Chapter 327 There is a big fish under the water

  Ships with a slightly larger displacement have a large protruding nose under the bow, just like a clown's nose. The technical name for this thing is a bulbous bow. It is used to reduce wave-making resistance and improve the navigation efficiency of ships.

Generally speaking, after installing a bulbous bow, if other conditions remain unchanged, it can reduce the ship's main engine propulsion power by 20% and achieve the same speed, which is significantly economical.

For warships, the bow also has this big nose, but it can not only reduce wave-making resistance, but also the most professional bulbous bow sonar can be installed in the big nose of the bow. It's the bow sonar.

No matter what kind of warship it is, even the modern class that Lao Maozi exists specifically for air defense and anti-ship, it also has this kind of equipment, which can provide the warship with the ability to detect underwater movements. Of course, a professional air defense ship like the No. 115 There will be no shortage of this equipment.

  Furthermore, since the 115 destroyer is currently the destroyer with the largest displacement in the country, its bulbous bow sonar is naturally the largest.

 For something like this, performance is directly proportional to size.

 If the technology is not advanced, then pile up more sonar arrays to increase perception through quantity.

In terms of performance, the previous Type 051 used the first-generation bow sonar. This Type 115 uses the same second-generation bow sonar as the Type 112, but the array is larger, and combined with the subsequent digitization processing system, its performance is far stronger than any domestic bow sonar.

At this time, a group of people had already rushed from the bow to the bridge. Although Wu Shengli was not young, his physical fitness was still good. He ran all the way without breathing. He looked at the sonar soldier calmly: "Unknown submarine? "

"Yes, we heard its movement just now when we were turning, which means that this unknown submarine is following us, but now, we have lost its sound."

When it comes to the performance of various sonar on warships, the sonar array towed by the stern is the most sensitive. Since it leaves the ship body, the impact of its own noise is reduced. This sonar array can detect farther distances and hear smaller sounds. the sound of.

If both types of sonar are available, many bow sonar even only have active functions, and passive detection relies entirely on towed sonar.

“Did you hear it wrong? Or is it a problem with our equipment itself?” a technician said.

“No, there is absolutely no way I heard it wrong!” said the sonar soldier: “I am the best sonar soldier in the entire fleet. I can hear even if someone drops a coin on the target!”

  Can you still hear whether the national emblem is above or below? Such a question came to Qin Tao's mind, but he did not ask it. The atmosphere at this time was definitely not suitable for such words.

"This shows that someone is very interested in our warship. After the warship went on trial, they followed behind us. After we slowed down and turned, because they did not operate in time, they appeared on our side. They were discovered by us." Wang Qing spoke: "But after a while, they turned into a silent state, making us mistakenly think that there was a problem with our equipment."

Wu Shengli nodded: "Yes, our territorial waters are definitely not a place where they can enter and exit at will! Contact the fleet immediately, take off the anti-submarine helicopter, and find the unknown submarine!"

 When he said these words, Wu Shengli's face was extremely serious.

 This is the territorial waters of the motherland, and a submarine of unknown nationality actually broke in. If it were a war, it would definitely suffer huge losses!

Although the other party's target was the shipyard, the naval base was nearby, and the naval base's underwater monitoring equipment did not detect the unidentified submarine. This was an absolute dereliction of duty!

"If the other party goes silent, our anti-submarine helicopters can't do anything." At this moment, Qin Tao spoke.

 What is the silent state of a submarine? It was this submarine that completely stopped making any noise, its engines stalled, and even the crew could not speak loudly to ensure that they did not make any sound. They were completely hidden in the quiet sea water, and some even sank directly to the bottom of the sea, just like a big stone. .

At this time, even if an anti-submarine helicopter comes over and drops various sonobuoys, it will be meaningless unless the other party starts to move again. At this time, the competition is who is more patient.

If it were normal times, Qin Tao would not have the say when warships carry out various military operations, but it is different now. This warship is now in a testing state. Theoretically, before it is delivered to the navy, the people at the shipyard have the say. Calculated.

 As for what Qin Tao said now, of course he had his own personal purpose.

“If we don’t use anti-submarine helicopters, what will we use?” Wu Shengli asked.

 Warship? At such a close distance, there is no need for military dispatch. If a warship comes over, it may cause greater interference. It is more convenient and faster to use a helicopter.

“Use the active mode of our bow sonar.” Qin Tao said: “This sonar also has terrain mapping capabilities. Even if the opponent sinks on the bottom of the sea, we can find it!”

