"Yeah?"

The Chinese officer whose face has been hit by wind and rain for many years has looked vicissitudes and dark, his eyes are fixed on the remote passive sonar array display screen in the main control room, looking at a normal screen screen, with a serious face, taking a deep breath, and saying:

"John, I always feel something is wrong. The Washington DC arrived at the Busan Naval Base yesterday afternoon. Logically, there is no reason why the Chinese naval ships don't come and see it. After all, this is their favorite thing. Do you think it is necessary for us to start active sonar to detect the Jeju Strait?"

With the secret arrival of the USS Washington aircraft carrier at Busan Naval Base yesterday, many surrounding U.S. military bases have successively upgraded their combat readiness levels, and the same is true for Feiyang Island Ocean Data Research Station.

As the nominal civilian marine data research station, it is actually the first node in the northern western margin area of ​​the Pacific Ocean, the world's first global underwater surveillance body. It is specially arranged at the gateway of the Korean Strait, and it identifies and monitors large areas of water such as the Korean Strait, Huangbu waters and eastern waters, and provides early underwater warnings.

The entire underwater surveillance system consists of a shore-based long-range passive sonar array, an active sonar array installed on the west side of the Jeju Strait and a sea-surface sonar buoy. It has three large fiber transmission lines that are up to 50 kilometers long to connect to the research station, one main line and two spare lines, to maximize the information transmission efficiency and security of underwater communication.

The main recognition and monitoring performance is mainly composed of long-range passive sonar arrays and marine sonar buoys, and varies due to the target noise level. For giant cargo ships with navigation noise of 130 decibels, they can realize identification and monitoring up to 400 nautical miles away. The surface warships with normal navigation noise of about 120 decibels are about 150 nautical miles, while conventional powered submarines are within 40 nautical miles.

For nuclear-powered submarines with lower noise performance, the recognition and monitoring performance of the entire system will be reduced.

If the noise level of the nuclear submarine reaches the ocean background noise level, that is, about 90 decibels, a long-range passive sonar array cannot detect and identify it.

At this time, active sonar must be turned on to learn about the underwater situation and check whether there are nuclear submarines.

However, the timing of turning on active sonar is a huge problem.

Without early positioning and identification of remote passive sonars, continuously tracking targets, and obtaining orientation information, who knows when active sonars will detect underwater targets?

The two links of remote passive sonar and sonar buoy detection are early warnings, providing preliminary identification and positioning information, and high-precision active sonar is secondly. The data information provided by the former is required to achieve the expected effect of underwater monitoring.

After all, no navy in the world drives active sonar all day long, including the world's most wealthy and powerful navy.

"Sir, I don't think it's necessary. Our little baby has the voiceprint data of all surface ships of the Chinese Navy, as well as the voiceprint data of most conventional and nuclear-powered submarines, including the main nuclear submarines such as the 091, 092 and 093B2 improved models equipped by the Chinese Navy."

Holding the coffee cup that emits heat, he felt the heat emitted from the surface of the delicate porcelain cup with his right hand. He took a sip and the rich and mellow smell suddenly released, eliminating some sleepiness and alleviating physical fatigue. The monitor John enjoyed his favorite Nestle coffee beautifully, and then said to his serious-looking chief:

"I believe that as long as any of the above Chinese naval ships appear, our cute little baby will definitely find each other. This is the latest masterpiece of Bae Company, isn't it? Please rest assured, my commander... Of course, if you insist on turning on active sonar, I am also willing to serve your orders."

John didn't believe that the Chinese Navy could pass through his nose quietly.

If you want to go to Busan, South Korea, you must enter and exit the Korean Strait. Jeju Island is the gateway to the Korean Strait, and it is impossible for Chinese naval ships to bypass Jeju Island.

It is impossible whether it is a surface ship or a submarine.

Yes, it's impossible!

The confidence and confidence of the monitor John's courage to say this comes from the "Cat Bat" remote passive sonar that was just arranged last year, and from the manufacturer of this sonar - Bae Systems.

Bae Systems, the world's second-ranked military industry group, is a behemoth combined by British Aerospace and Marconi Electronic Systems, a terrifying military equipment research combination, with extremely high attainments in the fields of military electronics such as anti-submarine, space systems, C3I and C4I systems, and electronic systems.

In the field of anti-submarine, Bae is called second, and no one dares to be the first. It can be said to be the cornerstone of supporting the US Navy's anti-submarine capabilities.

Without the active and passive sonar and electronic systems provided by Bae Systems, the U.S. Navy's anti-submarine capabilities must be reduced by at least one level.

The new shore-based ‘Cat Bat’ long-range passive sonar equipped by Feiyang Island Ocean Data Research Station is produced by Bae Systems. It effectively detects surface targets at 200 nautical miles and underwater targets at 100 nautical miles. It can monitor and identify and track 20 units in real time.

Excellent quality and excellent performance.

A series of complete underwater monitoring equipment on Feiyang Island are all manufactured by Bae Systems.

"You're right, John... Maybe I'm too suspicious. After all, the Chinese Navy has always liked to send submarines for field reconnaissance. Do you want chocolate?"

Hearing John's words, the Chinese officer thought, nodded slightly to agree, and his concerns disappeared and he said slowly.

After the words came to a close, a simple piece of chocolate was taken out from his pocket, stuffed it into his mouth, chewed slowly, and the rich sweetness was emitted, mixed with a faint bitterness.

"No, just coffee... By the way, sir, I heard that you came from China before, so do you hate China? China has developed very rapidly over the years, and the economic field is about to tie the United States." White monitor John shook his head gently, looked at the screen next to him and found that there was no abnormal sonar signal. Then he picked up the quilt, put it to his mouth, and took a sip of sweet coffee.

"Hate? It's not annoying, nor is it like it. It's just a country that overestimates itself. I don't believe that China can surpass the United States, whether it's economic or military."

When the Chinese officer heard this, his face was natural and normal. While eating chocolate, he slowly said: "My grandfather was from Fuzhou Province, Huaxia. He was a big landlord at that time. He heard that he was going to be criticized by the other party, so he moved his family to the United States to settle down. I am now an American, not a Chinese."

"Is the big landlord... the type of Australian farmer?" The monitor John suddenly became curious when he heard this.

"Uh...I don't know, that's what my dad told me, maybe it's right."

The Chinese officer was stunned for a moment. When he encountered this problem for the first time, he was a little embarrassed and said helplessly: "Okay, don't chat anymore, focus on work."

"Yes! Please rest assured, my respected sir, with my monitor John, there is no fish that can swim quietly across the Jeju Strait." Monitor John, who looked serious and serious, put down his teacup, put on his headphones again, faced the screen in the main control room, and worked seriously.

Currently, the "Merry Hood" long-range passive sonar is in the first-level power mode. John wants to screen and identify surface ships that enter an effective detection distance of 200 nautical miles away, track and monitor, and check whether there are any Chinese Navy surface ships.

In addition, you must monitor the underwater situation.

Fortunately, the computer system of the "Merry Gun" remote passive sonar is very powerful. After obtaining the abnormal voiceprint data signal, it can immediately identify and match it. The 055 large destroyer, which the Chinese Navy is proud of, was first discovered by this system and made great contributions.

On the main screen, there are still dense white civilian ship markings, and no soundprint data signals of Chinese water surface ships were found. The underwater environment was blank, and it seemed extremely quiet and had no signal characteristics.

Everything is normal in the water.

...

Jeju Strait entrance.
Chapter completed!