After the passive sonar on the board was able to receive the target noise, Liu Haifeng let the "finless porpoise" tow sonar. 【Reading.com】

It is really inconvenient to bring a "tail" several kilometers long. Although the "Dolphin" class uses the most advanced electric waterjet propulsion device, and the towed sonar is retracted at the top of the fixed surface of the lower rudder, even if the submarine performs high-intensity maneuvers, the towed sonar will interact with the wake when the submarine is sailing at high speeds, producing very obvious noise.

Conditionally, neither captain will use towed sonar.

After confirming that the sideside passive sonar was able to track the target continuously, Liu Haifeng allowed the submarine to accelerate to 8 knots.

Dealing with conventional submarines without support forces is regarded by Liu Haifeng as the easiest task. Not to mention dealing with conventional submarines, even if he encounters a nuclear submarine, Liu Haifeng will not have the slightest fear.

"It's still the old tactic, first attacking three targets in the distance in a dual-speed self-guided way, and then attacking three targets in the near distance in a full-speed line guidance way." Zhang Xuefeng knocked on the big screen of the realistic tactical situation, "According to past experience, the success rate of the attack is more than 90 percent, and the stick submarine doesn't want to slip away." ”

Liu Haifeng nodded. The tactics are a bit old-fashioned, but they work.

"Captain"

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

"There's a small problem."

"What's the problem?" Liu Haifeng walked over. Submarine warfare. There are no "minor issues". Any slight mistake can lead to a failure. Send away the results of the battle. and even buried dozens of officers and soldiers.

"The sonar only detected five targets."

"What!?" Liu Haifeng was taken aback. Two steps to the back of the sonar console. "How come there are only five targets?"

"There really are only five goals." The sonar chief displays the image on a large central screen. "Six targets were also detected ten minutes ago. But just now it was re-analyzed by the computer. The resulting result is five. And not six. ”

"No way. Re-analysis. Zhang Xuefeng also walked over.

"Analyzed three times. The conclusions are all five goals. ”

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

"Recall the target route data back to confirm the situation of the disappearing target place."

The sonar chief didn't dare to be wordy, and immediately called up the data.

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

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

"It must have been a deliberate slowdown, or it had stopped."

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

Zhang Xuefeng frowned slightly and called the communications officer over.

Although it was not explicitly stated, Liu Haifeng and Zhang Xuefeng tacitly agreed. Neither of them wanted to involve surface warships and anti-submarine aircraft in a "submarine battle" before the unexpected happened, and both were fully sure that they would take out South Korean submarines before the carrier battle group was threatened. Now it is different, the sixth South Korean submarine suddenly disappeared, and it is difficult to ensure the safety of the aircraft carrier battle group with the "Finless Porpoise" alone.

The safety of the air battle group is more important than the individual results.

Two minutes later, the "Finless Porpoise" ejected a communication buoy and sent out the news that the South Korean submarine was approaching the aircraft carrier battle group.

"What now?" Zhang Xuefeng numbered the five targets one by one on the big screen of the tactical command platform.

"It's right!" Liu Haifeng's answer was very resolute, "First kill the five stick submarines that are approaching the aircraft carrier battle group, and according to the previous tactics, first use six torpedoes to attack the three submarines at the farthest distance, and then use four torpedoes to attack the two submarines in the vicinity, but all in full-speed self-guidance mode." Immediately after firing the torpedo, it turned and searched the sea area near the disappearance point of target No. 6 with active attack sonar. ”

"Is this necessary?" Zhang Xuefeng smiled coldly and said, "If we shoot a torpedo, the stick submarine behind the butt will hear it, and the stick submarine will take action without us using active sonar." ”

"Perhaps, the stick submarine escaped on its own initiative?" Liu Haifeng smiled and glanced at his watch, "The helicopters of the battle group will arrive in twenty minutes, and we will attack in fifteen minutes." According to you, there is no rush to use active attack sonar, and if the stick submarine dares to sneak attack, we will return all torpedoes! ”

"Then we have to get ready to go home."

"The supply ship won't have torpedoes left for us, right?"

Both laughed and looked very relaxed.

At 211:55, the "Finless Porpoise" entered combat mode.

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

"Target No. 1 is at a distance of 35, speed 8, and depth 220, target No. 2 is at a distance of 33, speed 8, and depth 200, and target No. 3 is at a distance of 30, speed 8, and depth 240, and target No. 4 is at a distance of 27, speed 8, and depth 200, and target number five is at a distance of 24, speed, and 8, and depth is 220."

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

"Yes

Control information...... Finished entering. ”

"The torpedo tube is filled with water, and the outer cover is opened."

"The torpedo shot is complete." With the introduction of the new torpedo system, the noise generated by filling the torpedo tubes with water is much lower than before.

"The lid is open!"

