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Chapter 1784 Anti-frogman system

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    The next day, on a yacht outside the port, Lin Rui and Lincoln were fully equipped.  They all wore expensive double-necked diving suits with bulletproof armor but no equipment, and they carried no weapons except a diving knife.  This is not an assault mission per se, just a highly covert infiltration mission.

    Lin Rui pressed the earphone and whispered, "Cobain, signal test."

    "Normal." Cobain tapped on the computer and said, "But there may be signal shielding inside the workshop. You have to adapt accordingly."

    "Understood." Lin Rui turned around and continued, "Actuary, how is Sergey doing now?"

    "He has already entered the outskirts of the factory and is mingling among the workers, queuing up to go to work. He looks really cool in his work clothes." Jiang An laughed in a low voice.

    Lin Rui nodded, "Okay, I'll leave this to you. Let's get off, Lincoln." He put on his mask and fell into the water.

    Lincoln swam over from the other side and made a gesture to him underwater.  Lin Rui replied with a gesture, and then the two of them each 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 held the propeller and dived forward like seals under the water.

    Because this factory and the large nuclear submarine base are basically integrated.  In particular, the nuclear submarines in the base are a symbol of the entire country's strategic nuclear power and have important military roles and strategic value.

    In wartime, it is a key target for the enemy to block, attack, destroy and control, and may face multiple attacks from land, sea and air at any time.  Therefore, it is necessary to guard against hard strikes from enemy precision-guided weapons, soft strikes from enemy electromagnetic interference, and sneak attacks from enemy special operations such as underwater frogmen and torpedoes.  Therefore, safety protection is an important consideration in the construction of this kind of submarine base.

    Whether a veteran like Lincoln can sneak in safely is not sure.  Because there are various ways to prevent frogman penetration in such places, and most of them are passive defenses, such as setting up anti-submarine nets or anti-frogman facilities. The most troublesome one is the anti-frogman sonar system.

    However, Lin Rui and others took this aspect into consideration when they made plans.  Both he and Lincoln were equipped with an advanced reconnaissance instrument.

    This instrument developed in the UK is a new type of underwater navigation and search system for frogs. It was originally used by frogmen to operate underwater and clear mines.  This new type of "frogman reconnaissance system" has high-frequency forward-looking sonar search capabilities, uses very accurate navigation technology and data recording equipment to assist mine countermeasures operations, and is especially suitable for operations in shallow coastal areas.

    It is carried by the frogman and operated manually.  The system also incorporates microprocessor technology that receives sensor data and measures and displays mission information.  All system functions are controlled by frogmen through a small tactical tablet that is waterproof below fifty meters.

    Under normal circumstances, in order to better destroy mines, using frogmen is a very good way of combat.  After the ship's anti-mine equipment discovers a mine or a mine-like weapon, frogmen can be used to further verify and eliminate it.  In addition, large-scale mine countermeasures equipment is not suitable for mine countermeasures operations in shallow coastal areas, but frogmen can use some simple mine countermeasures equipment to search for and eliminate mines.

    But Lin Rui and the others were used to detect the surrounding situation.  A dark blue cold light flashed on the underwater tactical tablet, showing the outline of the underwater object in front.  Lincoln made a gesture to Lin Rui. On his tablet, he discovered multiple sonar nodes set up in different waters and distances from the coastline. Most of these nodes were hidden on submarine reefs or at the entrance and exit of harbors.  Forming a complete underwater sonar defense chain.

    "Anti-frogman sonar system." Lin Rui's heart moved slightly.  But he is not worried. Russia is not very good at anti-frogman sonar.  In fact, the only reliable system in the world that can detect closed-breathing frogmen at long distances is the frogman detection sonar DDS system recently completed by Israel's DSIT Technology Company.

    The DDS system can maintain the lowest false alarm rate under strong ocean noise and aquatic life reverberation conditions, with an average of only about once a week.  This Russian sonar system may be miraculous for frogmen who are more noisy and use open breathing apparatus.  But for frogmen like Lin Rui and Lincoln who carry closed breathing devices, they are somewhat incapable.

    But even so, this means they have to give up underwater thrusters.  Because if they move forward with underwater propellers, they will be discovered almost 100% under the influence of the noise of the propellers.  Lin Rui and Lincoln turned off the propellers and threw them underwater.  Then it dives forward like a fish, trying to keep the movement as light as possible, and uses the swing of the flippers to propel forward slowly.Judging from the sonar nodes discovered by Lincoln, the Russian anti-frogman sonar monitoring is not very far away. As long as they can successfully swim forward for a distance of four to five hundred meters, they can escape from this sonar monitoring.  area.

    While Lin Rui and others were sneaking underwater, Sergey also encountered some trouble.  At the entrance to the factory, they not only have to swipe their cards to verify their identity, but also have to pass through the security gate.  This made Sergey a little unprepared, because the previous intelligence did not mention that there was a security gate set up outside the factory.

    Sergey lowered his head, pressed the earpiece and whispered, "Guys, I'm in trouble. Security checks have been added at the entrance of the factory, which have not been mentioned before. I don't have weapons on me, but the communication equipment is a problem.  Their security check requires everyone to hand over their mobile phones. If I am found out, I will probably be exposed. But I can't give up my communication device."

    "Don't be nervous, our communication equipment is similar to ordinary mobile phones. And they cannot be unlocked and viewed. It is difficult for non-professionals to spot the difference." Cobain whispered through the radio.  "If it doesn't work, just hand over the communicator and get it back when you have time."

    "No, the risk is too great." 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 looked at the inspection gate in the distance and replied in a low voice.  Then, he took off his communication headphones and continued to follow the team forward.

    "This is impossible, it's too dangerous. You must ask him to give up bringing the communicator in." Tefnut said to Jiang An anxiously.

    "Without a communicator, he won't be able to get in touch with Lin Rui and the others." Jiang An said solemnly, "He won't be able to coordinate operations, and he won't be able to accept the instructions we convey here."

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