With the waveform and two sets of data on the screen, Hua Jianfeng was silent +7

"I still can't calculate the distance" Le Jiacheng raised his head and sighed, "The noise is too weak, I can only conclude that the distance is more than 70 kilometers"

Hua Jianfeng nodded, not disappointed

Because the distance was too far and the noise intensity was lower than the minimum value required for automatic analysis by computer, Hua Jianfeng asked Lejiacheng to manually control the fire control computer for analysis

In order to maximize the ranging range of the passive sonar, the "Swordfish" turned to the 175 and 210 degree headings successively, and aimed the side at the two noise sources, but the results were still not ideal, because the maximum ranging range of the passive sonar of the "Swordfish" was 70 kilometers, so Rojiacheng could only conclude that the noise source was 70 kilometers away

"Do you want to do it again?"

"There's no need for this," Hua Jianfeng shook his head and asked the sonar chief, "Has the noise intensity increased?" ”

"Not very clearly, within the 'Virginia' minimum noise range"

Because the construction process of each submarine is different, there will always be slight differences, so the minimum noise of the first class submarine is not a fixed value, but the minimum noise of the "Virginia" class attack nuclear submarine measured by the Navy of a range of republics is between 962973 and belongings

Hua Jianfeng pondered for a while and said: "I don't believe that the Yankees can calm down, let's wait patiently."

Le Jiacheng did not object, and there was no other good way to wait at this time

In order to "attract" the US submarine, the "Swordfish" retracted its towed sonar after turning and ran at a speed of 24 knots for about two minutes

"Maybe Du Xinghua and Liu Haifeng heard the noise we made"

"Them?" Le Jiacheng smiled and shook his head, "Maybe they are waiting for an opportunity hundreds of kilometers away"

"Is it possible?" Hua Jianfeng glanced at his partner: "You don't know them, but I know them very well, Du Xinghua, this kid was admitted to the submarine academy with me, graduated together, and served in the submarine force together, but every time I was promoted, my luck was better than mine, and I almost missed a lot of opportunities."

If he has a chance, he will not even let go of the US aircraft carrier battle group, Liu Haifeng is two years later than us, but his ambition is not small, I heard that he boasted last year that Haikou will surpass Du Xinghua within two years, surpass me within three years, and become the number one ace captain of the republic, do you think these two guys will wait for the rabbit? ”

"The question is, will they be able to get there before us?"

"Why not?" Hua Jianfeng smiled and shook his head, "In addition to the twelve vertically launched anti-ship missiles, 095 can carry thirty-eight torpedoes and missiles In the first round of battle, two 095s ambushed the Third Fleet, without consuming much ammunition, and they don't have to return to the base, I bet that they have been waiting here for several days, and they have long been eyeing those two US submarines, just waiting for the opponent to enter the war zone!" ”

"If they're nearby, how can we be aware of it?"

"You underestimate their determination to get the results too much" Hua Jianfeng smiled and said, "Before the Type 095 was put into service, the ordinary battery was replaced with the 'Longxiang battery', even if the nuclear reactor is shut down, it can sail hundreds of kilometers underwater, if it stops, use the battery to power the oxygen generator and other life maintenance systems, and can stay under the sea for ten days and half a month After arriving at the ambush area, they will definitely shut down the nuclear reactor, try to reduce the noise, and wait for the Yankees to take the initiative to come to the door."

"It's been 7 days, and that's crazy, isn't it?"

Le Jiacheng was shocked that the nuclear submarine was not unable to shut down the nuclear reactor, but that it needed a lot of electricity to restart the nuclear reactor.6 Earlier, the "Gun Squid" was ambushed by the US military in the Indian Ocean, was injured by a torpedo, and had to shut down the nuclear reactor and use batteries to provide electricity to the necessary equipment, and as a result, it had to restart the nuclear reactor after only staying underwater for more than 20 hours

2095 arrived after the first round of conflict and had been here for several days

Even if the "Longxiang battery" is much better than the ordinary battery, in the case of providing electrical energy to the life maintenance system, fire control system and passive detection system, it will last for a few days at most, because it has not been tested, and no one can say for sure how many days it can last

"Captain!"

Hearing the sonar chief's shout, Hua Jianfeng and Le Jiacheng turned their heads at the same time

The sonar chief tapped on the screen in front of him, looking excited

Hua Jianfeng strode over a few times, and when he saw the set of numbers on the screen, he immediately showed joy

974, the noise intensity from the direction of 120 degrees exceeded the minimum noise of the "Virginia" class attack nuclear submarine, and the noise intensity from the direction of 85 degrees also reached 974 belongels

"Don't worry, keep observing" Hua Jianfeng grabbed the sonar chief's shoulder, "Maybe those two 'Virginia' ships have broken down and their performance has been reduced."

The sonar chief whispered, "I think they're approaching this way."

