Zhuang Yan found that this string of strange bubbles did not emerge from the surrounding seabed silt or coral clusters, but from the device behind Zahad's scuba!

The diving system is leaking!

Immediately, this thought made one shiver in the solemn mind.

This is a deadly situation for anyone using fully enclosed diving gear.

Fully closed rebreather can be divided into manual and fully automatic, usually fully automatic closed rebreather is called.

Semi-closed rebreather and fully closed rebreather are two completely different concepts. The manual and fully automatic principles of fully closed rebreather are the same, except that the gas is controlled manually and electronically automatically. Supplement the valve to adjust the oxygen concentration of the circulatory system at different depths to stay underwater for a longer time.

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

In the past, open scuba diving was inhaled through the cylinder, and the air was directly exhausted into the sea after the human body’s oxygen metabolism, while the diver only used about 5-6% of the oxygen in the gas in the process of oxygen metabolism, and the rest of the oxygen was generated together with the metabolism. of carbon dioxide are emitted together.

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

The gas continuously circulates in one direction in the circuit. The oxygen used by the human body is supplemented from the pure oxygen cylinder. The task of the carbon dioxide absorption barrel is in the closed circuit rebreather, and the CO2 absorbent is used to purify the CO2 in the breath of the diver. Absorption, so that the diver can breathe again and save the diver's breathing gas. The principle is very simple.

Just because the design principle is like this, the viper-e2000 scuba will not produce air bubbles, all breathing and breathing are completed in one system, and there will be no leakage.

Now there are air bubbles seeping from Zahad's back, which means that the airtight scuba is leaking.

The viper-e2000, which hangs on Zahad's back, contains carbon dioxide absorbents.

Once there is leakage, it will have extremely dire consequences, because the chemical name of the component of the absorbent is called sodium hydroxide (naoh), which is commonly known as caustic soda, caustic soda, and caustic soda.

Sodium hydroxide can absorb carbon dioxide, because naoh and co2 will react, so it is used as an absorbent in many closed scuba.

But this thing is not fun at all when it encounters sea water.

It releases a deadly poisonous gas that damages the lungs, leading to coma or even death.

Zhuang Yan quickly swam to the side of Fahri, Zahad, and Wei Shuping.

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

Fahri is experienced and solemnly pointed. When he saw it, he immediately saw the bubble and knew what was going on.

Zahad did not respond.

Zhuang Yan tugged at him again, but there was still no response.

Immediately grabbed his chin and lifted his head.

It turned out that this guy had already started rolling his eyes. Although he had not yet passed out, he looked a little dizzy.

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

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

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

There is an oxygen supply problem here.

Do decompression stops in different water depths, and each stop must be three minutes.

If Zahad continues to breathe the poisonous gas in his scuba, it will kill him.

You must decompress when you go up, and you can't do it without decompression. Otherwise, if you float to the surface from the bottom of the 70-meter seabed, your lungs will explode.

This group of four people will suffer serious consequences from decompression sickness, and even their lives will not be saved.

Deep sea diving is no joke, any little 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 now I worked under 70 meters of water for 15 minutes, which means that there are 6 decompression layers from 21 meters to 3 meters below the bottom when floating, and it takes more than 55 minutes to stay in total.

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 rush.

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

Zhuang Yan and Fahri had spare rescue oxygen cylinders on them, and they quickly replaced them with Zahad.

When the four finally got to the surface, the people on the boat already knew that something had happened.

Everyone moved Zaharda, who was almost limp, to the largest ship.

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

In those eyes, the whites occupy most of them.

Ahmed and the military doctor accompanying the team came up to remove Zahad's diving gear, and then climbed off the diving suit to start first aid.

Cui Weinan moved to the solemn side, looked at Zahad like a dead fish, and whispered: "Look, I'm right! Fu Wushuang and misfortune do not come singly, can you not listen to the words of the ancestors?"

Zhuang Yan is tired enough, the whole rescue just now made him physically and mentally exhausted, and he is too lazy to listen to Cui Weinan's **** here, he rolled his eyes at him and said, "I said, Lao Cui, can you say something constructive? if?"

Cui Weinan said: "It's fine~lightnovelpub.net~ I think Zahad is fine, he just washed a little caustic soda gas! Did you smoke it for a long time, didn't you find out soon? I see his situation, it's a big deal If you go to the hospital, you won't die."

Zhuang Yan stretched his head forward and glanced at Zahad, who was being rescued by the doctor. It seemed that the situation was improving.

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

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

"What's the matter?" Zhuang Yan didn't even look at Cui Weinan, thinking that this fellow has nothing good to say.

But this time it seems to have guessed wrong.

Cui Weinan said solemnly: "I think you have to make a contribution... No, I mean, you will definitely be commended. After all, you saved Zahad's life, so you have to show it to you when you say anything, right?"

"Ah?" Zhuang Yan didn't expect that Cui Weinan told himself this.