“That’s right!” The technicians from the 715 Institute were excited: “Our sonar has this capability, now let them know how powerful we are!”

 In China, Institute 715 specializes in sonar research. They developed the sonar for the 112 warship. When Lao Maozi’s modern class was dismantled by Qin Tao, the sonar system was also brought back to research by Institute 715.

 Comprehensive various technologies, plus the larger size of the bow sonar of the 115th ship and the more advanced back-end processor, so this sonar has a variety of functions, including terrain mapping!

Aren’t they planning to be a big rock? Then let us find this big rock!

"This is the mouth of the river, and the water in the lower layer flows into the ocean." Wang Qing also agreed with Qin Tao's proposal: "If we use helicopters to drop passive sonar buoys, we may return without success. They By remaining silent and following the underwater currents, you can enter the depths of the sea.”

If the water below is still, then of course they can wait. It's a game of cat and mouse, even if it lasts for several days and nights, it's no problem. If the sea water below hits the continental shelf, that is, when the tide is high, then we can wait patiently and watch them be washed and stranded. But now, the ocean currents here flow to the depths of the ocean. If we don't act quickly, the opponent will take advantage of the navy to escape.

 So, they must take the initiative.

"Okay, then take the initiative to search!" Wu Shengli nodded. He has the highest position here, so of course he has to make the decision. However, he is definitely not the kind of stubborn person. He is good at listening to the opinions of his subordinates.

Moreover, he has never seen a warship's radar capable of terrain mapping. This time, it can open his eyes.

"Attention, left rudder three, adjust the direction to the position where the target disappears, and then turn on the active sonar, synthetic aperture mode!" Although this is the first time Wang Qing has commanded the 115th ship, and the first time he has issued the synthetic aperture mode, but here They had already conducted countless trainings before.

"yes!"

"clear!"

 People in all positions are busy.

The sailor in the engine room adjusted the engine to idle to minimize his own noise. The helmsman steered the warship. After aiming at the target and disappearing, the active sonar mode was activated.

 Bang, bang, bang!

Low-frequency sound is formed on the membrane of the sonar, and then spreads around along the sea water. Ripples suddenly appear underwater. The mechanic is paying attention to the power supply of the warship. At this time, with the sonar active mode Start up, the power supply is still very stable.

This kind of active sonar has a transmitting power of more than 100 kilowatts and a power consumption of more than 500 kilowatts. After all, the efficiency of converting electricity into sound is not high. However, this modern warship was deliberately designed to The margin of power supply is increased. According to Qin Tao's explanation, in addition to meeting the power needs of the huge S-300 weapon system, it must also facilitate future modifications.

Although it is a new warship, Qin Tao knows that the 051C is just an emergency replacement plan. When the Navy's Aegis warships continue to make dumplings, the two 051Cs will become increasingly embarrassed.

 Large-scale modifications are not cost-effective, and small-scale modifications are unnecessary. Put aside how to modify in the future, at least there must be sufficient power supply support.

 Now, other weapon systems have not shown their power, and the neglected bow active sonar has been used first.

Countless low-frequency sound waves were transmitted to the surrounding seawater, and then reflected back. Underwater graphics began to appear on the screen in front of the sonar soldier.

  The display speed of graphics is very slow, just like when the Internet speed is not strong and the image downloading is slow when viewing the web page, now the graphics only occupy a horizontal bar on the screen, but people who see it are already very excited.

 “The chart, this is exactly the same as our chart!”

“Yes, I really didn’t expect that our sonar has such ability!”

“The sonar on the ocean exploration ship has this ability. However, the sonar array is very large and covers the entire side of the ship. It is not easy for our bow sonar to be able to do this.”

 “Everyone keep quiet!”

The little sonar soldier spoke, so everyone no longer dared to speak for fear of disturbing the sonar soldier's operation. At this time, the sonar soldier is the most important!

The graphics are getting bigger. The second sonar wave goes out and reflects back, and there is one more graphic, then the third, the fourth... Finally, the screen is full.

“Sea No. 42, there is an unknown object in this trench!” the sonar soldier reported pointing to the graphic on the screen.

The other party was so cunning. After being discovered, he actually chose to hide in the trench! If it weren't for active sonar's mapping mode, there would be no way to find it!

This trench was also washed out by the river, so the opponent's submarine can slowly move outward along the trench and quietly leave the continental shelf.

 Cunning, so cunning!

“Okay, I found it indeed!” Wu Shengli said: “Now, give them a threat!”

