Live Wilderness Adventure

Dark underwater world.

Bi Fang adjusted his posture in the water, concentrated his strength on his upper body, and quickly shook his fist.

The dolphin's skin is very smooth and very soft, Bi Fang's punch, like a giant carbon fiber plastic board cushioned on the sea surface, quickly slashed from his head.

Although the damage was minor, it still made the dolphin feel the pain and rolled over in the water.

It was covered by the punch.

The bottlenose dolphin and its companions were stunned, not understanding what Bi Fang was doing, they swam beside Bi Fang and made sharp calls in the water.

Huge in-ear murmur mixed with calls circulated in Bi Fang's brain, and he could feel the dolphin in front of him questioning.

It is doubting Bi Fang's behavior.

It's a pity that the dolphin's question was not answered, but it attracted more punches on the soles of the feet.

A few minutes later, the dolphin's caudal fin slapped Bi Fang's chest, and together with his companion, he fled away, ignoring the stranger he "saved".

Huge force slapped Bi Fang on the rock wall, smashing many sandstone and gravel, but Bi Fang not only did not feel uncomfortable, but laughed.

However, it hurts.

Bi Fang reluctantly clutched his chest, his lungs were constantly compressed under the action of water pressure, and the dolphin's tail fin smashed straight up like a battering ram, almost slapped him and vomited blood.

At this moment, Bi Fang was short of breath in his chest, as if he was holding his breath, retching, and a little breathless.

The bigger the animal, the stronger the strength. The black bear that Bi Fang hunted was only 300 kilograms, but the bottlenose dolphin just now exceeded 300 kilograms, that is, 600 kilograms, which is a full one heavier than the previous black bear. times!

It sounds incredible, it looks so fierce, the huge black bear is only half the weight of the dolphins in the aquarium?

In fact, this is true. Male black bears usually weigh between 60 and 200 kilograms, but male bottlenose dolphins can weigh between 300 and 650 kilograms.

The reason why the black bear looks bigger is entirely the visual effect caused by the fur and scattered limbs, and the quality is far less than that of an adult dolphin.

In the sea, Bi Fang is not only inconvenient to move, but also dolphins do not have the obvious weakness of black bears. They are better at attacking and swimming. One-on-one, he doesn't have much chance of winning, let alone two.

Bi Fang didn't dare to use too much force just now, for fear that he would really set the opponent on fire, and he might not be able to beat the opponent...

Leaning on the rock wall, Bi Fang was biting on the breathing valve to constantly exchange airflow, soothing the stagnant chest cavity. The huge Niugang trevally was still stuck on the spear at this time, and its tail fins floated up and down with the current.

Above the sea, several cruise ships with colorful lights are wandering in the distance, and if you look closely, you can see the unique dolphin shape on the ship.

As a restricted area, Dolphin Bay is rarely visited. Only nearby fishermen come back to patrol occasionally, and even cruise ships will not approach it easily.

Keke and Mandy stood in the shadows on the shore, not daring to show their heads at all. Occasionally, when someone passed by, they quickly hid in the rocky reef, staring wide-eyed.

Looking at the calm sea, the two were anxious in their hearts.

Bi Fang's strength is obvious to all, but after all, it is underwater, and underwater has never been a special event for humans.

Sun monkeys are not good at water, let alone ordinary humans.

In addition, the opponent is the famous water bison, which is inevitably worrying.

Mandy and Keke are very good diving, a national champion, a professional instructor, and have a lot of understanding of underwater creatures, but this does not mean that they can fight against those creatures.

If he wants to go into the water to help Bi Fang, there is nothing he can do. Instead, there may be a situation where Mandy meets the Niugang trevally, and he is knocked out in a single encounter, becoming a big burden.

"Ten minutes, it won't be an accident, right?"

"It's not that I didn't bring an oxygen bottle, just wait."

"Hey, here we come!" Mandy shouted, pointing to the sea.

The calm sea suddenly broke into a wave, Bi Fang was standing on the small talk, the spear was leaning on his shoulder, and a large fish almost as tall as a person was hanging on the tip of the spear, dripping a mixture of blood and seawater.

Bi Fang tore off his goggles, closed the oxygen valve, and breathed in the fresh air from the coast. The thick salty wind poured into his lungs, feeling the long-lost indulgence.

The caudal fin of the Niugang trevally twitched subconsciously, and Bi Fang threw it to the ground and took another shot.

Mandy and Keke rushed over to the water, looking at the Niugang trevally that was covered by the sea water for most of its body.

Mandy fluttered with his hands and shouted: "wtf, I thought you were going to drive it away, but you actually killed it directly?"

Bi Fang waved his hand, found a few nodes on the Niugang trevally, and stabbed it with a spear.

"What are you doing? Isn't it dead?" Mandy was surprised, and he was excited now.

It's one thing to see it on TV, but it's another thing to experience it in person, especially since I'm a powerful witness of Niugang Trevally.

