Tang Feng also heard the movement outside the submersible, he checked it out through the camera and the observation hole, and found that it was just a big fish, and he slapped the outside of the submersible with his tail, and the submersible itself was still very strong.

"What are you yelling for?" Tang Feng reprimanded Wang Yueshen.

"I can't go, I'm claustrophobic. Wang Yueshen shuddered.

The submersible's illuminator has been turned on, and you can see more than ten meters below, but with this light contrast, it seems that the darkness in the depths of the sea is everywhere.

"If you have claustrophobia, you don't say it early. Sun Xiaoyu scolded.

Tang Feng had no choice but to manipulate the submersible to float and throw Wang Yueshen back on the boat. Under the gaze of the captain Shangguan Longdu and others, the submersible sank again.

Because they want to sink too deep, they sink without cables, and when they get to the bottom and want to come up, there are two ways, one is to drain the water in the buoyancy cabin, and the other is to start directly, which may be a little different from military submarines.

In the submersible, only Tang Feng and Sun Xiaoyu were left, lonely men and widows, and the atmosphere suddenly felt a little different.

After diving a few hundred meters, it was even more lonely after the complete darkness outside. In the vast deep sea, the light only shines out a few dozen meters, and the rest is black, occasionally colorful fish swim by, and some fish even curiously circle around the submersible.

"It's time to do something. Sun Xiaoyu said.

"What are you doing?" said Tang Feng.

"Of course it's what needs to be done. Sun Xiaoyu said.

Half a day later, Sun Xiaoyu didn't take off his clothes or anything, but observed the deep-sea landscape outside. In the sea below dozens of meters, most people have never been there, and Tang Feng and Sun Xiaoyu are no exception.

"You big liar. Tang Feng glanced at Sun Xiaoyu's chest.

The two of them are just lonely nonsense, of course, it is impossible to do anything so quickly, after all, this is the deep sea, and if there is any problem, they may also die, so the two are more cautious.

The speed of descent is not slow, almost a meter per second. An hour later, they reached a depth of more than 3,000 meters, and the submersible did not make an abnormal sound, indicating that the quality was really passable.

A submersible that doesn't look too big, worth tens of millions, of course, there are still high-tech, such as balance adjustment, space temperature adjustment and ventilation.

"It's so quiet here. Sun Xiaoyu sighed.

"I'm not afraid of being heard. Tang Feng also said.

Sun Xiaoyu smiled, took off her underwear directly, and deliberately turned around twice in front of Tang Feng before changing into loose sportswear.

"Don't wear it, wait until I take it off. Tang Feng said.

"Get out. Sun Xiaoyu scolded.

It is not a busy task for two people to operate the submersible, because the submersible is basically descending on its own now, just in case something happens, you can adjust it.

For example, if the submersible is obviously unable to withstand the pressure of the deep sea, if it continues to sink, it will be looking for death, and of course it will have to float back.

After another hour, they reached a depth of seven thousand meters, and by this time, the submersible occasionally made some sounds, but it still felt solid.

"Tang Feng, how about the submersible. "The communicator came, and the voice of Shangguan Longdu above the sea was heard.

"Fortunately, seven thousand meters, only occasionally began to make sounds, and it seems that more than 10,000 meters is completely fine. Tang Feng said.

This situation is even better than Shangguan Longdu's judgment. Shangguan Longdu believes that the submarine should have some pressing sounds when it is 5,000 meters, but the appearance of this sound does not mean anything, the ship is driving on the sea and mountains, and it is constantly making sounds.

Steel is something with great toughness and elasticity, and slight displacement does not affect safety.

Their communication is through ultrasound, and the communication efficiency is not high, but it is enough, after all, there is no need to transmit a large number of scientific data and images, just a call.

At this moment, the speed of the submersible's sinking suddenly increased, and the creaking sound made by it became sharp.

"Tang Feng Tang Feng, come and see, what's going on. Sun Xiaoyu called Tang Feng to look at the display screen.

Tang Feng hurriedly went over to take a look and said, "It's deep." ”

Falling deep is also a term for Tang Feng and Shangguan Longdu's learning. For submarines, it is a very dangerous thing to fall deep.

The so-called depth drop is actually a sudden change in the density of the seawater. The density of seawater is not a fixed value, but varies due to uneven heat and cold or different salt content.

When the submersible suddenly enters the low-density sea area, the originally balanced buoyancy will directly become smaller, and the submersible will also accelerate the sinking speed. Many military submarines have encountered this kind of crisis. The general submarine, that is, the sinking depth of several hundred meters, if it suddenly falls deep and cannot float in the seawater, then it will be flattened by the terrifying pressure of the deep sea, and the people inside will naturally die.