"At five-second intervals, torpedoes are fired sequentially...... Shoot! ”

"Torpedo No. 1 out of tube, No. 2 torpedo out of tube......"

As the ordnance chief reported the situation, there was a dull sound of torpedo firing, followed by a loud noise of torpedoes at high speed in the sea. No matter how advanced the technology is, because there is no solution to fluid noise, when a torpedo is traveling at full speed, it produces a very noticeable noise.

"Reload!" Liu Haifeng stood up and said to the sonar chief, "What about the fourth and fifth targets?" ”

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

"Solve the fire control parameters and prepare to enter the fire control data for the torpedo."

Because the ground mass of submersible heavy torpedoes is about 2000 kg, it will not be as easy for a submarine to reload a torpedo as it is for a combat vehicle to reload an artillery shell. Even with the help of automatic loading equipment, it still takes 20 to 30 to complete the loading operation, and it depends on the quality of the torpedo crew.

Fortunately, the "Finless Porpoise" has the best submariners.

Less than 20, the Ordnance Chief received a report of the fish hatch. "Captain, reloading."

"Repeat the attack mode, with five-second intervals, ready to fire a torpedo." In order to increase the attack speed, Liu Haifeng saved a lot of instructions, "All the barrels are filled with water, about 1 to the outer cover!" ”

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

"After filling the water, the outer lid is opened."

Liu Haifeng didn't have to wait for a long time, and nodded to his partner.

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

"25 down, 25 on the tail, empty the tail lift cabin, advance at full speed, dive to a depth of 540" Liu Haifeng took a deep breath and glanced at the officers and soldiers in the command center, "Keep quiet!" ”

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

This was not an exercise, and the "Finless Porpoise" delivered the deadliest "gift" to the 5 South Korean submarines at the fastest speed. Regardless of whether the South Korean submarine evaded the torpedo or turned to attack the "Porpoise," the "Finless Porpoise" must move its position as soon as possible to conceal its whereabouts when the sixth South Korean submarine does not appear.

Zhang Xuefeng glanced at his watch and muttered silently.

The disappearance point of target No. 6 was about 25 kilometers away from the location of the torpedo fired by the "finless porpoise", and there was no clear direction of sound wave transmission, so target No. 6 must have heard the noise of the torpedo. If the South Korean captain had been more bold and ambitious, he would have taken this opportunity to attack the "Finless Porpoise". Because the "Finless Porpoise" did not make a noticeable noise, and the torpedo, which was the source of the noise, was sailing at high speed, the South Korean submarine had to use active attack sonar before firing the torpedo.

As soon as Zhang Xuefeng read it, the "finless porpoise" shook slightly.

"Captain, active sonar!"

"I feel it!" Liu Haifeng smiled coldly and said, "The right full rudder, determine the direction of the sonar wave, and take the initiative to attack the sonar to charge!" ”

"From the sea!" The sonar chief looked back at Liu Haifeng and Zhang Xuefeng.

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

The South Korean captain still has some ability, and he actually knows how to use the sea surface to reflect sonor waves to avoid his whereabouts being exposed.

"Calculate the angle of reflection of sonar waves to determine the approximate search location." Zhang Xuefeng gave an order for Liu Haifeng, and then said to his partner, "The sonar is ready and ready to be used." ”

"How's the guts of Captain Stick, you say?"

"At least so far, it's not bad."

Liu Haifeng smiled, and Zhang Xuefeng also laughed.

"Captain, the calculations are out, on the home screen."

Liu Haifeng and Zhang Xuefeng looked at the big screen of the tactical console at the same time. Sound waves are reflected from the surface of the sea and the seabed, and as long as you know the angle of incidence and depth of the sound waves, and the topography of nearby Haiti, you can roughly calculate the convergence zone of the sound waves, and the submarine that emitted the sound waves is in these convergence areas.

"Sonic Convergence Zone 1 & 2." Liu Haifeng tapped on the screen.

Zhang Xuefeng nodded and personally operated the active attack sonar.

"Torpedo ready."

"Ready, torpedoes No. 5 and No. 6 are ready to fire, and torpedoes No. 1 have been loaded."

Liu Haifeng nodded at the armory chief and didn't say anything more.

Before firing a torpedo, it is necessary to confirm the location of the target before deciding what attack tactics to use.

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

The "Finless Porpoise" once again shook slightly, and an infrasonic wave, which was inaudible to the human ear, shot out from the sonar base array of the star in the bow, rushing to the South Korean submarine more than 20 kilometers away at a speed of more than 2,000 meters per second.

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

It's just that the South Korean captain will not let the torpedo sail at the fastest speed, but will approach the "Finless Porpoise" at a lower speed, and then sprint at the fastest speed within the inescapable distance of the "Finless Porpoise".

There is often only a thin line between victory and defeat! (To be continued, if you want to know how to know the future chapters, more,!) )