I don't know how long I slept in a groggy state, Lin Xiuxuan was awakened by the harsh battle siren, he sat up all of a sudden, and there was no sound, it seemed to be just a dream, but when he looked up, he found that a silent red light was flashing on his head. He raised his wrist and looked at his watch, 10 hours had passed, so he quickly got out of bed and rushed to the command module.

"Target heading, speed?"

"At the moment the course is 270, the speed is maintained at 15 knots, and there is no change for 2 consecutive hours."

"Continue to probe the distance."

Lin Xiuxuan didn't step into the command cabin, he heard Cheng Dayang and Chu Aiyun talking inside, and everyone else sat nervously at their respective posts, only Cheng Dayang stood behind the periscope.

"Hayashi, you're just in time, you're about to catch up with Izumo. They currently have 4 boats, with Izumo in the middle. ”

"How far?"

"Radar can't detect it yet, but sonar can preliminarily calculate the distance."

"Active sonar?"

"Of course not, we won't use the active one until we have to, we use the passive one, Chu Aiyun is calculating."

Lin stood quietly behind Cheng Dayang on the edge of the drawing table, watching him use the calculation board to detect the enemy's location and distance. Roughly speaking, the distance of the enemy and the rate of change of distance can be calculated by counting the change angle of the relative position of the enemy's warship and 419 over a period of time, and cooperating with the sonar department to detect the rotational speed of the enemy's main engine and the corresponding speed. Not very precise, but it can support * attacks.

"Captain, Izumo is about 55 kilometers." Chu Aiyun came to a conclusion.

"When can we catch up?" Lin asked.

"It's expected to be tomorrow morning, and then the attack can be launched. The entire enemy fleet was slowed down by the broken ship of Izumo. ”

"Their anti-submarine formations, is there a threat to us?"

"The threat will not be very big, but there is nothing wrong with expecting the enemy to be lenient, the biggest threat must come from Changliang, it is estimated that it is a listener, there may not be active sonar, in fact, we don't know much about the anti-submarine capabilities of these opponents, and we will immediately conduct several tests, by the way, according to your meaning, let them know that there are several submarines around the vicinity."

"Can you tell us about the plan?" Lin asked politely.

"Since yesterday we have been sending out some fake telegrams, of course they cannot decipher, but if the enemy is not too wasteful, it is possible to decipher the numerical part of the text, which can roughly be seen as a certain time, simply simulating a communication between a submarine and the American consulate, in which there is an agreed time for the next contact. Of course we used Hawaiian time. Can you trick the enemy into seeing fate? ”

"I think it's too much, the shadow we are facing is a very suspicious guy, and it is not so easy to follow the trap."

"Don't be afraid, even if he sees it, he will think that we are trying to blame other countries in the United States, and it is definitely not China."

"By the way, what anti-submarine means will they have?"

"I can't think of anything more powerful than deep water*."

"Isn't the Japanese spear* very powerful?"

"For me, the threat of a direct flight * is 0."

Cheng Dayang impatiently pushed back Lin's layman's words.

At the same time, the Japanese light cruiser Nagara was on board. Naoi Daisa, who had just been woken up, rushed to the bridge with strong spirits, and the telecommunications room once again found that there were enemy submarines conducting short-wave communications around, the direction was unknown, and the content of the message was unknown, but the communications staff officer could calculate that the distance was not far by virtue of experience, so the deputy captain considered it and decided to let the captain deal with it.

Since the fleet set sail, they have continued to find problems around, if it weren't for Izumo's speed falling from 17 knots to 14.5 knots, they would probably have thrown off these submarines a long time ago, judging from common sense, there is at least one submarine that takes advantage of the night and travels at high speed on the water, otherwise it will not be able to catch up, which country's enemy has such great ingenuity and courage, no one knows.

Naoi Osa looked up at the sky, there was no trace of moonlight at all, there was still a light rain in the sky, today was the darkest night of the month, judging by common sense, it was unlikely that from the periscope it would be possible to see the unlit fleet passing a few nautical miles away.

"Dazuo, the enemy must stay at sea, follow us or sail side by side, otherwise it is impossible to maintain the same high speed as us."

The deputy captain on duty hastened to introduce the strange situation at night.

"Communications staff officer, send a message to Qiyun and ask it to do a circular search around the fleet, and the radius will be expanded to 3.5 nautical miles. Are there any other signs that there are enemy submarines? ”

"The listening device did not detect any signs of the submarine's approach."

"There's no reason, how can a submarine follow us at night?"

Dazuo did not have the concept of modern observation and communication equipment, he could not imagine the reason why he was always caught by submarines, in fact, the trajectory of his cruiser was always under the surveillance of 419, sometimes through the side sonar, sometimes through the simpler radar detection, these active and passive means, he had no way of knowing.

The communication sent by the Changliang was intercepted by 419 at the same time, and Cheng Dayang immediately knew the enemy's purpose. Sure enough, the broken destroyer began to speed up and sailed around Izumo. Normally, such search voyages are designed to prevent enemy submarines from getting in, and even if they do, not to raise their periscopes at a distance where they might fire or observe.