Bi Fang went down with a few spears, and the blood of the Niugang trevally gurgled out of those holes.

"Niugang trevally is generally not bought by many people, except for its poor meat quality, because it has a lot of toxins in its body."

"This guy mainly feeds on crustaceans, arthropods, fish and water birds. Some crabs, shrimps, snails and sea fish that he likes to eat contain natural biological toxins, which will accumulate in the blood of Niugang trevally, so they can be caught quickly after being caught. Bloodletting and detoxification can prevent accidents after eating.”

Such points are known only to some seasoned sea fishing experts, and many newbies don't even know anything about it. Even amateurs like Keke don't know there is such a thing.

No wonder the last time I went out to sea fishing, I saw someone pierced a few holes in the Niugang trevally that he caught. At that time, Keke thought he was exhausted and was using it to vent his anger.

Bi Fang and Keke dragged a full 70 kilograms of Niugang trevally to the shore.

"Eat, do you want to eat it?"

Bi Fang nodded: "I want to taste it."

Although it is not delicious, Bi Fang understands it. He has never tasted it himself, let alone fished it by himself, so there is no need to throw it away.

"How did you kill it?" Mandy and Keke were very curious.

Bi Fang shook his head again and told the two of them what had just happened underwater.

Mandy's eyes gleamed, clearly the excitement of the kind he encountered.

"I hope the last blow will break the dolphin's goodwill towards people. It's best to run far away, leave when you see the fishing boat, and never come back here again." Bi Fang sighed.

The atmosphere suddenly fell silent.

Keke nodded silently, in order to prevent dolphins from having a good impression of humans, isn't this a kind of sadness?

"Okay, don't think too much." Bi Fang held the shoulders of the two and looked up at the moon in the sky, "It should be around twelve o'clock now, we are running out of time, hurry up and work!"

"We will finish all this early and tell the public all the truth. This is what we are here for!"

The black bear hunting season started on July 12. On the first night, Bi Fang, Mandy, Keke, and the three arranged a part of the plane in the jungle together.

Today is the second day of the hunting season, which is the evening of the 13th. We will try to arrange all the underwater cameras in one night.

There are still many places on the mountain that are good angles for shooting, and I didn't have time to install them.

In order to bring these equipment, Richard and the others shared a total of forty-three large boxes, which shows how heavy the task of Bi Fang and the others is.

This is not just to move things out and arrange them, but to place them in suitable places and at suitable angles according to different design features and camouflages.

According to the news that Bixiang heard from local fishermen on the first night, the dolphin fishing season will start on July 15th, which is the evening of the day after tomorrow.

In the evening, a grand sacrifice was held to announce the start of the dolphin fishing season, which lasts for half a year. On the morning of July 16, many fishing boats will leave the harbor and use sonar devices to drive all the dolphins in the nearby waters away. Go to the Dolphin Bay surrounded by mountains on three sides.

Do mass killings.

There is not much time left for them. Tonight, the night of the 14th, a lot more, and the evening of the 15th, there are still three chances, and the massacre will begin.

I can't wait.

The three moved quickly, Mandy nervously put on a spare diving bottle, and followed Bi Fang into the water.

Ten meters, twenty meters, thirty meters.

Bi Fang and Mandy quickly adapted to the process and dived deeper.

After more than 30 meters, a completely different feeling arises spontaneously.

The whole body is different, the huge sea water pressure will slowly change the density of the two people's bodies, when they reach a certain critical point.

Bi Fang felt that his body was sinking, and the buoyancy could no longer completely offset the gravity. Under the drag of gravity, the two slowly fell towards the depths.

This is a touch that diving trainers can't bring at all, magical and wonderful.

They were pushed slowly into the depths of the ocean.

There are three most important diving laws that any diver needs to keep in mind. They are:

Boyle's Law.

Dalton's Law.

Henry's Law.

Sounds familiar, doesn't it?

Yes, these are the three laws of gases.

The vast majority of recreational divers use air or enriched air as their primary breathing gas. These scuba diving gas laws apply to all breathing gases. Trimix or pure oxygen may be encountered.

The first rule of scuba diving: Never hold your breath!

Corresponding to Boyle's Law: For an ideal gas, the pressure and volume are inversely proportional when the temperature is constant.

Think of the lungs as a balloon that we can inhale to blow up, or exhale to empty the air inside and make it shrink.

When we dive, the pressure rises, and with each breath, the air inside the lungs is compressed, but the space in the lungs fills up again when we inhale.

The deeper you dive, the higher the pressure, and more air is needed to fill it, so air consumption increases.

The pressure on a diver's lungs at depth causes them to need more energy to expand their lungs.

When breathing regularly, the "balloon" never inflates too much.

The same is true for the following two laws.

The reason why deep diving is called technical diving is because there are too many technical means in it.

This is a way of balancing the lungs and qi.

Coincidentally, Bi Fang is well aware of this.