“Understood!” Wang Qing shouted loudly: “Active sonar, attack mode, send me two sonar waves, scare these **** to death!”

Wang Qing’s orders were full of murderous intent.

 “Understood!” The sonar soldier was also very excited at this time.

If you use the passive monitoring mode, the other party will not know that it has been discovered. However, the other party is too cunning. After discovering that the warship on trial voyage immediately turned into a submarine search state, it immediately judged that it might have been discovered. After discovering it, I immediately chose silence, while looking for the trench, planning to slip away quietly.

　　Next, we used the surveying mode. In this mode, sonar waves are emitted in all directions. After reflecting back, they are received separately. Through computer calculations, we can know the topographic conditions of the seabed.

Now, in active attack mode, all sonar waves will be gathered together, and hundreds of kilowatts of sonar waves will propagate in the same direction!

 Is the sound for square dancing loud enough? It's only one hundred watts. The power of hundreds of kilowatts is equivalent to a thousand square dance speakers, aiming at the same place! Moreover, sound travels more powerfully in liquids than in gases.

 For any submariner, this will be a death sentence!

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 bang!

Two powerful sound waves left the ship's bow sonar. The seawater along the way was filled with waves, and even formed vortexes. The terrifying sonar waves moved forward quickly, heading straight for the submarine in the distance that was planning to abscond! (It’s an exaggeration, but it’s probably not that powerful in reality.)

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 bang!

If the sound directly hits the steel submarine shell, then it will be like ringing a bell. The people inside the submarine will cover their ears in pain and scream in an instant. However, this unknown nationality A thick layer of silencing tiles is laid on the outer shell of a submarine. This layer of silencing tiles absorbs part of the energy of sonar waves and also slows down the transmission of sound.

 However, even so, this sonar wave still brought terrible experiences to the sailors inside.

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 bang!

The terrifying sound passed through the hull of the boat and irritated their eardrums. At this time, they all covered their ears in pain. Some veterans could still remain calm, but a dozen novices could not suppress their inner fear and screamed. stand up.

 “Oh, **** it, shut them up!” the captain cursed.

“Captain, what should we do?”

The impact of this terrible active sonar wave is not only to scare people, it is like locking a target in a fighter confrontation. Now the detection of this active sonar wave is also calculating the attack data. At this time, the opponent The calculation and binding of torpedo data have been completed, and anti-submarine torpedoes can be launched at any time!

“They can’t do anything to us, they don’t have torpedoes!”

 The captain obviously refused to leave.

The 115 ship is a warship with uneven performance. Its primary purpose is air defense. For air defense, it can sacrifice many other performances.

 It has no hangar and cannot carry anti-submarine helicopters for a long time. It has no towed sonar at the tail, only bow sonar. At the same time, it does not have a torpedo launcher, and it does not even have an ancestral rocket depth charge launcher.

On a domestic warship, at the very front of the bow and in front of the naval gun, you can see two arc-shaped devices with launchers on them. These are the ancestral rocket depth charge launchers. When an enemy submarine is discovered, You can launch anti-submarine depth bombs to kill the enemy.

 Compared with torpedoes, the biggest feature of this thing is that it is cheap, so in many exercises, you can see this thing being launched in a whoosh, and the scene is very spectacular.

  However, there is no such thing on warship No. 115, except for the bow sonar, there is nothing else.

 Now, they have completed all preparations before attacking, but they have no means to attack!

 “They have no intention of surrender!” The sonar soldier’s words were filled with anger.

This kind of confrontation between submarines and surface ships was too common during the Cold War. Generally speaking, as long as one side launches active sonar waves and hits the other side's hull, it means GameOver, and the other side should float up obediently. After all, It's not in a state of war, so there's no need to really take a deadly attack. However, if it doesn't come out, then the surface fleet can really take a dirty trick.

Now, the other party is so confident?

Everyone has an angry look on their face. The other party insists and refuses to come out. Does that mean he is a toothless tiger? You can only call out a few times, but you can't actually bite the opponent?

“It seems that we have to take off a few anti-submarine helicopters and drop anti-submarine depth bombs directly!” At this time, Wang Qing had no other choice but to invite equipment from his brother units to come on stage.

There is a fleet base in Mingzhou nearby, so you can join the battle at any time and besiege the opponent!

“We must teach them a profound lesson.” Qin Tao said from the side: “How about we continue to attack them with sonar before the helicopter arrives?”

