Seeing that everyone had fixed the oxygen cylinders, the shark said to everyone seriously: "Diving is actually an extremely dangerous training subject. Our Frogman Team has been established for ten years, and drowning happens from time to time every year.

At least fifteen frogmen have become martyrs. Everyone must put safety first. First, go into the water slowly and let the body slowly adapt to the water pressure. Secondly, you must always pay attention to the changes in the pressure gauge of the oxygen cylinder.

Do not cut off oxygen underwater. If you are diving in the deep sea, you should also prevent darkness underwater.

When encountering strong water flow, you should avoid it quickly, and also prevent it from being attacked by sharks. Beginners should pay special attention to it. When water comes out of the deep sea, you must be slow. Let the pressure inside the body gradually balance the pressure outside the body.

If the water is too fast, you will feel ear pain. If the ear pressure balance problem is serious, it will also cause the eardrum and ear drum to be injured. If the rising speed exceeds the free rise speed, it will be extremely terrifying. The consequences are very terrifying, that is, the lungs

The volume of gas suddenly expands, causing lung explosion."

"Blow up the lungs?" After hearing the shark's words, everyone couldn't help but take a breath.

"The lung explosion is because the pressure in the lungs suddenly decreases, which shows a sudden release of physical phenomenon. Just like the firecrackers we set off when we were young, it was finished with a "bang". Even the fish in the sea are not spared.

Often see some fish with abdomen bursting on the sea, all of which are killed by lung explosions. In addition to the more powerful lung explosions, there is also a gentler one, that is, the legendary decompression disease, and every new diver will

It should be changed because at the beginning of training, new divers will have different courses

Decompression disease, which usually occurs within 2-48 hours after floating onto the water surface. Decompression disease includes many different symptoms, such as joint pain, limb numbness, or large erythema on the skin, which may be decompression disease.

The symptoms of severe symptoms will leave sequelae of decompression disease. If you suffer from sequelae of decompression disease, you will not be able to dive for the rest of your life. Therefore, we must be extra careful to prevent the occurrence of decompression disease. Let’s start going into the water.

"The shark's words were a bit alarmist, making people doubtful.

I thought I could become a frogman soon, but I didn’t expect that the road to becoming a frogman is so tortuous. In order to become a frogman smoothly, everyone has made every effort. Be extra careful when going into the water. Never come here.

A sequelae of stress reduction, let alone lung explosion.

The shark continued: "As a frogman, in addition to taking the risk of physical injury, the most important thing is to endure loneliness, because the vision is blurred under five meters, and the breathing is a sense of oppression, fifteen meters

Below, the light can no longer be reached, and the eyes will be dark. Everyone will obviously feel the pressure on their chest and breathing will become difficult. In this environment, everyone will feel a sense of fear. Therefore, our first dive should be on the 15th.

More than meter, wait until you slowly get used to it before diving deeper, our deep diving training ground is deep

It is 80 meters long, and there are some plastic balls tied at the bottom of the water. If you can dive to the bottom of the sea, you can take a plastic ball, which means you have become a qualified frogman. I don't advocate for you for the first time diving.

If you dive to the bottom of the water, you can dive to fifty meters deep. I bet that no one among you will dive to the bottom. If you don’t believe it, you can try it when you dive next time. Now we are going to go into the water in groups of two.

Note that each team member cannot throw away his teammates. If one person does not dive, the other person must stop."

Sun Jiashu and Zhang Ershun were in the same group. For safety reasons, Sun Jiashu repeatedly explained what Zhang Ershun should pay attention to. Zhang Ershun nodded repeatedly. The two of them grabbed the oxygen tube with their mouths and pulled their hands to dive into the water. In the past, their mouths were used to eat, but now they use them.

I came to inhale. My nose used to breathe air, but now it is useless. If water is in the mirror, I need to suck out the water with my nose. The function has changed. I feel a little uncomfortable when I get a sharp water.

The man held hands and got used to the water for a while, and then he started to slow down.

As the shark said, at a depth of five meters, the two were able to see each other clearly. As the depth continued to deepen, their vision gradually blurred. After a while, the two fell into darkness and their bodies seemed to be

It was as uncomfortable as it was wrapped in a layer of plastic film. The ear drums were slightly painful, and their breathing became more and more rapid. Sun Jiashu wanted to stop and rest for a while, but he didn't expect that Zhang Ershun pulled him down and kept diving. The water pressure was for him.

It seemed that it did not exist at all, and Sun Jiashu couldn't help but secretly admire it.

After diving down for a while, Sun Jiashu couldn't help it. He felt like a big rock was pressing on his chest. He hurriedly balanced the pressure inside and outside his body. Then he felt a little comfortable. Look at Zhang Ershun, he didn't want to stop at all.

Meaning, Sun Jiashu had to passively follow Zhang Ershun and dive downwards.

In the monitoring room, Shark and Qin Jian were staring at the screen. Most of the players had exceeded 30 meters deep, which means that everyone had passed the first dive. Most of the players had slowed down their dives, and some had already

It seemed that it was preparing to dive upwards, but what made the shark feel incredible was that Sun Jiashu and Zhang Ershun had dived to fifty meters deep. Although the diving speed was slower than before, they showed no sign of stopping.