419 is dozens of kilometers away, still cautiously diving to the sea, the first round of the battle is completed, the enemy's catty and two miles of the ocean has been mastered, he is not in a hurry to attack, he must hurry to seize the lead. Attacking at night, the time was too reluctant, so I could only wait until dawn and calmly start the battle.

After the dive, he began to increase the power of the submarine, increasing the speed of the submarine to 20 knots. By the time the first rays of sunlight hit the sea, 419 had already overtaken the enemy fleet, leading by about 40 kilometers.

As soon as the submarine surfaced again, it was out of sight of the enemy, using radar to accurately distance the enemy ship, and the enemy still maintained an average speed of about 14.5 knots, and it was determined that Izumo's boiler failure had not been eradicated, which was probably one of the reasons why he was in a hurry to return to Yokosuka, the gantry crane at the Jiangnan plant was not large enough, and it needed a bridge crane on slipway No. 1 of the naval factory for a complete overhaul.

Xu Su, a crew member on the 419th, opened the weapon loading port on the front A class, and pushed 2 drones down the sea from here, and if they needed to carry *, they could not be launched from the * tube.

The two drones glided over the water for a section and rose into the air one after another. One of them carries ordinary laser-guided*, and the other carries a cloudburst bomb.

Using the radar to finally follow all the target positions, the 419 re-dived into the water, leaving only the periscope and electronic mast on the surface. According to the information we have learned, the enemy's formation has been stretched, except for the flag clouds patrolling the perimeter, the other two escort ships are getting farther and farther away from Izumo, especially the evening clouds in front, which have opened a long distance from the other ships.

The bloodshot Naoi Osa sat on the bridge of the battle ship on the Nagara, he had not closed his eyes for five hours, and he did not find any further signs of the enemy submarine, he continued to fight and searched the sea surface with a telescope to make sure that there were no enemy periscopes nearby.

"Anyway, they'll have to dive in during the day, and the threat can be lifted, right?"

He said to himself and decided to go back to his cabin to sleep.

At the same time, a drone flew over the head of the entire enemy fleet to conduct the first optical reconnaissance of the entire enemy fleet.

It can be seen that the Izumo is still moving unhurriedly, surrounded by the other three ships, but the formation is already very scattered. The length of this armored ship is shorter than that of Nagara, which is half the tonnage.

The other three escort ships are all narrow and long ships, and these ships sacrifice stability and protection, but emphasize high speed, which is not unrelated to the Japanese Navy's emphasis on combat tactics. Cheng Dayang fought with the Kawauchi for the first time, and he learned that its speed of 35 knots was faster than the full power speed of 419, but of course it was not very practical, because the speed of the last few knots was very slow. It's the Izumo, which looks slowly swallowed, but it looks flat and stable, with such a flagship overlord atmosphere.

"Command cabin, found a fence in the Izumo chimney."

The drone operator reminded Cheng Dayang.

"It's surprising that these old ships still have these things."

"It's okay, it's all an old design that guards against ten or twenty kilograms of small*, and it can't stop us from 100 kilograms*."

Chu Aiyun said on the side.

"Even if it is detonated early, it will affect the effect of the attack. Tell the operator to revise the previous plan, and the second * was also thrown in from the No. 1 chimney. The effect of the second piece must be guaranteed. ”

"Actually, it's not a bad thing, without these things, laser pointing is more difficult." Chu Aiyun said.

"When to attack?" The commissar asked.

"I remember what Director Lin said just now, don't overdo it. I want to ask, do you continue to play a play of Nagasaka Slope, and come to him with seven in and seven out? ”

Cheng Dayang suddenly gave Lin a little decision-making power.

"Don't be too brave, you just need to entangle with the enemy a little bit, you can attract the frigate and save someone from seeing * fall, but in any case, we can't expose it, at most let them see the periscope."

At the port side lookout post of the Nagara, a sailor is turning a 40x telescope mounted on a stand, searching the fan for the enemy's situation. This guy was sharp-eyed, and at a glance he saw something abrupt on the sea, and it took him 2 seconds to make a judgment, and then he immediately grabbed the intercom and shouted to the commander.

Yawning to bed, Naoi Toshio Osa, who was just about to go to bed, was once again startled by the terrible battle alarm and quickly changed his clothes and went to the bridge. As soon as I walked into the aisle, I felt that the warship was quickly turning around and heading east. The deputy captain took it upon himself to chase the submarine in the direction of the submarine, but saw that the periscope dived underwater and disappeared again.

419 infiltrated and found that the enemy ships turned to him, and immediately dived underwater, but when he was underwater, he could still grasp all the ships in the enemy's entire fleet at any time.

It can be seen that except for the leader Yukumo, who didn't seem to react for some reason, Nagara and Qiyun all turned around and came over this way. The trajectories of the two ships are clearly visible on the track self-plotter. I saw that they were ready to pounce and throw deep water*.

SCP-419 immediately descended to a safe depth at a 30° angle and rushed towards Izumo. Cheng Dayang's purpose was simple, to quickly change positions from one side of Izumo to the other, leaving the two more active enemy warships there to flutter blindly, and he could command all battles by maintaining periscope depth to the west of Izumo.