v3 Chapter 267： Red tide?

Latest website: When diving, there are different chances of encountering the Shanghai stream depending on the diving location.

The descending stream, as its name implies, is the downward current. This can be seen from the bubbles exhaled from the mouths of the three. The rising bubbles suddenly scattered around in a ring, and then began to drift downwards. The two turtles not far away saw the situation shrink back into the rock gap, and at the same time the vision of the three of them began to become cloudy.

Fortunately, except Zhang Heng, the other two are not newbies, including Han Lu. This is not the first time they have encountered ocean currents, so they will not be as panic as beginners. His body was attached to the stone wall, and he caught it like a gecko.

Nelly turned on her flashlight and took a picture of the large rock closest to Zhang Heng to signal Zhang Heng's passing. She also swam to it. The two did not descend at a fast rate, indicating that they encountered The current is not strong, which makes Nelly relieved, and Han Lu and Zhang Heng are also calm.

The most dangerous thing to do underwater is to panic. Not only can't solve any problems, but the random struggle will accelerate the consumption of oxygen, and the wrong operation is likely to cause more trouble. Han Lu has enough diving Experience Nelly isn't too worried. What she really worried about is Zhang Heng on the other side, especially the latter just asked for an ascent. As a result, she encountered the current.

Fortunately, Zhang Heng has not shown any panic so far, swimming with Nilly to the edge of the rock.

About a minute and a half, Nelly felt that the current had become smaller, so she gestured to ask Zhang Heng how much gas she had.

Zhang Heng glanced at the residual pressure gauge, which showed that he still had about 120 bar of gas. The three did not spend long underwater, and basically moved at a depth of about 25 meters, and did not dive too deeply. Therefore, the gas consumed in the cylinder is not much, and it is far from the warning line.

However, since Zhang Heng has decided to ascend, of course Nilly has no reason to continue diving as a dive guide, but before the ascent, the two need to meet with Han Lu at the stone wall first.

Unlike the relatively clear sea water before, because of the influence of the current, many sediments and impurities are brought up, and the visibility in the water becomes very low. Nelly turned on her flashlight again, but did not know if it was due to insufficient power. The flashlight in her hand flashed several times this time before gradually stabilizing.

However, when Nelly moved the flashlight to the rock wall where Han Lu was, she suddenly realized that the shadow of the latter was no longer there.

Nili blinked, and seemed a bit unable to believe what she was seeing, because Han Lu was the first person to find a place to fix her body when the downfall came, and it was clear that her condition at that time had been separated. Dangerous, but the three of them separated for less than two minutes. Han Lu left the position for no reason in such a short time.

Nelly then turned the flashlight to other directions nearby, the figure of the searcher Han Lu, but there was no receipt, and at this time, Nelly saw Zhang Heng gesturing to her and pointed to the top of her head.

Nelly thought it was Zhang Heng who found Han Lu, but when she looked up, she saw a weird sight that she had never seen in so many years of diving experience, and saw that the sea of ​​water above their heads was visible to the naked eye. Constantly red.

Is this red tide?

Nelly lives by the sea. Although she has not seen the red tide with her own eyes, this natural phenomenon is not unfamiliar. Red tide is generally due to the explosive reproduction of some phytoplankton, bacteria or protozoa in the sea in a short time or Caused by the high concentration, it will change the color of the seawater and cause great harm to the environment.

However, this area of ​​the sea is a famous diving site with the island. The residents of the island have always attached great importance to the ecological environment. For many years, red tides have never occurred in the nearby seas, and the red tide generally affects the upper seawater. Nelly found that The red patch above them was approaching them quickly.

Soon the two of them were filled with red seawater. The color of these seawater was close to human blood, and it was very infiltrating, and the most important thing was that they would further reduce the visibility. Now Ni Li could only see a distance of less than two meters in front of her, and even Zhang Heng's figure became indistinct.

Even with Nili's rich diving experience, she can't help but feel anxious now, mainly because this weird "red tide" appeared sooner or later, just at the point where they searched for Han Lu and let the next search Work suddenly became difficult.

Nelly wanted to take Zhang Heng up and then return to find Han Lu herself, because Zhang Heng had already asked her to ascend before the downflow appeared, but the divers took time to rise, because the pressure at different depths is different. At deeper levels, nitrogen can dissolve into the blood.

At this time, it is mainly the danger of drunk nitrogen mentioned earlier. At this moment, nitrogen is dissolved in the blood, and if the pressure is rapidly reduced, the nitrogen dissolved in the blood will precipitate and cause thrombosis. Divers suffer from diving sickness, and in the worst case they explode.

Therefore, when rising from the water, there needs to be a safe stop time. It will take seven minutes for Nelly to take Zhang Heng back to the ship as soon as possible, not to mention whether she can touch it back in the blood-red water Current location ~ www.novelhall.com ~ At that time, Han Lu wasn't around and it was hard to say. In addition, the remaining gas in her cylinder was probably not enough to support her for a long search.

If usually, Nelly can choose to take Zhang Heng to find Han Lu, but because of this strange red tide, the two of them may not see each other as long as they are slightly apart, in this kind of bad Under the circumstances, Nelly is not confident that she can take good care of Zhang Heng when looking for Han Lu.

Han Lu has disappeared. Don't lose Zhang Heng anymore.

Nelly decided to take Zhang Heng to rise after a short time of thinking, because she also had luck in her heart, maybe Han Lu had already returned to the boat one step before, and they could see each other when they floated out And, to be honest, even if she is taking Zhang Heng to find Han Lu now, she is just lucky.

But just as Nelly was about to take Zhang Heng together to rise, she seemed to catch a glimpse of dark shadows in her left eye.

Is that Han Lu? Nilly's heart gave birth to another hope. Although the shadow had passed quickly just now, she still saw the general outline, and she really looked like a person wearing a diving suit.