The depth of the submarine is limited, so it is dangerous to fall into the depth.

But Tang Feng and them are just to go to the deepest part of the sea, and the design pressure of the submersible is theoretically sufficient. So it's really nothing to be afraid of.

"It doesn't matter, we're sinking, but the speed of descent is too large, and it will still increase the risk a little bit. Tang Feng said. He put his hand on Sun Xiaoyu's shoulder and gently pinched Sun Xiaoyu's earlobe.

"Yes. Sun Xiaoyu said. Sun Xiaoyu did not speak out against Tang Feng's actions, in this case, it was useless to object, she couldn't poison Tang Feng.

If Tang Feng died, she would be left alone, wouldn't it be even more lonely.

Because of the fast sinking speed, the creaking sound of the submarine is also quite frequent, which sounds scary.

Fortunately, after ten minutes, the speed at which the submarine sank suddenly slowed down and returned to normal.

By this time, they had reached a depth of more than eight thousand meters. The average depth of the Mariana Trench is just that, but they are now in the Challenger Abyss, almost more than 2,000 meters from the bottom.

After another half an hour, the submersible finally fell to the bottom of the sea.

Because of the high pressure, the bottom of the sea was quite hard, but it brought up a small amount of sand and quickly returned to normal.

After waiting for a while, all the data of the submersible stabilized. They used the relevant instruments to explore the surroundings, but they didn't find anything, not even a small fish or shrimp, it seemed that in the entire trench, there was only Tang Feng and Sun Xiaoyu, and the submersible that protected them.

According to the deep sea as it is now known, the Mariana Trench is almost devoid of life.

"Ten thousand and seven hundred meters. Sun Xiaoyu looked at the display screen and said.

"It's not the deepest yet. Tang Feng said.

"Cut. The entrance doesn't have to be in the deepest place. Sun Xiaoyu had a variety of charms, and Tang Feng glanced at him.

A woman like Sun Xiaoyu, with a mature mind, a youthful body, and an open language, is very tempting. Of course, the main thing is the figure, with slender legs, full chest, soft waist, and fair skin.

In particular, Sun Xiaoyu was sitting there in loose clothes, and Tang Feng was standing, in an excellent position.

Tang Feng looked at it and said, "What you said is also very reasonable, it doesn't have to be in the deepest depths, but there are greater possibilities." ”

Sun Xiaoyu saw Tang Feng's gaze, did not dodge it at all, and said, "Is it good-looking?"

Tang Feng subconsciously said: "Good-looking, white, big." ”

"Hehe, not only is it white and big, but it's also soft. Sun Xiaoyu pressed a button, grabbed the steering wheel, and began to start the submersible.

Before they came, they already had a good understanding of the Mariana Trench, and the deepest known depth is a little more than 11,000 kilometers. And they are still more than 300 meters away from this data, which shows that the challenger abyss is not flat.

Now that they have arrived here, they naturally want to explore the challenge abyss.

Of course, there are dangers, but the potential benefits may also be enormous.

The Challenger Abyss is only a small part of the Mariana Trench, and they explored one side for three days, and they found nothing, just some large whale shark bones or something. It is also normal for the upper fish to rot and sink after the death of the upper fish.

"Do you want to go up and have a look?" asked Sun Xiaoyu.

"Okay. Tang Feng was also helpless.

Since nothing has been found in the deepest depths, there may be some discoveries elsewhere in the Mariana Trench.

It was still Sun Xiaoyu who drove the submersible, and Tang Feng stood and watched.

With the previous three or four days of exercise, Sun Xiaoyu has been very proficient and steady.

"Tut, Sister Xiaoyu, don't say it, you are an old driver who drives a submersible, and you are also a good hand. Tang Feng praised.

"I'm driving you, and I'm also a good hand, do you want to try it. Sun Xiaoyu said casually.

"Okay. Tang Feng also said casually.

In the past three days, they were busy exploring the challenger abyss, at most, they touched each other twice, and there was no particularly outrageous move, this time they began to float, they relaxed slightly, and began to talk again, and even Tang Feng grabbed Sun Xiaoyu from behind Sun Xiaoyu's chair and rubbed it a few times.

The speed of floating is relatively sinking, which is naturally a lot faster. In just half an hour, they managed to rise to an altitude of nearly three thousand meters and came to the normal depth of the Mariana Trench.

Compared to the Challenger Deep, the entire Mariana Trench is too big, and they can't search it for a while, so they don't need to worry.

But as soon as they stopped on the bed at a depth of more than 8,000 meters, a huge black shadow entangled the submersible, and then gradually tightened.

The submersible creaked.

"It's the king squid. Tang Feng shouted.