Cheng Dayang went down to the aisle and used the intercom to call the personnel of the combat department to quickly return to their posts. After waiting for most of the combat department personnel to go back into the submarine, the chaotic process wasted a full 10 minutes.

The submarine diesel engine slowly drove the blades to rotate and began to speed up, and the three-element subarray sonar on the side also returned to its state, capturing the sound of the enemy fleet due east.

While the electronic equipment measured the trajectory of the opponent's movement, the deputy commander also began to continuously track the target and solve the elements, which was a necessary step before the attack, and the efficiency increased dramatically compared with the previous chief command exercises. Everyone saw that the old Japanese plane launched an unprovoked attack, and now No. 419 is still in a difficult situation at home and abroad, and it must be carried out with a spirit of 12 points.

Cheng Dayang retrieved the narrow-band voiceprint map after the signal gain and compared it, and it was obvious that all the ships in the fleet to the east used the same type of steam turbine, and the rotation speed of the blades was characterized by warships. No sound signatures peculiar to diesel engines as auxiliary power have been found outside of the main engine. Soon the radar crew reported that one of the ships in the fleet was turning to the back of the fleet, and the rest of the ships were still maintaining their original course.

If those are really warships, judging by the size alone, it is simply the Maritime Self-Defense Force that has driven most of the capital ships. However, the opponent's machinery is quite outdated, and the matching of the speed of the main engine / the speed of the ship cannot correspond to all the warships in the database, let alone the characteristics of the 10th fleet of gas turbines. In fact, Cheng Dayang has been underwater for more than ten years, and has never heard a similar sound of a machine running at high speed, even the diesel units commonly used by civilian ships, the monotonous roar of its reciprocating stroke is quieter than these ships.

"* cabin. Tubes 1 and 2* are filled immediately*. ”

"I need the latest changes in target position and speed."

Underwater it was difficult to rely on sonar information to map changes in the opponent's position, but he now had a surface search radar on the enclosure at his disposal, ready to follow the location of a new target. The foredeck crew could not be emptied for the time being, and he felt that it was not safe to use *, so he chose to use *, of course, with the other intention of choosing to use *, because the launch* was not easy to be observed by the enemy; He still remembered what Lin Xiuxuan just said: You can't be exposed in advance in this "era"; Although Cheng Dayang's intellect rejects the absurd possibility of "time and space travel" at any time, the other side of intellect keeps repeating Hegel's old saying: existence is reasonable.

"No. 1* ready to go."

"No. 2* ready to go."

Thanks to the enemy's slow acceleration, Cheng Dayang still completed the "enemy tracking" in a mess; He ranged the target by radar, waiting for the opponent to come within range, during which time the submarine did not detect any search or irradiation radar used by the opponent. At this time, 30 minutes have passed since Lin Xiuxuan shot down that strange plane.

Driven by the diesel engine, the submarine No. 419 also began to accelerate slowly, Cheng Dayang did not know where to go, so he simply turned directly to the direction of the western continent, in fact, due to the failure of satellite navigation, he could not accurately find his position on the chart, and could only find the true north direction through the compass.

The submarine's westward route increases the angle between it and the opponent, but for a line guide* that can turn around and attack, the target will naturally fall into the firing feasibility zone as long as the target pursues it at high speed.

"Captain, the enemy has accelerated to more than 30 knots. It is already faintly visible in the northeast. ”

With such an old machine, that warship could run so fast? Obviously, the power part of the ship should occupy a fairly large cabin. If you compete in speed, the 419, which has a speed of less than 10 knots, will not be able to run anyway. In other words, unless the opponent's kindness suddenly turns around, this battle is inevitable.

Although Cheng Dayang's mind is still full of various questions, it does not prevent him from outlining his general situation: first, the current scene like a retrospective time and space is indeed real; Second, these Japanese, who used outdated armaments, not only opened fire, but were very decisive. If Lin Xiuxuan hadn't dragged himself to dodge just now, maybe he would have ...... right now

"Lin Xiuxuan, a shitty spy, has a sissy name, and the killing is quite neat." Cheng Dayang muttered in his heart, "No. 419 can't lose to this spy." ”

He didn't have a good impression of this intelligence director, he was said to be a son of a military family with a good background, and he had been a diplomat in European countries before, no matter how much he didn't know, in short, he was not very old and had a military rank, and he must have come smoothly, and the son of a miner like himself who saw the sea for the first time at the age of 18 was not a class at all.

Now he only knows that behind this mission brought by Lin, there must be a big secret hidden. Judging from the performance just now, Lin Xiuxuan obviously knew what was going on before everyone else on the boat. And the work of tracking down "Kasugamaru" is actually led by him.

"Lao Cheng, Director Lin is passing a word on it and asking you to check the 095 direction." Pan Chunhua, the political commissar holding the walkie-talkie, reminded Cheng Dayang's thoughts all of a sudden.

"Okay. Transmit the eyepiece field of view to the command module display. ”

Someone operates the photoelectric mast to rotate, and then adjusts the magnification. On the monitor, the boat in close pursuit was turning its rudder to one side, gradually reducing its broadside angle at extremely high speed. Judging by the action, it is clearly an attempt to use its speed advantage to outflank No. 419. At the same time, the ship was also firing Morse code phrases into 419 through a set of searchlights, a traditional means of communication.

