the typhoon, uncontrollable shock overflowed from his pupils: "How is it possible?"

According to the predicted movement path of the typhoon, the typhoon will first turn to the southwest, and then turn to the east. This prediction data comes from the meteorological department and is of great reference.

If everything really develops like the typhoon prediction path given by the meteorological department, then the typhoon is now moving in the southwest, which is roughly the same direction as the track 200. Moreover, the typhoon itself is also developing now, that is to say

Its scope of influence is growing.

what does that mean?

If Lotto's plane really flies in the direction of track 200, the plane will not only have to overcome the speed of the typhoon, but also take into account the speed of the typhoon itself. Now it seems that the plane only needs to fly about fifty nautical miles to escape the weather area.

, but if we really want to fly there, it will definitely be much, much farther than fifty nautical miles!

"How do you know the movement path of the typhoon? It is impossible to judge the overall movement path of the typhoon just through high-altitude winds." The controller almost went crazy. He could not imagine how Xu Xian knew the predicted movement path of the typhoon.

If it is a relatively independent or small-scale weather system, by observing high-altitude winds, we can roughly guess the movement trajectory of this weather system. However, the scale of the typhoon system is too large, and the high-altitude winds inside it are affected by many factors.

, its wind direction reference for high-altitude winds is not that great.

However, if it were not through high-altitude winds, how could the crew in the cockpit know the movement path of the typhoon?

On the radio, the area controller's voice was full of disbelief, and he wanted answers.

At this moment, there was an extra person beside the controller, who was the shift supervisor who had left slightly. The shift supervisor pushed the controller: "What's wrong?"

The area controller was shocked: "Director!"

At this moment, Xu Xian's voice came: "Can we maintain the track, Letu 5641?"

Xu Xian ignored the controller's question, but as soon as Xu Xian's voice sounded, the shift director frowned: "Xu Xian?"

The director of the Huacheng Regional Control Office and Chen Yuan, the director of the Rongfu Regional Control Office, are good friends. In the dangerous goods leak incident, Xu Xian was commanded by Chen Yuan, the director of the Rongfu Regional Control Office. Chen Yuan often talked about the incident.

Bian, talking about it with relish. Influenced by his friend Chen Yuan, the director of the Huacheng Regional Control Office had a natural concern for Xu Xian and was familiar with his voice. The moment Xu Xian's voice came out of the speaker,

He figured it out.

The area controller explained the situation to the supervisor on duty in extremely concise words, including Xu Xian’s reasons for rejecting the route 200 crossing plan.

"Maintain track?" At this time, the supervisor on duty who roughly understood the situation answered the call: "Loto 5641, what is your intention to maintain track?"

He did not ask why Xu Xian was in the cockpit. According to regulations, Xu Xian should have suspended commercial operations now. However, such a person who has been isolated from civil aviation appeared on the radio. Isn't it an abnormal situation? But

The supervisor on duty didn't even ask.

The shift director's perception of Xu Xian is different from the controller's perception of Xu Xian. Perhaps it was influenced by his friend Chen Yuan, or maybe he just felt that way. Subconsciously, the shift director felt that Xu Xian was the omnipotent one.

God is omniscient, just do what He says.

However, Xu Xian's decision to maintain the track was really puzzling. No matter how much he trusted Xu Xian, he still needed to find out why.

In the cockpit, Xu Xian pressed the talk button: "Keep track... of course to reach the center of the typhoon!"

"Typhoon center? Aren't we almost at the typhoon center?" the captain asked in surprise.

Xu Xian glanced at the captain: "Why do you feel that the plane is in the center of the typhoon now? Is it because the turbulence is weaker now than before? Don't you know that the real center of the typhoon can even be close to calm wind? Is it calm wind now? It's just calm wind now.

It is the junction between the typhoon periphery and the center point."

"This..." The captain was speechless for a moment. He only roughly knew that the center of the typhoon was calmer than the periphery of the typhoon, but he didn't really know the specific details.

In front of Xu Xian, he seemed like an idiot. He didn't understand why Xu Xian seemed to know everything.

"You are going to the center of the typhoon, are you sure you can get through?" the supervisor on duty asked. He probably understood Xu Xian's intention of going to the eye area of ​​the typhoon, but the key was how to get there.

Xu Xianzhi had already thought: "This typhoon is still in the development stage. The vertical height of the cloud wall area is only ten kilometers. We should be able to go around it. So if we want to travel to the eye area of ​​the typhoon, we only need to pass through

The last layer of spiral rainband area. Although the last layer of spiral rainband area may be very strong, it should only last for a short time. At least I think it is much safer than flying on the outer edge of a typhoon for a long time.

.”
To be continued...