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

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 has significant economic benefits.

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 designed by Lao Maozi 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

This equipment will not be missing.

Moreover, 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 and calmly: "Unknown submarine?

"

"Yes, we heard its movement just now when we were turning, indicating that this unknown submarine was 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 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 saying such things.

"This shows that someone is very interested in our warship. When 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 unknown submarine. This was a dereliction of duty, 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 means that the submarine completely stops making any noise, the engine stops, and even the personnel cannot speak loudly to ensure that no sound is made. It is completely hidden in the quiet sea water, and some even sink 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 opponent starts to move again. At this time, the competition is about who is more patient.

If it were normal times, Qin Tao would not have any say in the warships conducting various military operations, but it is different now. The 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 is saying now, of course he has his own personal purpose.

"If we don't use anti-submarine helicopters, what should we use?" Wu Shengli asked.

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

vertex

"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 still find it!"

"That's right!" The technicians from the 715 Institute were excited: "Our sonar has this ability. Now, let them know how powerful we are!"

In China, the 715 Institute 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 taken back by the 715 Institute for research.

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

Didn't they intend to use it as 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

Stay silent and follow the underwater currents to reach the depths of the ocean."

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. If the sea water below is impacting the continental shelf, that is, when the tide is high, then

Our side can wait patiently and watch them be washed and stranded. But now, the ocean current here flows to the depths of the ocean. If we don't act quickly, the opponent will take advantage of the navy's advantage to escape.

Therefore, 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 that stubborn person. He is good at listening to the opinions of his subordinates.

Moreover, he had never seen a warship's radar capable of terrain mapping. This time, it was just an eye-opener.

"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 a 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 mode to minimize his own noise. The helmsman steered the warship. After the target disappeared, the active sonar mode was activated.

Peng, Peng, Peng!

Low-frequency sound is formed on the membrane of the sonar, and then spreads around along the seawater. Ripples suddenly appear underwater. The mechanic is paying attention to the power supply of the warship. At this time, as the sonar active mode

After starting, the power supply is still stable.

This kind of active sonar has a transmission 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 demand 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 alternative. When the Navy's Aegis warships continue to make dumplings, the two 051Cs will become more and more embarrassing.

It is not cost-effective to make large-scale modifications, and it is unnecessary to make small changes. Put aside how to modify it 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 picture download 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 capabilities!"

"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 were getting bigger. The second sonar wave went out and reflected back, and there were one more graphics, then a third, a fourth... Finally, the screen was full.

"Sea Area 42, there is an unknown object in this trench!" the sonar soldier pointed at the graphics on the screen and reported.

The other party was so cunning. After being discovered, he actually chose to hide in the trench! If it weren't for the active sonar mapping mode, he wouldn't have been able to find it at all!

This trench is also washed out by the river, so the opponent's submarine can follow the trench, slowly outward, 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 to scare these bastards 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 to remain silent while searching for the trench, intending to escape quietly.

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

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

Are the speakers for square dancing loud enough? It’s only one hundred watts. The power of hundreds of kilowatts is equivalent to a thousand square dancing speakers, aimed at the same place! Moreover, sound propagates in liquids faster than in gases.

The middle is more powerful.

For any submariner, this would be a death sentence!

Peng, Peng!

Two powerful sound waves left the ship's bow sonar, and 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! (Exaggeration)

, the real thing should not be so powerful.)
To be continued...