After the passive sonar on the side can receive the target noise, Liu Haifeng lets the "River Porpoise" drag-and-drop sonar.

It is indeed inconvenient to bring a "tail" that is several thousand meters long. Although the "Tubun" class adopts the most advanced electric water-jet propulsion device, the retracting and retracting port of the towed sonar is at the top of the fixed surface of the lower rudder. Even if the submarine performs high-intensity maneuvering, the towed wire will not entangle the propulsion device, but when the submarine is sailing at high speed, the towed sonar will interact with the wake, causing very obvious noise.

If possible, the captain will not use drag-and-drop sonar.

After confirming that the side-side passive sonar could continue to track the target, Liu Haifeng accelerated the submarine to 8 knots.

Liu Haifeng regards the simplest task to deal with conventional submarines without support. Not to mention dealing with conventional submarines, even if they encounter nuclear submarines, Liu Haifeng will not be afraid at all.

"It's better to use the old tactics, first attack the three targets in the distance with dual-speed self-guided methods, and then attack the three targets in the near distance with full-speed linear guides." Zhang Xuefeng knocked on the big screen with the real tactical situation. "According to past experience, the attack success rate exceeds 90%, so the stick submarine should not slip away."

Liu Haifeng nodded. The tactics were a bit old-fashioned, but they worked very well.

"Captain"

Liu Haifeng was stunned for a moment and looked at the sonar. "What's the matter?"

“There is a small problem.”

"What's the problem?" Liu Haifeng walked over. There were no "small problems". Any minor mistakes could lead to failure. The results were lost and dozens of officers and soldiers were even ruined.

"The sonar detected only five targets."

"What!?" Liu Haifeng was shocked and fell behind the sonar console in two steps. "Why are there only five goals?"

"There are indeed only five targets." The sonar displays the image on the central ground screen. "Six targets were detected ten minutes ago. But the computer just reanalysed it. The result was five, not six."

"Impossible. Re-analysis." Zhang Xuefeng also walked over.

"Analyzed three times. The conclusions were all five goals."

Liu Haifeng and Zhang Xuefeng looked at each other and realized the seriousness of the problem.

"Calling the target route data back and confirming the disappearance of the target."

The sonar did not dare to talk too much, and immediately recalled the data.

Seeing the data displayed on the screen, Liu Haifeng and Zhang Xuefeng frowned.

The submarine that suddenly disappeared had an average speed of only 6 knots before, and the slowest speed of navigation among the six targets. Most importantly, before disappearing, the submarine had landed behind another 5~submarine ground, and the distance from the nearest submarine was about 1 meter.

"It must have been deliberately slowing down, or it has stopped."

Liu Haifeng nodded and said, "Prepare the communication buoy and send the message out."

Zhang Xuefeng frowned slightly and called the communication officer over.

Although it was not stated clearly, Liu Haifeng and Zhang Xuefeng were tacitly aware. Before the unexpected situation occurred, neither of them wanted the sea-surface warships and anti-submarine aircraft to participate in the "fight between submarines". They were very sure to kill the Korean submarine before the aircraft carrier battle group was threatened. Now it is different. The sixth Korean submarine suddenly disappeared. With the power of the "River Porpoise", it is difficult to ensure the safety of the aircraft carrier battle group.

Compared with personal results, the safety of the air combat group is more important.

Two minutes later, the "River Porpoise" popped up a communication float, sending out the news that the South Korean submarine approached the aircraft carrier battle group.

"What should I do now?" Zhang Xuefeng numbered five targets one by one on the large screen of the tactical podium.

"It's okay to fight!" Liu Haifeng's answer was very firm, "First kill the five rod submarines approaching the aircraft carrier battle group. According to the previous tactics, first use six torpedoes to attack the three submarines with the farthest distance, and then use four torpedoes to attack two submarines nearby. However, all of them are in full-speed self-guided mode. After launching the torpedo, turn immediately and use active attack sonar to search for the sea area near the vanishing point of the target No. 6."

"Is this necessary?" Zhang Xuefeng said with a cold smile, "We fire torpedoes, and the stick submarine behind us will hear it. Without us using active sonar, the stick submarine will take action."

"Maybe, the stick submarine escaped on its own initiative?" Liu Haifeng smiled and looked at his watch. "The battle group's helicopters will arrive within twenty minutes. We will launch an attack in fifteen minutes. As you said, don't rush to use active attack sonar. If the stick submarine dares to attack, we will give back all torpedoes!"

"Then you have to prepare for a return flight."

"The supply ships are not preparing torpedoes for us, are they?"

Both of them laughed and looked very relaxed.

At 211:55, the "River Porpoise" entered the state of combat.

"Report the target situation." Liu Haifeng sat in the commander's position.

"The distance of the No. 1 target is 35, speed 8, depth 220, the distance of the No. 2 target is 33, speed 8, depth 200, the distance of the No. 3 target is 30, speed 8, depth 240, the distance of the No. 4 target is 27, speed 8, depth 200, the distance of the No. 5 target is 24, speed 8, depth 220."

"Lock targets 1, 2, and 3, monitor targets 4 and 5." Liu Haifeng glanced at his partner standing next to the tactical command platform and said, "Target No. 1, 2, Torpedo attack target No. 1, 3, Torpedo attack target No. 2, Torpedo attack target No. 5, 6, Torpedo attack target No. 3, full-speed self-guided mode, input fire control information for torpedoes."

“It’s now

Control information...input is completed."

