Zhuangyan discovered that these strange bubbles did not emerge from the surrounding seabed silt or coral bushes, but emerged from the device behind Zahad's scuba lungs!

It was the diving system that seeped water!

This thought immediately floated through the solemn mind, making people think about it and couldn't help but feel a chill.

This is a deadly situation for those who use fully enclosed diving gear.

Fully sealed respirators can be divided into manual and fully automatic. Usually, fully automatic sealed respirators are called eccr.

Semi-closed recirculators and fully-closed recirculators are two completely different concepts in design. The manual and fully-automatic principles of fully-closed recirculators are the same, except that they are manually and electronically fully automatic control gas recharge valves, adjust the oxygen concentration of the circulation system at different depths, and stay underwater for a longer time.

The semi-closed respirator uses high oxygen gas at different depths and can only use fixed oxygen partial pressure, while the breathing circuit is not completely closed, and the gas will be discharged after a certain period of time.

In the past, open scuba diving was inhaled through gas cylinders, and the air was directly exhausted to the sea after the human body's oxygen metabolism. During the oxygen metabolism process, divers only used about 5-6% of the oxygen in the gas, and the remaining oxygen, together with the carbon dioxide produced during metabolism, were discharged together.

The fully enclosed respirator is a respiratory circulation circuit system, which consists of our lungs; gas supply bottles (pure oxygen and diluted gases); breathing air bags; pipelines; carbon dioxide suction buckets; control parts (electronic valves, oxygen sensors, computers, etc.).

The gas continuously flows in one-way circulation in the circuit. The oxygen used by the human body is supplemented from pure oxygen cylinders. The task of the carbon dioxide absorption bucket is to purify and absorb the co2 in the exhaled gas of the divers in the divers, so as to provide the divers with breathing again and save the divers' breathing volume. The principle is very simple.

Because of this design principle, the viper-e2000 scuba will not produce bubbles, and all exhalation and inhalation will be completed in one system without any leakage.

Now there are bubbles oozing out from behind Zahad, which means that this closed scuba is leaking.

The viper-e2000 loading device hanging on Zahad's back is filled with carbon dioxide absorber.

Once leakage occurs there, extremely terrible consequences will occur because the chemical name of the absorbent component is - sodium hydroxide (naoh), commonly known as caustic soda, caustic soda, and caustic soda.

Sodium hydroxide can absorb carbon dioxide. Because naoh and co2 react, it is used as absorbents by many closed scubas.

But this thing is not fun to encounter with sea water.

It releases deadly toxic gases that damage people's lungs until they become coma or even die.

Zhuangyan quickly swam to Fahri, Zahad, and Wei Shuping.

He grabbed Zahad and then made a "float" sign language at him, then pointed at the carbon dioxide absorbing barrel on his back.

Fahri was experienced and solemn, and when he saw the bubble, he immediately knew what was going on.

But Zahad didn't respond.

Zhuang Yan pulled him again, but still no response.

He immediately grabbed his chin and raised his head.

As a result, it was found that this guy had already started rolling his eyes. Although he had not yet fallen into a coma, he looked a little dizzy.

"Go up!" Zhuang Yan quickly made a sign language.

Fahri came up, stood with Zhuang Yan, and then began to float up.

Since the dive reached a depth of 70 meters before, it is necessary to stay in decompression.

There is an oxygen supply problem here.

Do different water depths to perform ladder pressure relief stays, each stop must be three minutes.

If Zahad continues to breathe the toxic gases in his scuba, it will be like killing him.

Floating up requires decompression, and it is definitely not possible to do without decompression. Otherwise, your lungs will explode from the 70-meter bottom to the water surface all at once.

This group of four people will suffer serious consequences due to decompression, and they will not even be able to save their lives.

Deep-sea diving is not a joke, any small details can kill you.

But this situation was expected, and each safety officer would carry a bottle of small oxygen to standby, each of which could last for about 40 minutes.

I just worked underwater for 70 meters for 15 minutes, which means that there are 6 decompression layers at a depth from 21 meters to 3 meters at the bottom of the water, and I have to stay for more than 55 minutes in total.

For nearly an hour, oxygen supply needs to be maintained.

At the bottom of the sea, even if an emergency occurs, it is impossible to come.

Decompression symptoms can be big or small. Deep diving training must strictly abide by the rules, otherwise it will be a cost of life.

Zhuangyan and Fahri had spare rescue oxygen cylinders, so they quickly replaced Zahad.

When the four finally came out of the water, the people on the boat knew that something was wrong.

Everyone pulled Zahad, who was almost limp, to the largest ship.

This guy's eyes are now black and blue, and his lips are swollen like two sausages, which reminds Zhuang Yan of Ouyang Feng played by Tony Leung in a Hong Kong film "East and West".

In those eyes, the whites accounted for the majority.

Ahmed and the military doctor who accompanied the team came up and removed Zahad's diving gear, then climbed out of the diving wetsuit and started first aid.

Cui Weinan moved to Zhuang Yan's side, looked at Zahad as if he was dead, and whispered: "Look, I'm right! The blessings are unparalleled and misfortune never comes alone, how can the ancestors not listen to what they say?"

Zhuang Yan was already annoyed enough. The whole rescue just now made him exhausted physically and mentally. He was too lazy to listen to Cui Weinan’s tricks here, so he rolled his eyes at him and said, “I said, Lao Cui, can you say something constructive?”

Cui Weinan said: "It's okay, I think Zahad is fine. I just washed some caustic soda gas! Didn't you find out soon after sucking it? I see his condition. At worst, I can't go to the hospital and die."

Zhuang Yan stretched his head forward and looked at Zahad, who was rescued by the doctor, as if the situation was getting better.

Ahmed asked about the situation, and the doctor also said that the problem was not too big.

Cui Weinan said: "I heard it, I said it's okay if it's okay. By the way, don't you want to hear constructive things? OK, I'll tell you something serious."

"What's the matter?" Zhuang Yan didn't even look at Cui Weinan, feeling that this guy had nothing to say.

But this time it seems that I was wrong.

Cui Weinan said seriously: "I think you want to make meritorious service... No, I mean, you must be commended. After all, you saved Zahad's life and you would express it to you no matter what you say, right?"
Chapter completed!