, still approaching sixty meters.

The Shark felt a little relieved. It seemed that these team members did not disappoint him. The first diving exceeded fifty meters. I remember when he dived for the first time, he could only dive for 49 meters and could no longer dive. He was very excited.

He watched Sun Jiashu and Zhang Ershun move towards the depths with vigorous eyes.

It has been more than 60 meters, and the shark's relief just now began to become worried. Sun Jiashu and Zhang Ershun are both novices. If they continue to dive, they have no experience in how to deal with emergencies. Shark hopes that they both stop diving, but Sun Jiashu and

Zhang Ershun had no intention of stopping.

Sun Jiashu and Zhang Ershun were already close to seventy meters, and sweat couldn't help but seep out of the shark's face. He shouted to the microphone: "Sun Jiashu, Sun Jiashu, please stop and stop diving down."

When Sun Jiashu heard the shark call, he pinched Zhang Ershun's hand, meaning that he would stop because he could not talk in the water and could not see it. He had to use physical touch to convey information, because there was no communication in advance, Zhang Ershun did not

Understanding what Sun Jiashu means, he thought Sun Jiashu encouraged him to continue diving and dive deeper.

The shark watched Sun Jiashu and Zhang Ershun crossed the seventy-meter mark line and continued to sprint towards the eighty-meter mark line. He was so scared that his face turned pale, and his voice changed: "Sun Jiashu, I order you two to stop immediately

.”

Sun Jiashu stopped when he heard the shouts, but Zhang Ershun did not stop. He kept pulling Sun Jiashu to calm down. His feet had already touched the bottom of the water. The shark said that it was impossible for a first-time diver to dive to 80 meters deep.

Zhang Ershun easily reached the point. At this time, Zhang Ershun felt extremely stuffy. The strong water pressure seemed to press him into a piece of paper. Although his heel had already hit the bottom, it was extremely difficult to bend down. There were many plastic balls tied to the bottom of the water.

Only by bringing the plastic balls out can they prove that they dived to the bottom, and in this case, the shark will lose the bet.

Zhang Ershun bent down with all his strength. His hand touched a plastic ball, and threw away Sun Jiashu's hand and untied the rope to fix the plastic ball. After some effort, Zhang Ershun untied a plastic ball and finally succeeded.

It was pitch black all around, and suddenly an endless sense of fear came towards Zhang Ershun. Zhang Ershun felt that he wanted to leave him, so he hurriedly reached out to grab Sun Jiashu's hand, but grabbed a blank. At this time, Sun Jiashu was his only life-saving

Grass, this time he caught the sky, felt a threat of death, and he could even see his father, who had been dead for many years, waved to him not far above his head.

"Son, come here." An old voice echoed in Zhang Ershun's ears.

"Dad, why are you here? Wait for me." Zhang Ershun's body slowly rose, and quickly floated up while rubbing Sun Jiashu's back.

Sun Jiashu felt something touching his back. He knew it was Zhang Ershun, so he hurriedly reached out and grabbed it, but grabbed it. He only heard a fearful shout from the headset: "Sun Jiashu, grab Zhang Ershun quickly, don't let it go.

He floated up."

Sun Jiashu opened his eyes wide and searched. There was darkness around him. It was impossible for him to be Zhang Ershun. Just as he was stunned and searching, Zhang Ershun was already a few feet away from his head.

"Sun Jiashu, rise quickly, Zhang Ershun is above your head, hurry up and catch up with him." The shark loudly reminded Sun Jiashu.

After hearing this, Sun Jiashu hurriedly pedaled and floated up. As long as it was going up, there was nothing wrong. From the surveillance screen, Zhang Ershun kicked his feet. It seemed that he wanted to leave this place of fear as soon as possible, and the rise was very fast.

Although Sun Jiashu tried his best, the two were always only one meter apart.

"Add another move." The shark's voice was hoarse. If Zhang Ershun was not stopped in time and surfaced at this speed, Zhang Ershun would undoubtedly die.

Sun Jiashu is now willing but not able to do it. Although he felt the water above his head rolling and knew that Zhang Ershun was above his head, he could never reach out to grab him.

Now it is only thirty meters away from the water surface. If Zhang Ershun cannot be stopped within ten meters, Sun Jiashu must give up, because at this speed, Sun Jiashu will definitely die if he comes out of the water.

"Hurry, hurry up, Sun Jiashu, it's too late." The shark was going crazy.

Sun Jiashu knew that it was already in a moment, so he hurriedly threw away the oxygen cylinder. It was so stupid. If he had thought of throwing away the oxygen cylinder earlier, he would have caught Zhang Ershun now, because the oxygen cylinder had a certain weight and had removed the oxygen.

The bottle must rise faster. At this time, Sun Jiashu has already made his promise.

"Sun Jiashu, you're looking for death, stop quickly." The shark was going crazy when he saw it. In his opinion, a tragedy was about to happen...
Chapter completed!