When the time was still two hours ago, a small meeting was held in the Liyan small submarine. The meeting was about whether to start the submarine engine. After the meeting, Qin Zhao decided to turn on the engine and set sail for the direction of the explosion in the distance.

The explosion happened 20 minutes before the Liyan left. The direction was south by West. The specific deviation was degrees. The compass on the submarine was inaccurate. It was about 15 degrees. The submarine's transmitting antenna is damaged, so it can't receive satellite signal and accurate azimuth data.

In addition, any mode of communication is scrapped with the damage of the antenna.

It's a tragic thing.

The antenna was not damaged by the electromagnetic discharge, but when the Liyan submarine capsized. At that time, no one can remember clearly, but it is certain that the Liyan number has turned over at least three times, so it is not unusual that the antenna, a precision component, has been damaged as a result. Not to mention that everyone expected it, but also have psychological preparation.

However, it does not matter whether the degree of the declination is accurate or not, because the location of the explosion is obviously in the middle of the Caspian Sea, where the "pioneer" created the vortex. It's turbulent and a mess now. There are many warships moored around, so Liyan can get there as long as it's roughly in the right direction and walks with its eyes.

So the Liyan left, abandoned Mike and went to the middle of the Caspian Sea, totally unaware that the thunder had driven the Guihai to their original location to find them.

After Jiang Jian and his returnee found Mike, they submerged the submarine.

Mike looked at the computer in the control room and said, "the Liyan should be 1500 meters below sea level."

"Are you sure?" Jiang Jian asked.

"Of course." Mike said, and then with his hands up and down, "when we came up, we were holding 1200 meters of wire rope, and then we all pulled up to the limit, and there were still 300 meters left."

Jiang Jian laughed twice and said, "the submarine we bought is made of wool titanium alloy by Ukrainian shipyard. Its strength is very high, but its ultimate depth is only 800 meters. If you stay in the sea 1500 meters deep for a month, your Liyan number will be crushed into a pool of iron ore."

When Mike heard this, he was very surprised. He said, "how can it be? We obviously pulled the wire rope to 1200 meters, and then there were hundreds of meters left on it."

"Are you sure the wire rope is straight?" Jiang Jian asked.

"Nonsense, of course it's straight!" Said Mike.

Although Jiang Jian was alienated by candy when he was in University, and then went to the power bureau, he was still a top student in Mathematics in high school, including physics, and he was also very proficient.

At the moment, he didn't say anything, just laughed, took out a pen, and drew a wavy line near the upper edge on an upright A4 paper. "This is the sea." Jiang Jian said. Then he drew a lying down oval the size of a coin near the bottom edge of the paper. "This is the Liyan submarine." Jiang Jian said. Next, Jiang Jian drew a thin line from the ellipse representing the Liyan submarine. This is a hook curve shaped like an exponential function. The curve extends to a position about 9 cm from the sea surface. Then Jiang Jian drew two people here. "This is you, monk Sven, and this curve is the wire rope you are wearing."

Mike looked at the picture in a daze. He didn't speak. He obviously didn't understand.

Jiang Jian said: "now, you mark the length of the wire rope and the depth of the submarine as you want to see if you are right."

Mike hesitated for a moment, probably thinking, and then he picked up the pen.

Mike first marked a 1200 meters on the hook curve, and then drew a dotted line from the sea to the ellipse. He marked the dotted line 1500 meters.

"OK, stop." Jiang Jian said, "now you match these two parameters to see if they are reliable."

Mike nodded and measured with a ruler beside him. Then he just wanted to work out the ratio of the hook curve to the dotted line to see if it was roughly in line with the parameters he marked, so he gave up, because it was obviously not right. If the hook curve was straightened, it would be too long than the dotted line. If it was not calculated, the eye could see it.

"Oh, I see, I see." Mike couldn't help speaking English.

With a smile, Jiang Jian took the pen in Mike's hand and drew an arrow from the middle of the hook curve to the right. Then he wrote an F at the top of the arrow and said, "now, you understand."

"Mike said:" after pulling the rope to eight hundred meters, it's the thrust of the water that we can't go up! So our 1200 meter rope didn't reach the surface of the sea. "

Jiang Jian still laughed and let Mike sigh for a while.

