The aircraft carrier has been launched into the water, and you still call it a toy?

Chapter 144
"According to the time when the unmanned submarine captured the nuclear submarine, we retrieved the sonar array monitoring data on the first hanging chain!"

"I didn't find anything unusual!"

"This shows what!?"

Submarine expert Dr. Gray looked at the surrounding people and said.

This shows what?
The noise of this new nuclear submarine can no longer be captured by their sonar system! !
If we talk about the advantages mentioned before, they are still within the tolerable range.

Then this last point is absolutely unacceptable!

Lower noise levels than sea wolves!
That's already lower than ocean noise!
in other words.

That is Daxia's nuclear submarine, which can come and go freely in the sea!
They couldn't find the submarine at all!

Is there anything more terrifying than being touched at the door of my own house? ?

You must know that this is under the monitoring of heavy sonar arrays!

In the past, all underwater submarine activities in Daxia could not escape the monitoring of the sonar array!

However, there was no indication of the whereabouts of this new submarine in the detection at that time!

There are various indications.

This nuclear submarine, which has never been seen before, has an unimaginable silent noise reduction technology!
In theory, the sonar system can detect targets below 90 decibels.

But there is a prerequisite here.

That is to determine almost in advance that there is a target active in a certain suspected area.

The underwater monitoring array and the anti-submarine patrol aircraft are cross-monitored to determine the position, speed, displacement, level, and attitude of the underwater target, as well as the ripple characteristics of the wake.

This information will be processed by the computer and then imported into the guidance system of the torpedo. The accuracy of this information determines whether the torpedo can hit the target.

It is not impossible to achieve this level.

Build an underwater monitoring network all over the ocean, unmanned submersibles!

But in this world, even all the countries combined cannot do this!
Not to mention America herself.

Therefore, in terms of current underwater detection technology.

The silence technology of Daxia's new submarine is almost unsolvable! !

Compared to the Kilo class.

This is the real 'ocean black hole'! !
Under the explanation of this submarine expert.

Everyone also knew what kind of sky-defying nuclear submarine was in the photo!

All of a sudden, whether it was the experts or the administrators, big or small, everyone fell silent!

These self-proclaimed technology is in the hands of civilization.

Once again, I realized what it means to be sad and helpless!

When did you suffer this kind of grievance!

Ok……

Before this year, I had never been wronged like this.

But from a few months ago.

This is happening more and more!

Daxia seems to have entered a state similar to a technological explosion!

Endless black technologies appear one after another!

Almost numb them already! !
...The following underwater monitoring system information will be completed after review

In anti-submarine warfare, detecting and identifying targets is the primary task.

Even with the continuous improvement of modern technological submarine search methods, acoustic sensors are mainly used to detect underwater targets.

Sonar detection can be divided into passive detection and active detection. Passive sonar uses sensitive hydrophones and precise signal processors to listen to the sound in the water to complete the detection, and it is not easy for the enemy to detect our presence.

Therefore, the deployment of hydrophone arrays on the seabed can not only provide relevant sea area hydrological data and establish a voiceprint database, but also achieve early underwater early warning and improve the effect of anti-submarine warfare.

At the end of the second dip, Hans designed the world's first XXI-class submarine that operates completely underwater. This submarine is quite different from the submarines that used to attack or evade surface ships before diving.

At that time, Hans introduced the snorkel newly developed by the windmill, and used the snorkel with a small radar reflection cross section to implement underwater charging during the voyage, reducing the chance of the submarine being exposed on the water surface, and making the anti-submarine patrol aircraft of the America Navy more likely to search for submarines. Reduced, leading to poor anti-submarine warfare effect.

After the second dip, Da Mao obtained XXI-class submarine technology, coupled with scientific and technological progress such as the advent of nuclear power devices, prompting Da Mao to vigorously develop nuclear submarines.

In order to prevent Da Mao from using nuclear submarines to carry out strike operations, America began to deploy underwater listening device arrays in the North Atlantic Basin, and used the name underwater monitoring system for the first time.

In the early days (50s), the Office of Naval Research in America fought against the new submarines of Da Mao.

Carry out a project assuming that Da Mao has 200 to 300 XXI-class submarines, use nuclear weapons and a large number of mines to counter US ships and blockade ports, discuss future anti-submarine warfare needs, and propose the development of underwater monitoring systems and advanced low-frequency analysis systems.

