In the morning, the entire island was bathed in endless light and looked particularly beautiful. The sea breeze came from the sea to the east, gently stroking the island that had just woken up from the night like a gentle woman.

"Report to the captain, the boat has arrived at the waters outside Jeju Island on time and passed through the Huangbu Sea. The Jeju Strait is ahead. The current diving depth is 52 meters, the speed is 18 knots, the car clock is moving forward two, and the navigation noise is 108 decibels."

Xu Guinian, the 093G attack nuclear submarine sailing quietly underwater, maintained a speed of 18 knots. In the command cabin, he obtained the latest navigation data and hydrological information. He lowered his voice and whispered to Lin Anlan, who was standing in the captain's position:

"The comprehensive passive sonar of the bow shows that there are twelve civilian cargo ships within a radius of 10 kilometers."

The voice is low and clear.

At present, the Jinling has arrived in a military-sensitive area near Jeju Island, South Korea. Various underwater monitoring equipment are arranged in the surrounding area. The 093G attack nuclear submarine strictly implements the principle of silence to avoid exposure.

In the main digital console with the highest authority for the entire boat, a high-precision electronic map around Jeju Island is presented. Lin Anlan obtained navigation information data from Xu Guinian, the official, and nodded gently, stared at the entire Jeju Island electronic map. He looked at the Jeju Strait that was about to enter. He simply thought about the selected route and gave the order:

"The value is more important, and the digital simulation system of boat-mounted terrain is activated, the terrain data of the Jeju Strait undersea valley is loaded, and the third undersea valley is selected, and the picture is fed back to the main screen."

"yes."

Hearing Lin Anlan's words, Xu Guinian, the official, looked serious and serious, conveyed the order: "The captain's order to start the digital simulation system of the boat terrain."

With the command conveying, the third shift operator in the command cabin, who served as the navigation combat position quickly tapped the button with both hands to activate the fourth-generation craft terrain digital simulation system jointly developed by the National University of Defense Technology and the Huaxia Marine Terrain Research Center, and then loaded the actual detection of the Jeju Strait undersea terrain data.

Ten hours have passed, and the crew has been replaced in the third shift.

In the main high-definition screen, the picture turns and presents a digital terrain simulation picture - around the 093G attack nuclear submarine that is sailing, presenting a submarine terrain environment composed of countless white lines. The surrounding submarine terrain is flat, just like a plain on the ground.

Directly ahead, about twenty kilometers away, the seabed terrain gradually changes, the terrain trend continues downward, and the seawater depth increases from 70 meters to 120 meters, becoming deeper and deeper.

The entire terrain looks like a huge crack.

This is the Jeju Strait.

Jeju Island, with a total area of ​​1,845 square kilometers in South Korea, is located at the junction of the Huangbe Sea and the eastern seas. It is located in the east, facing Japan, facing China to the west, the Northern Dynasties Peninsula, and overlooking the eastern seas and Okinawa to the south. It is nearby, one of the most important waterway hubs in the world, the Korean Strait.

This is an island with a very strategic advantage in geographical location. It guards China's ocean throat from the north, although South Korea and the US military have never officially announced the establishment of military facilities on Jeju Island.

In fact, the US military used Jeju Island as the frontier reconnaissance position and secretly arranged a series of air-sea reconnaissance and surveillance equipment on the island.

His navy also knew this.

Jeju Island is 452 kilometers away from Seoul, 240 kilometers away from Busan Naval Base, 1,200 kilometers away from Tokyo, Japan, 450 kilometers away from Chongming Island, 750 kilometers away from Okinawa, and only 1,125 kilometers away from the capital of China.

The importance of the entire island's geographical location can be seen by just a simple and direct set of geographical data.

"The car clock is maintained, the speed remains unchanged, and the passive sonar on the left and right sides is activated. The diving depth changes with the depth of the water. It awakens the pilots of the trained carrier-based aircraft and takes them to the command cabin." Lin Anlan looked up at the main screen, with a pair of dark and deep eyes as deep as the deep sea. He looked at the fourth-generation marina digital simulation system with an analog matching degree of up to 95.8%, and exuded an inexplicable light and issued a series of commands in an orderly manner.

The fourth generation of digital simulation system for boat-borne terrain, one of the cutting-edge technologies adopted by 093G, was developed by the National University of Defense Technology. The Huaxia Marine Terrain Research Center provides terrain detection data. Through digital simulation of the seabed terrain environment, the submarine navigation status and surrounding terrain environment are presented, greatly improving navigation safety and combat effectiveness, with the simulation matching degree as high as 95.8%.

This is an absolute combat power multiplier, with extremely high-precision underwater navigation system, which increases the comprehensive combat effectiveness of its own attack and combat nuclear weapons by at least 50%.

Thanks to this system, the Chinese Navy, which has touched all the terrain data of the Jeju Strait, is as easy and simple as passing through the Jeju Strait, and is no longer as difficult as before.

Of course, due to the insufficient actual terrain data, the entire system is currently only applicable to the Asia-Pacific region, the eastern and southern Pacific, Southeast Asia, the Bay of Bengal, and the Arabian Sea in the Middle East, and there are still huge data gaps.

The central Pacific, northern Pacific, eastern Pacific, surrounding Australia, as well as the famous Gulf of Mexico and the Caribbean Sea and other world marine areas are all blank and need time to fill it slowly.

Lin Anlan's order was quickly spread, and the third shift operators in the command cabin became busy. At the same time, a wake-up order was also passed to the trained carrier-based pilots who were resting and sleeping in the residential cabin.

"Buzz!"

Countless tiny white bubbles emerged from the ends of the seven-leaf tilted propeller blades that rotated at a low speed, and the deep sailing sound that melted into the sea water quickly dissipated.

The 'Jinling' 093G, which activated the digital simulation system of the boat, looks even more like a fish in water, like a ghost underwater, hiding in the noisy sea water noise around, heading towards the deep and dark seabed cracks ahead.

To the northwest of Jeju Island, Feiyang Island,

This is an island with an area of ​​about 0.5 square kilometers. It was used for tourism before 2001. Now, no tourists come to the island.

The entire island is strictly guarded and personnel exchanges are prohibited.

To the north of Feiyang Island, there is a marine data research station covering an area of ​​about one hectare. The research station faces the sea and has small ports and other facilities.

In the center of the research station, there is a three-story cement building.

"John, give it to you, your favorite Nestle Coffee in China. Do we have any data feedback on our little baby? Have you found the source of the Chinese Navy's ship's voiceprint?" In the main control room, a young Chinese officer with dark skin came over, with a tall figure, wearing a white US military uniform, and carrying the rank of lieutenant in the shoulders.
Chapter completed!