Then Mike patted his thigh and continued to sigh: "no wonder I think it took me a long time to swim Shanghai noodles. It turns out that I didn't swim vertically, I swam obliquely!"

Jiang Jian continued to smile: "that's it.""Will the eye mark sink deeper there?" Mike began to worry about this, because if the Liyan sank deeper, the water pressure would be too high and the situation would be very bad.

"Don't worry, it won't be." Jiang Jian said.

Mike thought about it and said, "Jiang Jian, although I believe you very much, I still don't understand. Can you explain it?"

"Of course, it's very simple." Jiang Jian said, "you see, first of all, you've been here for more than a month, and you're still OK, which shows that your eye number is still in the safe depth range. Secondly, you need to know that the capacity of the submarine's water tank is actually set, that is, the degree of submergence is set. Unless the water in your water tank leaks into your cabin and squeezes out all the air in your cabin, the Liyan will continue to sink. "

"Well, what's the depth of the returnee now?" Asked Mike.

"The ultimate depth is 800 meters. Of course, it can be a little deeper. The design depth of the submarine is 900 meters, but it is no longer within the scope of safety." Jiang Jian said, leading Mike to see the porthole of the control room, where you can see the scene outside. It's the blue water illuminated by LED spotlight, and there are colorful deep-sea fish, most of them are small and flat, and there are some beautiful and dangerous things, jellyfish, which stretch their slender tentacles, like the hair of a beautiful woman.

Instead of using a kerosene generator, Liyan directly relies on the electricity from the electromagnetic woman. Her electricity is more stable than that of the generator, and it is light and silent.

"Do you smell the smell of suicide?" Together from the porthole looking out at the sea, electromagnetic female said, her eyes are filled with worry.

"I said that we should go back to port Grozny and meet my sister-in-law first." Wang said he didn't want to take the risk in the middle of the Caspian Sea.

"Don't worry, we are safe now. It's the same to go back earlier and later." Said Shang.

"Sven, if there are no warships around now, we will jump into the fire pit by ourselves." Electromagnetic female said.

Shang Siwen laughed, "there must be warships around the narwhal. Don't worry, brother Qin thinks so too." He said, and then looked at Qin Zhao in the distance. Qin Zhao is reading a book on his desk, a novel describing ancient history. He has been fascinated by it these days, which is very interesting according to him.

When Qin Zhao heard what they said, he got up and went to them. Qin Zhao said: "according to the habit of human thinking, the army will certainly step up its surveillance of these two big men. There is almost no possibility of counterexample."

"But the narwhal is so powerful that I don't think there are any weapons against it at present. Maybe the army will stay away from such things." Wang said.

Qin Zhao thought for a while and said, "philosophical thinking."

"Well?"

"Let me ask you a question. If there is a big meteorite in space, it will hit our earth, and this big meteorite will hit your home impartially. It's a very spectacular scene. Do you think it's better to watch it under your home, or to watch it with satellite camera?" Qin Zhao said.

"Of course, I'll get out of the danger zone of meteorite impact, and then watch it in other near and safe places on the ground." Wang said.

Qin Zhao smiles. A few months later, his smile is full of tired shadow. He says, "but if you change your way of thinking, if we found this meteorite with satellite at the beginning, we can detonate it in advance before it falls to the ground, so that you don't have to buy a house again and become a family."

Wang Zhesi nodded his head and said, "Oh - so what the army does now is to observe the narwhal, and then destroy it before it falls down."

Like the "broken Queen" narwhal submarine, Guihai also determined a rectangle, and then began covering search from the corner of the rectangle. In order to expand their horizons, five members of the thunder team put on deep-sea diving suits and went outside the submarine with wire ropes. Each of these six people has a high-power LED searchlight. They are located in the upper, lower, left, right, front and rear directions of Guihai submarine, so that they can observe everything nearby. But they searched for hours near where Mike was out of the water, and found no trace of the Liyan number. And those six led searchlights have become hot because they have been bright for a long time.

"Now I'm starting to wonder if the Liyan will be in a deeper position." Mike said, of course, he didn't know that Liyan had already left, so he was puzzled that such a careful search was still fruitless.