Even at the fastest speed, it will take ten minutes for the helicopter to arrive. During this time, do they want to watch helplessly?

of course not!

 For sonar, its lifespan is very long. Launching several more active sonar attacks will not cause any loss to the sonar.

Wu Shengli's eyes lit up: "That's right, shock them to death!"

Hence, the sonar soldier activated the system again.

　　　　　　　　　　　　　　　　　　　　　　　　 employers。

 Two sonar waves penetrated the water waves and headed towards the underwater submarine again.

　　　　　　　　　　　　　　　　　　　　　　　　 employers。

 When the sound reached the eardrums of the submariners, they felt their hearts trembling.

"They have no other choice but to use this method to declare their sovereignty. We cannot go up. That is the most shameful behavior!" the captain still insisted.

 Bang, bang, two more sounds.

Miraculously, no one yelled inside the submarine this time. The captain nodded with satisfaction: "It seems that they have no other tricks and will only use sonar to attack us."

“Report, I heard the sound of something falling into the water!” At this moment, the sonar soldier on the submarine shouted.

 “What?” the captain was surprised.

 This is definitely not a good sign.

“That thing is falling rapidly in the sea water, it may be an anti-submarine depth bomb!”

"What?"

The captain was completely shocked: "Have other ships arrived?"

"If they have an advanced data link system, they can transmit the target data discovered by their sonar to other ships in the fleet, and those ships can launch anti-submarine depth bombs from long distances!"

“We can no longer hesitate. There was no explosion this time, but they are still demonstrating. If we remain silent, we will really be bombed!”

“Damn it, sail at full speed and get out of this **** place!” The captain finally gave up.

Destroyer No. 115.

The smoke from the 130mm naval gun muzzle dispersed. On the bridge, everyone stared at the gun with great emotion.

 Only Mr. Qin can come up with this method.

Just before the helicopter arrived, they could only use active sonar to attack to scare their opponents. However, Qin Tao had a sudden idea: "Let's try our naval guns!"

 Ship cannon?

Hearing Qin Tao's suggestion, everyone was a little curious: "What's the point of using naval guns?"

“Fire at a high elevation angle to simulate anti-submarine depth bombs falling into the water.”

Wang Qing nodded immediately.

There were no live ammunition in the naval gun at all, only a few training bombs. After receiving Wu Shengli's affirmation, the sailors operating the naval gun immediately became busy.

　　Boom!

A fireball erupted from the 130mm gun muzzle, and the shell flew out, drawing an arc in the sky and flying towards the target twenty kilometers away.

The sound of the shells falling into the water was also heard by their sonar soldiers, and then the sonar soldiers shouted.

 “They’re speeding up!”

 “They’re sailing at full power!”

 A submarine can sail silently in a low-power state. If the engine is turned off, it can disappear without a trace. If it were not for sonar with terrain mapping capabilities, it would be impossible to find it.

Now, it is actively sailing at full power, and the noise has also increased. Even the old Type 051 destroyer can hear it clearly.

 Although it has not surfaced, it is considered as admitting defeat.

“Let’s catch up and send it out!” Wu Shengli said.

 Sending someone out is a polite way of saying it. In fact, it is equivalent to expelling the other person.

 The submarine under the water had already given up. As they started operating at full power, the sound was quite loud, and the underwater detection system of the naval base also discovered their presence.

On the surface of the water, No. 115, which had just had its first day of sea trials, followed the other party, escorting the submarine and sending it out for dozens of nautical miles.

The gas turbine at the back is continuously running, which can also be used to test the ship's high-speed sailing ability.

“It’s time for us to return home, how about a full helm?” Wang Qing was somewhat excited.

“As long as the leader agrees.” Qin Tao had no objection.

"Can."

 So, Wang Qing's voice sounded throughout the ship: "Attention, everyone on the ship, the left rudder is about to be full!"

Everyone held onto things around them. The next moment, the huge hull tilted, and a beautiful arc was drawn on the water. The warship remained steady.

“The design of this warship is really good, and the construction quality is also very high. From now on, our navy will be most at ease with Mingzhou Group’s design and construction of brand-new ships!”

 Some leaders have expressed their stance.

No warship would dare to perform such an operation on the first day of sea trials. Now, the warship has completed a 180-degree turn and begun to return. Everyone is very impressed with the sailing performance of this warship. of satisfaction.

“Thank you for the leadership’s praise and support. We will definitely make persistent efforts.” Qin Tao replied.

 (End of this chapter)