The Bell Telephone Company was commissioned by the America Navy to conduct a research experiment. For the first time, a 1000Y-foot-long 40 hydrophone array was used and deployed in the surrounding area of ​​Eleuthera Island, which belongs to the Bahamas (depth 1440Y feet).

Detect the noise signal of the American submarine, transmit it to the shore-based naval equipment station through the underwater cable, and use the low-frequency analysis and recording system to analyze the frequency information of the submarine. lower noise frequency.

After entering the deployment phase, America continued to improve the system's capabilities, mainly for submarine long-range detection and identification capabilities, and deployed to America's west coast and Hawaii;
In addition, America found that more and more big hairy submarines entered the North Atlantic Ocean from the North Sea and the Norwegian Sea. America began to deploy underwater monitoring systems in Greenland, Iceland and the United Kingdom to monitor big hairy submarines.

Because this monitoring area is located in the strait between Greenland, Cold Island (and the United Kingdom), it is named "GIUK Gap".

In 60, the S0SUS system joined the naval combat sequence, and America began to use the system to obtain early warning against the threat of the Damao submarine, and then notified the shore-based anti-submarine patrol aircraft to carry out anti-submarine operations, and then tracked and mastered it by the nuclear submarine to realize the long-distance detection of the Damao submarine The blockade reduces the possibility of retaliatory attacks by nuclear submarines on America's mainland.

In the early days of the S0SUS system, due to the limited cable length and signal transmission distance, equipment stations had to be widely deployed in coastal areas. In the 1970s, the America Navy had more than 20 equipment stations on the Atlantic and Pacific coasts;

In the 1980s, due to the influence of underwater environmental factors in the seawater mixed layer (such as underwater topography, hydrology, marine life, etc.), full coverage could not be achieved.

The America Navy has developed and built a marine surveillance ship equipped with a towed array sonar system.

Its towed array sonar has a length of more than 8000 feet to improve underwater detection.

In 85, the America Navy established the Integrated Underwater Surveillance System Unit, which consisted of underwater monitoring systems and marine surveillance ships.At its peak, the unit had 11 equipment stations and 14 surveillance ships.

To this day, the US Navy maintains multiple SOSUS systems for underwater surveillance, managed by the Integrated Underwater Surveillance System (IUSS). The sound signal data and related data are transmitted to the Naval Ocean Processing Facility (NOPF) for analysis.

At present, the America IUSS still maintains three fixed stations in normal operation to support all array sonar data processing requirements on warships, integrate the Atlantic and Pacific underwater monitoring systems, and provide underwater acoustics to the anti-submarine warfare command and its troops. pattern data.

Maritime Systems Command Atlantic, Norfolk, Virginia, east of America, is the operational support center for the Navy's Integrated Underwater Surveillance System unit and is responsible for logistical and technical support of assets in service around the world, including five ocean surveillance vessels (equipped with towed arrays sonar system;
West Coast Wharton State, Whidbey Island Data Processing Agency is responsible for providing real-time, accurate acoustic data and assisting the America Department of Homeland Security.

Conduct continuous maritime surveillance.The Data Processing Facility in Denick, Virginia is responsible for underwater listening stations throughout the Atlantic, North Atlantic and Norwegian Seas in collaboration with the United Kingdom and is home to the US Navy's Integrated Underwater Surveillance Systems Command.

When the America's Navy's underwater monitoring system began to be developed, it was very interested in setting up underwater monitoring stations in the waters near Japan. In 57, an experimental station was established in the northwest of Hokkaido for testing. The monitoring array extended to the Soya Strait. The phase mainly monitors the activities of submarines of the Ohmo Pacific Fleet in and out of the Sea of ​​Japan, Vladivostok and Nakhodka.

In 80, America decided to deploy the SOSUS system in Japan’s Tsugaru Strait and Tsushima Strait. In 81, Japanese divers described seeing underwater monitoring systems in Tsugaru Strait, Okinawa, and Sapporo. Array cable. In 86, America proposed that the underwater monitoring array should extend from southern Japan to the Philippines and the Strait of Malacca, covering the coast of China and the South China Sea.

Since the Soya Strait, the Tsugaru Strait and the Tsushima Strait are three very important strategic passages for the submarines of the Ohmo Pacific Fleet to enter and leave the Pacific Ocean, if the United States and Japan can effectively blockade, most of the Ohmo submarines will be confined to the Sea of ​​Japan, and only a few submarines can Break through the strait for tactical action.

Considering the increasingly frequent activities of the Chinese submarine force, the U.S. military decided to update the fixed array to monitor the activities of Chinese submarines in the East China Sea and South China Sea.

