Seeing that it was the evening of the ninth day, Xu Zhi helped Xu Bicheng clean up, and suddenly said to Huang Minghui: "There seems to be a storm on the sea, how can we go back tomorrow!" ”

"Huh? Wind...... Storm? Huang Minghui was stunned, strange, "How do you know?" Weather forecast? ”

"I have old cold legs!" Xu Zhi smiled, "It's already sour now!" ”

After speaking, Xu Zhi hid in the room again, read a book, and listened to the sound of the surging tide outside setting off waves rushing into the bottom of the sea. Pen ~ fun ~ pavilion www.biquge.info

However, it was only more than forty minutes, Xu Zhi's face suddenly changed, he put a navigation diary in his hand on the table, he listened to it for a few more minutes, and hurriedly ran out of the room, shouting: "Instructor, instructor......"

"What's wrong?" Huang Minghui was chatting with a naval soldier at this time, and when he heard Xu Zhi being so nervous, he hurriedly agreed.

"Quick, report to Captain Wu quickly......" Xu Zhi was a little anxious, "There is an unknown sound wave on our submarine, this sound wave has a fixed rhythm, it may be a signal!" ”

"What?" Huang Minghui was confused and didn't know what Xu Zhi was talking about.

But the naval soldier understood as soon as he heard it, and hurriedly asked: "You said that we have a sonic transmitter on the boat and are sending signals outside, right?" ”

"Yes, yes!" Xu Zhi nodded, and at this time, he thought of what Xu Bicheng said earlier, and hurriedly added, "This may be the reason why the submarine dived into the sea in advance, right?" ”

"Quick!" The navy soldiers were in a hurry and hurriedly rushed to the submarine conference room with Xu Zhi and Huang Minghui.

The submarine's conference room is quite large, it is a room large enough for a dozen people to have a meeting, at this time there is some smoke in the room, Wu Hairong is frowning and discussing something with a few officers, and when he saw Xu Zhi and them coming, he asked unhappily: "What is the matter?" ”

"Report to the captain!" The naval soldier said loudly, "Xu Zhi found that there is an unknown sound wave transmitter inside the submarine, which seems to be sending a signal to expose the location of my submarine!" ”

"What?" Wu Hairong was taken aback, he jumped up from the sofa with a "whew" and shouted, "Where??" ”

"Report to the captain!" Xu Zhi took two steps forward and said, "I just heard it, but I can't find the specific location yet!" ”

"What? You...... What do you hear? Deputy Political Commissar Yu Feiyang raised his eyebrows and asked in surprise.

Xu Zhi had no choice but to reply stubbornly: "Yes, political commissar, I heard it!" ”

"You're not kidding, are you?" Wu Hairong couldn't cry and laughed, and said, "How can you hear the signal?" ”

"My hearing is unusual!" Xu Zhi replied, "I've been reading in the submarine's reading room, and about seven minutes ago, I heard some signals that were different from the submarine's usual sounds, and the wavelength of these signals was short, so they should not be able to travel far, and they are definitely not the signals commonly used in submarines!" ”

"Captain Wu......" Huang Minghui also said, "This is one of the purposes for Chief of Staff Ye to let Xu Zhi come to the submarine to study!" ”

"Good!" Wu Hairong thought for a while, and said to an officer next to him in the spirit of preferring to have it before than to believe it, "Go and turn on the signal detector and see if you find anything?" ”

Ten minutes later, the officer returned, shook his head and said, "The communications corps didn't find anything unusual!" ”

"Impossible!" Xu Zhi shouted, "Let him check with high frequency!" The frequency of these sound waves is high! ”

"High frequency?" The officer, who clearly understood the technique, frowned and asked, "How tall exactly?" ”

Xu Zhi shook his head: "I don't know, I just think the frequency is very high." ”

"Let's go!" Wu Hairong thought for a moment, got up and said, "Let's go to the command cabin, hold here for three days, and we can't hold back the enemy's plans, and we can't guess why the commander of the military region asked us to dive early!" ”

Xu Zhi also came to the command cabin, which contained a lot of instruments and instruments, as well as a periscope leading to the bridge. At this time, in addition to the person on duty in the command cabin, there was a young man with glasses and a white face, staring at a piece of equipment, looking at the green dots beating inside, and the rotation in circles, with a flat expression.

"Xiao Zhou, turn up the frequency of the detector and see if you can find the sound signal!" Wu Hairong ordered without saying a word.

"Yes, Captain!" Xiao Zhou didn't dare to slack off, so he answered and twisted a knob, but when the knob was twisted to the end, he didn't find anything abnormal.

Xiao Zhou raised his head and said, "Report to the captain, no abnormalities found!" ”

Xu Zhi looked at the sonometer, listened to it again, and asked, "What is the highest frequency now?" ”

"About 3,000 kHz!" Xiao Zhou is very familiar with the data, and replied without thinking.

"Can't it be any higher?" Xu Zhi thought for a moment and said, "For example, ten thousand khertz? ”

"Do you know what a fluctuation of 10,000 kilohertz is?" Xiao Zhou scoffed a little and asked rhetorically.

"Laser!" Xu Zhi also came prepared, although his tone was a little tentative, but his words were affirmative.

"Since you know that it is a laser, you should know that our sonic instrument cannot detect lasers!" Xiao Zhou said, "Moreover, I don't think that in China, who can send a laser signal from a submarine!" ”

"No, no......" Xu Zhi shook his head and said, "This is different from lasers, it is just a short-wave signal, and the frequency is very high!" ”

"That's even more unlikely!" Xiao Zhou shook his head, "If this kind of sound wave generator exists, then its volume must be very large, and we can't find it!" ”

"Alas!" Xu Zhi saw that he couldn't convince Xiao Zhou, sighed, his eyes rolled sharply, and listened carefully to the sound wave, but this sound wave seemed to have an interference function, and Xu Zhi's hearing could only know that the signal came from the submarine, and he couldn't detect where it was.

"Not good!" At this moment, a crew member suddenly shouted not far away, "Captain, the sonar has detected an anomalous target approaching us quickly!" ”

"Where??" Wu Hairong was even more surprised, and hurriedly ran over to check, and sure enough, above a screen, where the edge was, a flickering green dot was speeding up.

"All ships on alert!" Wu Hairong immediately issued an order, "The crew is in place, correspondent, contact the command!" ”

A few minutes later, the correspondent said: "The command replied that the military exercise had begun nine days ago, and nothing else had been said!" ”

"Fooled!" Wu Hairong said angrily, "No wonder you want us to dive to the bottom of the sea, it turns out that you want to catch us off guard." Listen to my commands......"

Wu Hairong then issued a series of orders, seemingly to get rid of the target and approach. It's a pity that after being busy for almost an hour, the target did not get rid of it, but got closer, apparently there was a signal that exposed the location of the submarine.

"Xiao Zhou!" Wu Hairong shouted, "Isn't there a way to detect the signal?" ”

"Report to the captain!" Xiao Zhou replied, "The technology used by the enemy exceeds the range that our submarines can detect, and there is no way to detect it!" ”

"Hmph, what kind of bullshit technology, it's not as good as human ears!" Wu Hairong couldn't help but scold.

Xu Zhi was beside him and whispered: "Captain, is your evasion a symptom but not a cure, or you must first find the source of the signal!" ”

"The deputy commissar has gone!" Wu Hairong said lightly.

Xu Zhi looked left and right, and sure enough, just as Wu Hairong was giving the order, Yu Feiyang quietly left the command cabin, and really took some crew members to find the source of the signal.