"Inject water from the torpedo tube and open the outer cover."

"The water injection of torpedo launch is completed." After adopting the new torpedo launch system, the noise generated when injecting water into the torpedo launch tube is much lower than before.

"The cover opens!"

"In five seconds, the torpedoes are launched in turn... Launch!"

"No. 1 torpedo out of pipe, No. 2 torpedo out of pipe..."

When the Ordnance Commander reported the situation, the dull sound of the torpedo was heard one after another, followed by the huge noise made by the torpedo when sailing at high speed in the sea. No matter how advanced the technology is, because the fluid noise cannot be solved, very obvious noise will be generated when the torpedo sails at full speed.

"Reload!" Liu Haifeng stood up and said to the sonar, "Target No. 4 and 5?"

"There is no change, and the sound has not passed."

"Solve the fire control parameters and prepare to input fire control data for torpedoes."

Because the mass of submersible heavy torpedo land is about 2,000 kg, it is not as easy as reloading a torpedo in a submarine as reloading a cannonball in a tank. Even with the help of automatic loading equipment, it still takes 20 to 30 to complete the loading operation, and it also depends on the quality of the torpedo soldiers.

Fortunately, the "River Porpoise" has the best submarine soldiers.

Less than 20, the Ordnance Captain received a report from the fish cabin. "Captain, loading is complete."

"Repeat attack mode, five seconds intervals, ready to launch a torpedo." In order to increase the attack speed, Liu Haifeng saved a lot of instructions, "All launch tubes are injected with water, about 1 out of the outer cover!"

Zhang Xuefeng replaced the ordnance commander and entered control information on the console.

"The water injection is completed, the outer cover is opened."

Liu Haifeng nodded to his partner not long afterwards.

There was another dull sound, followed by the huge noise from the torpedo.

"The first down 25, the tail up 25, the tail lift cabin is empty, the tail lift cabin is advanced at full speed, diving depth 540." Liu Haifeng took a deep breath and glanced at the officers and soldiers in the command center, "Keep quiet!"

Without Liu Haifeng's instructions, the officers and soldiers held their breath.

This is not an exercise. The "River Porpoise" sent the deadliest "gift" to the 5 Korean submarine at the fastest speed. Whether the Korean submarine avoids torpedoes or turns to attack the "River Porpoise", when the sixth Korean submarine does not appear, the "River Porpoise" must transfer its position as soon as possible and conceal its whereabouts.

Zhang Xuefeng looked at his watch and muttered silently.

The vanishing point of the No. 6 target is about 25 kilometers away from the torpedo launched by the "Jiang Porpoise", and the sound wave transmission does not have a clear direction, so the No. 6 target must have heard the noise emitted by the torpedo. If the Korean captain is more courageous and ambitious, he will take this opportunity to attack the "Jiang Porpoise". Because the "Jiang Porpoise" does not make obvious noise, and the torpedo, as the source of noise, is sailing at high speed, so Korean submarines must use active attack sonar before launching the torpedo.

Zhang Xuefeng had just arrived, and the "River Porpoise" vibrated slightly.

"Captain, take the initiative to sonar!"

"I feel it!" Liu Haifeng smiled coldly and said, "Right-right rudder, determine the direction of the sonar wave, and actively attack the sonar charging!"

"From the sea!" Sonar looked back at Liu Haifeng and Zhang Xuefeng.

Liu Haifeng's brows jumped a few times and looked at Zhang Xuefeng.

The Korean captain has some skills, and he actually knows to use the sea surface to reflect sonar waves to avoid exposure.

"Calculate the reflection angle of the sonar wave and determine the rough search position." Zhang Xuefeng gave an order for Liu Haifeng, and then said to his partner, "The sonar is ready and can be used at any time."

"You said, how cool is the captain of the stick?"

"At least it's pretty good yet."

Liu Haifeng laughed, and Zhang Xuefeng also laughed.

"Captain, the calculation results are out, on the main screen."

Liu Haifeng and Zhang Xuefeng looked at the big screen on the tactical console at the same time. Sound waves were reflected through the sea surface and the seabed. As long as the incident angle and depth of the sound waves were known, the nearby Haiti terrain could roughly calculate the convergence area of ​​the sound waves, and the submarines that emitted the sound waves were in these convergence areas.

"The convergence area of ​​No. 1 and No. 2." Liu Haifeng knocked on the screen.

Zhang Xuefeng nodded and took the initiative to attack the sonar himself.

"Torpedo ready."

"It's ready, the No. 5 and No. 6 torpedoes can be launched at any time, and the No. 1 torpedo has been loaded."

Liu Haifeng nodded to the ordnance chief and said nothing more.

Before launching a torpedo, you must first confirm the location of the target before you can decide which attack tactic to adopt.

Zhang Xuefeng glanced at his partner and said that the sonar was ready. Liu Haifeng did not hesitate and nodded slightly.

The "River Porpoise" vibrated slightly again, and an inaudible insonic wave of infernal sound wave shot out from the star sonar array at the bow of the boat, rushing toward the Korean submarine more than 20 kilometers away at a speed of more than 2,000 meters per second.

Liu Haifeng knew that if the Korean submarine captain had some skills, he had already launched a torpedo at this time.

However, the Korean captain will not allow the torpedo to sail at the fastest speed, but will approach the "Jiang Porpoise" at a lower speed, and then sprint at the fastest speed within the unescapable distance of the "Jiang Porpoise".

Winning and losing are often only a line away! (To be continued,)
Chapter completed!