In 05, the fishhook underwater defense line was launched, starting from Kagoshima in the southwest of Kyushu Island, Japan, along the Osumi Islands to Okinawa, to Miyako Island and Yonaguni Island in the south of the Ryukyu Islands, and to Balabac in the Philippines via Taiwan Island Islands, to Lombok in the eastern part of the Indonesian archipelago, and across the Sunda Strait between Java and Sumatra, and finally from northern Sumatra to the Andaman Islands.

In 14, Amei and Xiaobaga completed the laying of the new SOSUS system and set up observation stations in Aomori and Okinawa prefectures in Japan to enhance the underwater monitoring effect.

The primary goal of the Navy's anti-submarine warfare is to first detect submarines and grasp their positions. How to grasp submarines involves the issue of detection probability. J The use of P-8A anti-submarine patrol aircraft, S-70C anti-submarine helicopters and surface ships is all increasing the probability of detecting submarines. Although these means of detecting submarines can be maneuvered, they are all immediate and short-term means of detecting submarines; The probability of detecting submarines, in addition to increasing the strength of submarine detection troops, the number of platforms and the time of submarine detection operations.If a series of underwater monitoring systems can be deployed in important sea areas, the purpose of long-term monitoring can be achieved, and the probability of submarine detection can be significantly improved.

Comprehensive use of sea and air anti-submarine combat forces and underwater monitoring system to increase the probability of searching and attacking submarines
The P-8A anti-submarine patrol aircraft can quickly maneuver to anti-submarine threat areas to carry out anti-submarine patrol missions. The synthetic aperture radar it is equipped with can produce high-resolution images and can quickly detect sea conditions in a large area.During the sea-air joint anti-submarine operations, the SOSUS system detects suspicious targets, and the anti-submarine information will be notified to the shore-based anti-submarine aircraft squadron and surface anti-submarine mission ships, and then the anti-submarine aircraft will quickly maneuver to the submarine threat area, and after confirming the underwater target activity information, immediately Authorized anti-submarine mission ships can cooperate with P-8A anti-submarine patrol aircraft or ship-borne S-70C anti-submarine helicopters to attack submarines.

Submarine is to use the hydrophysical characteristics of the ocean to improve its concealment and carry out submarine operations.Therefore, the marine combat environment is critical to the combat effectiveness of naval surface ships and submarines.

The marine combat environment mainly includes the marine geographical environment, marine hydrological environment, marine meteorological environment, marine physical environment, marine hydroacoustic environment, marine electromagnetic environment, etc. The marine acoustic environment mainly includes the distribution characteristics of ocean sound velocity, ocean background noise, underwater acoustic signal Propagation characteristics, submarine reflection characteristics of underwater acoustic signals and ocean reverberation, etc.

América has long collected and sorted out the underwater audio data received from the underwater monitoring system by the shore-based hydroacoustic station and the hydrological data of the combat sea area, which can predict the underwater battlefield environment in real time, which is conducive to a clearer grasp of various types of anti-submarine aircraft and ships. Search and attack the potential situation, give full play to tactics.

From the analysis of the construction process of the America SOSUS system, if the system is to be effective, the following elements need to be considered: ①The water depth of the sea area must be deep enough, and the seabed should not be too flat. , to be able to collect long-distance sound waves. ②The sea should not be sediment-like, as sound waves are easily absorbed, and relevant information is not easy to collect. ③The most important thing is to deploy in important waterways or important active sea areas that submarines may pass through, so as to meet the military effect.

The advantage of the underwater monitoring system is that it has all-weather operation capability, and it can usually obtain the acoustic characteristic data of underwater targets in the surrounding sea area, submarine entry and exit routes, and early warning information in the deep sea, providing reference for the deployment of naval forces.

At the same time, it is possible to obtain acoustic characteristic data of marine organisms in the surrounding sea area, geological acoustic characteristic data such as submarine volcanoes and earthquakes, which are also the basis for successful anti-submarine warfare.

In wartime, it can perform long-distance detection and early warning and real-time hydrological analysis tasks, and combined with the comprehensive use of air, surface, and underwater anti-submarine forces, it can greatly improve the effectiveness of anti-submarine operations.Therefore, the establishment of underwater monitoring systems in important sea areas can effectively save the use of anti-submarine forces, which is more conducive to the flexibility of the deployment and use of anti-submarine forces, and can achieve the purpose of effective anti-submarine and sea control in important ports, waterways and surrounding sea areas.

(End of this chapter)