These abyss worlds seem to be completely separated from the rest of the earth, where they have been waiting quietly for millions of years, until Bi Fang's flashlight cast the first ray of light there.

A pressure-resistant infrared detector was installed 40 meters away.

This belongs to military equipment and cannot be taken out of the country under normal circumstances. It was approved after Bi Fang made an application. Through infrared rays, the activities of dolphins can be better detected.

More than 30 meters, the sun can barely shine, and below 30 meters, it will be dark even in the daytime, so further down, Bi Fang and others need to install a detection device instead of a camera.

More than half of these devices may be useless, but they must exist, just like a lot of discarded shots in filming. Not every device can capture just the right shots, but it must exist.

After reloading, Bi Fang didn't rashly dive, he fired a flashlight, and made a series of flashing signals to Mandy.

When Mandy finished answering, he also flashed a flash, and Bi Fang answered.

After confirming that the two of them were all right, Bi Fang adjusted the gas in the oxygen cylinder and continued to dive.

People usually define diving to a depth of less than 40 meters as recreational diving.

Why choose the number 40 meters?

Two reasons.

One, in this deep dive, you can directly rise to the surface in an emergency without worrying about serious safety issues.

Second, the partial pressure of air at sea level is one bar, then under the partial pressure of oxygen of 1.4 bar, the toxicity of oxygen will increase, and oxygen poisoning may affect the diver's central nervous system, causing the diver's underwater nerve convulsions.

This directly affects the diver's ability to bite the adjuster.

Similarly, when the partial pressure of nitrogen is around 30 meters, and exceeds about 3 bars, some divers will have a feeling of anesthesia, which is aggravated as the partial pressure increases.

This is Henry's Law, which relates the solubility of a gas in a liquid as a function of the surrounding pressure.

As the diving depth increases, the nitrogen in the body will also accumulate.

This nitrogen gas will put the body into a state similar to drunkenness, commonly known as "nitrogen intoxication".

At a depth of less than 40 meters, the effect of nitrogen narcosis will be so strong that people lose their ability to judge and react, resulting in safety accidents.

Many people don't even realize that they are nitrogen intoxicated. They feel very clear about themselves, and even feel very high, but they can't even do the basic math problem that one plus one equals two.

Just now, Bi Fang and Mandy were confirming each other's sobriety, and gave each other a two-digit addition and subtraction math problem.

Because of this, people set the depth limit of recreational diving at 40 meters, and diving beyond 40 meters enters the field of technical diving and industrial diving.

The troubles of decompression sickness and nitrogen intoxication are all caused by nitrogen, but it is impossible without nitrogen, because direct inhalation of pure oxygen is toxic.

Astronauts can breathe pure oxygen for a few hours before a spacewalk and will not be affected by decompression sickness, but this is because the air pressure inside the spacesuit is smaller than that inside the space station, which is equivalent to a decompressed environment.

Pure oxygen toxicity is conditional - when the partial pressure of inhaled oxygen exceeds 0.3 bar (30 kPa), oxygen becomes toxic to cells.

What space astronauts can do is not possible underwater. People inhaling pure oxygen in a high-pressure underwater environment will cause oxygen poisoning.

The human body is so fragile.

Even more accurately, at a depth of more than 55 meters, even breathing air can lead to oxygen poisoning, let alone breathing pure oxygen.

At this time, the oxygen cylinders behind Bi Fang and Mandy have three gases, helium, oxygen, and nitrogen.

This is the so-called three-phase gas. The addition of helium reduces the content of oxygen and nitrogen. Just how to match the content is enough to give amateurs a headache.

Not only diving, but ascending is more troublesome. You need to stay at different depths for enough time to gradually expel the excess nitrogen in the body.

The world record for technical diving was set in 2014 by a man named ahmedgabr - he dived to a depth of 332 meters.

It took gabr just 14 minutes to descend to 332 meters, but 14 hours to surface.

Even though Bi Fang can now dive into the 70-meter field at one time, this is based on the fact that he does not need to stay for a long time, and the changes in his body are not too drastic.

Staying too long, he also needs to obey the laws of physics.

50 meters underwater.

Bi Fang's body entered the second stage, and the capillaries in the lungs began to congeal and harden to protect the chest cavity from being damaged by water pressure.

The pressure is getting bigger and bigger. Ordinary people do not make any preparations and enter such a stressful environment in an instant, and they will die.

A long time passed ~www.readwn.com~ until 80 meters underwater.

Eighty meters, a number that makes people feel suffocated, but the more you struggle, the more dangerous it is.

Here, you can only rely on spiritual and psychological strength to overcome, tell yourself, conform to nature, and only completely relax can you turn damage into protection.

In the pitch-dark world, far away from light and human beings, accompanied by only coldness and loneliness, Bi Fang seems to have become a small droplet, floating quietly in the ocean.

With the installation of the last piece of equipment, Mandy and Bi Fang breathed a sigh of relief.

Plan done!

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