Hua Jianfeng nodded, not in a hurry to make a judgment

Needless to say, Rokat Cheng re-calculates the distance to the source of the noise by hand

As the minutes passed, the atmosphere in the command center gradually became tense

After about 5 minutes, the intensity of the two noise sources reached 97

"Family!" Hua Jianfeng looked back at his deputy

"Calculating" Le Jiacheng took a deep breath, while inputting data into the fire control computer, he stared intently at the tactical screen, "It's out, the distance of 120 is 67 upward, and the distance in the direction of 85 is 66, and it has just entered the ranging range of passive sonar"

"Combat status!" Hua Jianfeng quickly returned to the command post and "checked the status of the torpedo and calculated the fire control data as soon as possible"

The officers and men in the command center immediately became busy, and so did the officers and men of the whole boat

"Torpedo inspection complete, in the best condition"

"The noise is too weak to come up with fire control data"

Hua Jianfeng frowned slightly, glanced at the data on the tactical screen, and said; "Heading 105, Depth 240, Speed 6"

Le Jiacheng hesitated for a moment and nodded to the officer at the helm

"Lao Hua, let's catch up, will it ......?"

"Don't worry, I won't cross the border line of the theater of operations" Hua Jianfeng smiled coldly and said, "We will wait at the door and strive to lock on to the target as soon as possible, as long as the US submarine enters the theater of operations, we will use torpedoes to entertain dogs."

Seeing Hua Jianfeng's resolute attitude, Le Jiacheng couldn't say anything

"No. 1, 2, and 34 torpedo tubes are filled with water in advance," Hua Jianfeng said to the gunners officer, "prepare for firing in advance, and after giving the order to attack, be sure to fire the torpedo as quickly as possible."

"The torpedo tubes are filled with water, and the combat units are ready"

Hearing the slight sound of filling the torpedo tubes with water, Hua Jianfeng glanced at the noise detector

102 shells, will it expose the whereabouts of the "Swordfish"?

When Hua Jianfeng was worried, Lejiacheng did the actual work, entering a string of data into the fire control computer, and the calculation results appeared on the screen

"It shouldn't be heard by the U.S. military," Le Jiacheng lowered his voice and said, "unless there is a third U.S. submarine within 35 kilometers."

Hua Jianfeng nodded, and he also saw the calculation results that appeared on the screen

In addition to its own performance, the detection distance of passive sonar is mainly determined by three factors, one is the noise intensity of the target, the second is the temperature, salinity, direction and speed of the surrounding seawater, the intensity of environmental noise, and the third is the intensity of its own interference noise

With these three sets of data, it is possible to determine whether the sound of the "Swordfish" will be heard by the enemy

In the next few tens of minutes, Hua Jianfeng has been paying attention to the noise intensity value of the 2 targets, and under the condition that he can measure the distance of the enemy ship and roughly grasp the characteristic noise of the enemy ship, he can roughly judge the sailing speed of the enemy ship through the noise intensity emitted by the enemy boat, so as to infer the tactical intention of the enemy ship

If the enemy ship is not aware of the active attack within the quiet speed, on the contrary, the enemy ship is looking for fighters

"Captain, fire control data!"

Hearing the sonar chief's report, Hua Jianfeng immediately glanced at the value on the screen, 982 decibels!

If the 2 "Virginia" class attack nuclear submarine had not suffered mechanical failure and was in normal use, the sailing speed at this time would definitely be more than 10 knots!

This is not a combat patrol, but a seizure of an ambush position

"The distance is 54 and 52, the target depth is 210 and 200, and the course is 235215" Le Jiacheng hesitated slightly, "2 submarines are heading towards the place where we made a noise, preparing to outflank us from both sides, and definitely want to besiege us!" ”

Hua Jianfeng nodded and said, "Target speed? ”

"Still calculating" Le Jiacheng wiped the sweat on his forehead, "It's too far, the torpedo hit rate won't be very high"

"I know" Hua Jianfeng said as he called up the chart of the theater of operations, marking the scope of the theater with a red line, "Turn to 15 degrees, 4, maintain depth"

Le Jiacheng's brows jumped a few times, and the fire control computer was set to automatically calculate the fire control parameters

"The speed of the No. 1 target is 12, and the speed of the No. 2 target is 13 long, "far exceeding the quiet speed of the 'Virginia', and the tactical intent is very obvious"

"Reset the route" Hua Jianfeng signaled to his deputy to personally grasp the route, "When we turn around, we will calculate the fire control parameters again, and then aim at the 2 US submarines, as long as the Yankees dare to come, we will not show mercy."

Le Jiacheng nodded and walked behind the officer at the helm

Hua Jianfeng took a deep breath, now it is not a question of whether to fight or not, but whether the Yankees have the guts

Time flew by, and after about 30 minutes, the "Swordfish" turned 180 degrees, aimed the left hull at the 2 US submarines, and the gun regiment took the place of the deputy commander to calculate the fire control data again

After giving the order to input fire control data for the torpedo, Hua Jianfeng let the "Swordfish" return to the course of the course

"No. 1 and No. 3 torpedoes in autonomous attack mode, 24 torpedo in line guide mode......"

"Captain, what's new!"

Hua Jianfeng was stunned for a moment and looked at the sonar chief

"The target is gone!"

"What!?"

The information was displayed on the tactical screen, and the 2 "Virginia", which was still under the surveillance of the "Swordfish" at the beginning, "disappeared" when it was about to cross the Okinawa trough! (To be continued)