The deputy captain next to Cheng Dayang translated and read out at the same time:

"The submarine ship ahead, which has entered the sea frontier of the Japanese Empire, immediately stops and reports its identity."

The warship's outflanking maneuver made its own side exposed to SCP-419, and the enemy's appearance was visible in the magnified image captured by the electronic periscope.

"Imperial Japanese Sea Frontier? What was this freak thinking? ”

Cheng Dayang asked himself if he recognized this warship, because this ship really didn't look like a warship. The two gun turrets on the bow are pointing in opposite directions and appear to be at least 127 mm in caliber, or larger. The huge hanger structure was exposed from the bridge and lay above the main gun, which Cheng Dayang judged to be a seaplane ejection/recovery device.

On the mast behind the bridge, there is a towering mast-like observation post, and a pair of long poles placed horizontally on the upper part of it are rotating, much like some kind of outdated conjunction-ranging device, and the signal lights below it are still flashing, the signal content is the same as the previous one, and the signal is repeated repeatedly, asking 419 to stop and report its identity.

Except for a round lateral positioning wire and a communication antenna as straight as a telephone pole, the first mast could not see all kinds of radio equipment necessary for the modern navy, neither high-speed navigation radar nor satellite communication equipment pointing to the sky.

Behind the mast was something even more bizarre - four chimneys of varying lengths were billowing black smoke, and it was clear that the ship was actually using some coal as fuel. It was followed by three main guns on the side and tail with different directions, as well as a second seaplane catapult, this time he didn't need to doubt the role of the catapult, because there was a seaplane parked on the huge shelf, almost the same as the one shot down by Lin Xiuxuan just now.

There is a Japanese naval flag fluttering in the vicious wind in the stern of the ship - sixteen rising suns with teeth and claws, this flag is no different from the naval flag of the Self-Defense Forces, but there is also a general flag, which is different from the plum blossom-shaped chief official flag of the Self-Defense Forces, which is still based on the pattern of the rising sun, but it is missing a corner, which belongs to the commodore level, indicating that the captain of this broken ship is a big sa.

"Which of you can identify this warship."

There was silence in the command cabin, although the picture had been enlarged very clearly, but still no one recognized the demon in the distance, perhaps many people have seen similar ships from video materials, but in the old black and white documentary films, this kind of broken ship is usually black, and this ship is light gray.

"How did you graduate from the Command Academy? It was impossible to identify Japanese warships? The acting captain angrily reprimanded, as if he could recognize it himself.

"I think," said Deputy Captain Chu Aiyun hesitantly, "it looks like a treaty-type cruiser produced after World War I." ”

"Can you say something useful? I would like to know the specific model and the name of the ship. ”

There was a long silence in the command module.

At this time, the officer on duty had already begun to use the method of fuzzy search of size and shape to quickly access the system's database.

In the identification database of naval ships, there has been a lot of useless ship information, some of which can even be traced back to 100 years ago; Although many of them are old ships that have been dismantled or sunk.

Since the use of computers on naval vessels, some useful and useless old information has been passed down from generation to generation, and electronic information does not take up space anyway, and there are usually people who regularly add newly launched ship identification information, and few people have eaten enough to delete it.

"Captain, look at this one." The shift leader said, and Cheng Dayang walked quickly behind him.

It was a black-and-white photograph of the Japanese cruiser Kawauchi in 1937, parked in the Sasebo Naval Harbor, which was roughly the same as the ship on the screen, with only minor details such as the location of gun emplacement No. 3.

There was a dead silence again in the command module, and the information showed that the warship was sunk in the Solomon Islands by American planes at the end of 1943.

"Captain, the other side continues to send signals: if it doesn't stop, it will fire."

"What's the distance?"

"20.7 km, but it's very fast, sooner or later it will catch up"

In just over an hour, the ship had cut the distance by nearly half, and it was clear that its firepower, at least in theory, could already pose a threat to the 419, and the Japanese above should have seen that the 419 could not dive.

"Captain, we are within range of their artillery, and it is expected that the adversary will soon be within range of ours* as well."

"If you dive, how long can you last on the battery?" Cheng Dayang asked, standing in front of the periscope.

"If you include the cooling pump power, it lasts up to two hours. In addition, gamma rays have just been detected near the main shield, which is not very good. There is now considerable risk in transferring the crew back into the boat. ”

"It seems that it is not possible to dive down, only a war."

Cheng Dayang walked to the edge of the electronic chart table, which showed 419, and the trajectory of the enemy ships that followed, if you adjust the magnification, you can also see more batches of targets, and the huge fleet left all the way south, without changing the course.

It seems that the Japanese felt that it was enough to send a 6,000-ton light cruiser, so the whole team had no idea of slowing down or turning, and the search radar could completely monitor/update all target movements before the curvature of the earth took effect. The current situation is objectively favorable to Cheng Dayang, and it is difficult for No. 419, which is riddled with holes, to cope with so many targets at the same time, but fortunately, only one ship came.