Chapter 1784: Anti-frogman system

The next day, on a yacht outside the harbor, Lin Rui and Lincoln were both equipped. They are all wearing expensive double-necked diving suits, but they are not equipped with bulletproof armor, and they have no weapons except for a weapon. This is not an assault mission in itself, but a highly concealed infiltration mission.
Lin Rui pressed the earphones and whispered, "Kebain, signal test."
"Normal." Cobain tapped the computer, "but maybe there will be signal shielding inside the workshop. You have to act accordingly."
"Understood." Lin Rui turned around and continued, "Actuarial, how is Sergey now?"
"He has already entered the outskirts of the factory and is mixing among the workers, queuing to go to work. His appearance in overalls is really good." Jiang An chuckled softly.
Lin Rui nodded, "Well, I'll leave it to you here. Lincoln, let's get down." He put on the mask and fell into the water.
Lincoln swam over from the other side and gestured to him underwater. Lin Rui replied to him with a gesture, and then the two took off a small underwater propeller for individual soldiers from the back of the yacht. This thruster is also the smallest and lowest noise thruster among the Russian frogman weapon systems.
The two people leaned on the propeller to swim forward like seals underwater.
Because this factory and the large nuclear submarine base are basically integrated. In particular, the nuclear submarine in the base is a symbol of the nation’s strategic nuclear power and has important military functions and strategic value.
In wartime, it is the enemy's key target of blockade, attack, destruction and control, and it may face multiple threats of land, sea, and air attacks at any time. Therefore, it is necessary to prevent both the hard strikes of the enemy's precision-guided weapons and the soft strikes of the enemy's electromagnetic interference, as well as the sneak attacks of the enemy's underwater frogmen and torpedoes. Therefore, safety protection is an important consideration in the construction of this submarine base.
Whether it can sneak in safely, even a veteran like Lincoln has no idea. Because the prevention of frogman penetration in such places is diverse, and most of them are passive defenses, such as setting up anti-submarine nets or anti-frogman facilities, the most troublesome thing is the anti-frogman sonar system.
However, when Lin Rui and others made plans, they took this into consideration. Both he and Lincoln were equipped with an advanced reconnaissance instrument.
This British-developed instrument is a new type of underwater navigation and search system for frogmen. It was originally used for frogmen to operate underwater and clear mines. This new type of "frogman reconnaissance system" has high-frequency forward-looking sonar search capabilities, using very accurate navigation technology and data recording equipment to assist mine countermeasures operations, especially very suitable for operations in shallow waters near the sea.
It is carried by a frogman and operated manually. The system also integrates a microprocessor technology that can receive sensor data and measure and display task information. All system functions are controlled by the frogman through a small tactical panel that is waterproof below 50 meters.
Under normal circumstances, in order to be able to better eliminate mines, using frogmen is a very good combat method. After the ship's anti-mine equipment finds mines or similar mine-like weapons, frogmen can be used to further verify and eliminate them. In addition, large-scale anti-mine equipment in the shallow waters near the sea is not suitable for anti-mine operations, while frogmen can use some simple anti-mine equipment to search for and eliminate mines.
But Lin Rui and the others used it to detect the surrounding situation. A dark blue cold light flashed on the underwater tactical plate, showing the outline of the underwater objects in front. Lincoln made a gesture to Lin Rui. On his tablet computer, he found multiple sonar nodes located in different waters and distances from the coastline. Most of these nodes were hidden in seabed reefs or harbor entrances and exits. It forms a complete underwater sonar defense chain.
"Anti-frogman sonar system." Lin Rui's heart moved slightly. But he is not worried that Russia is not very smart at anti-frogman sonar. In fact, the only reliable system in the world that can detect closed breathing frogmen from a long distance is Israel's dsit technology company, which has recently completed the frogman detection sonar dds system.
The dds system can maintain the lowest false alarm rate under strong ocean noise and aquatic reverberation conditions, with an average of only about once a week. Russia's sonar system may have a miraculous effect on frogmen who are more dynamic and use open breathing apparatus. But for frogmen like Lin Rui and Lincoln who carry closed breathing devices, they are somewhat inadequate.
But even so, it also means that they must give up underwater propellers. Because if the underwater propellers move forward, under the influence of the noise of the propellers, they will be found almost 100%. Lin Rui and Lincoln turned off the thrusters and dropped them underwater. Then dive forward like a fish, try to keep the movement as light as possible, and use the flippers to move forward slowly.
Judging from the sonar nodes discovered by Lincoln, the Russians’ anti-frogman sonar monitoring is not very far away. As long as they successfully dive forward for a distance of four to five hundred meters, they can escape the sonar monitoring. area.
While Lin Rui and the others were sneaking underwater, Sergey also had some trouble. At the entrance to the factory, they not only have to swipe their card to verify their identity, but they also have to go through the security gate. This made Sergey a little unprepared, because the previous intelligence did not mention the security gates outside the factory.
Sergey lowered his head and whispered while pressing his earphones, "Guys, I'm in trouble. There has been a security check at the entrance of the factory, which has not been mentioned before. I don't have weapons, but the communication equipment is a problem. Their security check requires everyone to hand over their mobile phones. If I was found out, it would be very likely to be exposed. But I can’t give up communication equipment.

"Don't be nervous, our communication equipment is similar to ordinary mobile phones. And they can't be unlocked and viewed. It is difficult for professionals to find the difference." Kobain said in a low voice via radio. "If it doesn't work, just hand over the communicator and take the time to get it back."
"No, this is too risky." Jiang An whispered. He whispered through the wireless channel, "Sergey, can you try to bring the communicator in without attracting attention?"
"I'll give it a try." Sergey replied in a low voice, looking at the inspection opening in the distance. Then, he took off the communication headset and continued to follow the team.
"It's impossible, it's too dangerous. You must make him give up carrying the communicator in." Tefnut said to Jiang An anxiously.
"Without the communicator, he would not be able to get in touch with Lin Rui and the others." Jiang An said solemnly, "He will not be able to cooperate in battle, nor will he be able to accept the instructions from us."