It was solemnly discovered that this strange string of bubbles did not come out of the surrounding sea mud or corals, but from the device behind Zahad's scuba water!

It's the diving system that's seeping!

The thought that made people shudder immediately passed through his solemn mind.

For those who use fully enclosed diving gear, this is a fatal situation.

Fully enclosed rebreathers can be divided into manual and fully automatic, and usually fully automatic closed rebreathers are called ECCR.

Semi-closed rebreather and fully enclosed rebreather are two completely different concepts in design, the manual and automatic principle of fully enclosed rebreather is the same, but through manual and electronic automatic control of gas replenishment valve, adjust the oxygen concentration of the circulatory system at different depths, and achieve a longer stay under water.

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

In the past, open scuba diving was inhaled by a cylinder, and the air was directly discharged into the sea after oxygen metabolism in the human body, but the diver only used about 5-6% of the oxygen in the gas during oxygen metabolism, and the rest of the oxygen was emitted together with the carbon dioxide produced during metabolism.

The fully enclosed rebreather is a respiratory circulation loop system, which is operated by our lungs; gas supply cylinders (pure oxygen and dilute gas); respiratory air bags; Pipeline; carbon dioxide suction barrel; The control part (electronic valve, oxygen sensor, computer, etc.) is composed.

The gas is constantly circulating in the one-way circulation, the oxygen used by the human body is replenished from the pure oxygen cylinder, the task of the carbon dioxide suction barrel is in the closed rebreather, the CO2 absorbent is used to purify and absorb the CO2 in the diver's exhaled air, so as to provide the diver to breathe again, saving the diver's breathing volume, the principle is very simple.

Because of the design principle, the VIPER-E2000 scuba does not produce air bubbles, and all exhalation and inhalation are done in one system, so there will be no leakage.

Now there are bubbles oozing from Zahad's back, which means that the closed scuba is leaking.

The VIPER-E2000 attached to Zahad's back contained a carbon dioxide absorber.

Once there is a leak there, it will have extremely terrible consequences, because the chemical name of the absorbent is sodium hydroxide (NaOH), which is commonly known as caustic soda, caustic soda, caustic soda.

Sodium hydroxide absorbs carbon dioxide and is used as an absorbent by many closed slung acubas because NaOH reacts with CO2.

But it's not fun at all when it encounters seawater.

It releases deadly toxic gases that can damage a person's lungs until they are comatose or even dead.

Zhuang Zhuang hurriedly swam to Fakhri, Zahad and Wei Shuping.

He grabbed Zahad and made a "float" sign language at him, then pointed to the CO2 absorption bucket on his back.

Fakhri was experienced and pointed solemnly, and as soon as he saw the bubbles, he knew what was happening.

Zahad didn't react.

Zhuang Zheng tugged at him again, but still didn't see a reaction.

Immediately grab his chin and lift his head up.

It turned out that this guy had already begun to roll his eyes, and although he hadn't passed out yet, he looked a little dizzy.

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

Fakhri came up, stood aside, and began to float.

Since the previous dive to a depth of 70 meters, it was necessary to do a decompression stop.

There is a problem of oxygen supply here.

Do different water depths to do cascade decompression stops, each station must be three minutes.

If Zahad continued to breathe the toxic gases in his own scuba would be killed.

If you don't decompress, you will definitely not be able to do decompression, otherwise you will have to blow up your lungs from the 70-meter seabed to the surface of the water.

All four of them in this group will suffer serious consequences because of decompression sickness, and they will not even be able to save their lives.

Deep sea diving is no joke, and any small detail can kill you.

But this situation has long been expected, and each safety officer will carry a small bottle of oxygen for backup, each of which can last about 40 minutes.

Just 15 minutes of operation at 70 meters, this means that there are 6 decompression layers from 21 meters to a depth of 3 meters when ascending, and a total of more than 55 minutes will be stayed.

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

At the bottom of the sea, even if there is an emergency, there is no urgency.

Decompression sickness can be big or small, and deep diving training must strictly follow the rules, otherwise it will cost you your life.

Both Majrable and Fakhri had spare oxygen cylinders on them, and they hurried to replace them for Zahad.

When the four of them finally came out of the water, the people on the boat already knew that something had happened.

Everyone worked hard to get Zahadra, who was already paralyzed, to the largest ship.

This guy now has dark bags under his eyes, and his lips are swollen like two sausages, which reminds Zhuang Zhuang of Ouyang Feng played by Tony Leung in a Hong Kong film "East Becomes West".

In those eyes, the whites of the eyes occupy the majority.

Ahmet and the military doctor who accompanied the team came up to unload Zahad's diving gear, then climbed out of the wetsuit and began first aid.

Cui Weinan moved to the solemn side, looked at Zahad as a dead fish, and whispered: "Look, I'm right!" Blessing and misfortune are not a single line, can you not listen to the words of the ancestors? ”

Solemnity was annoying enough, the whole rescue just now made him physically and mentally exhausted, and he was too lazy to listen to Cui Weinan talking here, 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, isn't it just a little caustic soda gas!" Didn't you find out how long you sucked it? I see his condition, it's a big deal to go to the hospital, and he can't die. ”

Solemnly stretched his head forward and glanced at Zahad, who was being resuscitated by the doctors, and it seemed that his condition was improving.

Ahmed asked about the situation, and the doctor said it wasn't too big.

Cui Weinan said: "I heard it, I said it's okay, it's okay." By the way, don't you want to hear constructive words? Okay, I'll tell you a serious thing. ”

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

But this time it seems to have been guessed wrong.

Cui Weinan said seriously: "I think you have to make meritorious contributions...... No, I mean, you're definitely going to be commended. Anyway, you saved Zahad's life, so I'm going to show you whatever I say, right? ”

"Huh?" Zhuang Zheng didn't expect that Cui Weinan was telling him about this.