It is June now, and the sun is still relatively sufficient, so the three of them felt a little stuffy when they were wearing wetsuits on the boat, but the stuffy feeling disappeared after entering the water, especially as the depth continued to increase and the temperature began. Gradually decreases.
Because the thermal conductivity of water is much higher than that of air, people lose more heat in water than on land. Fortunately, there are diving suits to keep out the cold, and recreational diving like this generally does not dive too deep. , because of the pressure, every time you dive 10 meters in the water, the pressure will increase by one atmosphere, and after more than 30 meters, there will be a danger of nitrogen drunkenness (compressed air is mainly contained in ordinary recreational diving cylinders, which is 21% Oxygen and 79% nitrogen, high pressure will make nitrogen into the body, and oxygen under high pressure breathing for too long will also cause oxygen poisoning).
The underwater ruins that Zhang Heng and the others went to this time are about 25 meters deep. There is basically no danger at this depth. With the water quality that Zhang Heng has trained in the Black Sail instance, even if he does not bring any equipment , He can dive to this depth with just one breath. Of course, in that case, he doesn't want to stay below for a long time. Basically, he has to go back to take a breath when he sees the ruins.
Strictly speaking, this visit to Okinawa is not Zhang Heng's first dive.
When he was a child, he followed his parents to see corals in Sanya, but it was purely parent-child leisure. The depth of the dive was less than eight meters, and the time he stayed underwater was very short, only 20 minutes. Accompanied by coaches.
To put it into perspective, when Zhang Heng wore equipment and stayed underwater for a long time, he was still in the Apollo training camp. NASA used the underwater environment to simulate weightlessness. Console commands complete a series of operations.
So when he returned to the water, Zhang Heng didn't feel strange.
Whether it is the feeling of weightlessness or the quietness underwater, the sea water almost isolates all sounds. Every diver can basically only hear his own inhalation and exhalation when diving, especially the sound of exhalation. When inflated, the bubbles pass through the sea water and make a rushing sound when they float upward, which is quite reassuring.
As expected, Nelly was as competent as she said. She always stayed at a distance of no more than two meters from the two of them, closely watched their physical and mental conditions, and confirmed that they did not encounter any trouble when they dived. Only then did she gesture, pointing to the ruins not far away, and asked the two to follow her.
In fact, she didn't need to specifically signal, as long as she dived into the water, it was difficult to ignore the scene in front of her. This is a huge submarine palace or pyramid-shaped building, which is very dilapidated from the outside. It is said that it can be dated back to about 10,000 BC.
If this underwater site was built by the people living here at that time, their production technology level may have reached the level of the Egyptians when they built the pyramids, and you must know that the latter happened around 3000 BC.
This is why many experts firmly believe that the stone building in front of me is just a coincidence of nature. However, after witnessing the neat stone steps and the smooth square rock wall, Han Lu is still more willing to believe that it is here. It really is a remnant of a mysterious lost civilization.
She even saw what appeared to be gates and traces of roads.
Nelly gestured to let Zhang Heng and Han Lu get closer, while she picked up the underwater camera, took a photo of the two of them with the underwater ruins in front of them, and then swam towards the gate.
Han Lu followed closely with a video recorder, while Zhang Heng checked the time and direction on the diving computer, and then followed.
The three of them passed through the stone gate one by one. It was said to be a city gate, but in fact it was just three stones put together. Heng also saw a little sea hare.
This sea creature lives up to its name, it looks as cute as a little rabbit with ears (but it does not rule out that there are ugly sea rabbits, there are many kinds of these things), when it comes to a strong woman like Han Lu No, even a little girl like Nelly can't handle this kind of cute thing, and she shoots wildly around it, just like a photographer under the stage of Victoria's Secret.
After a delay of about a minute, they continued to move forward. Afterwards, the three of them swam through a somewhat narrow place. In the narrowest position, only two people could stand side by side. Then, the field of vision suddenly became wider, as if they had come to this place. In the hall of an underwater palace.
Looking around, there are walls made of rocks, and the sparkling water above the head.
Nelly, who was leading the way at the front, stopped, folded her left and right hands together, and swung her thumbs up and down quickly. This was to tell the two that there were sea turtles ahead to see. Seeing two sea turtles between the rocks, she also waved to Zhang Heng behind her, signaling him to follow quickly.
But Zhang Heng didn't seem to see her waving, he still stayed where he was, looking a little lost.
For some reason, when Zhang Heng saw this underwater ruins for the first time, a sense of deja vu flashed in Zhang Heng's heart, but the feeling of deja vu was not too strong at first, but when he came to this open air " In "The Great Hall", this feeling reappeared again, and this time, Zhang Heng knew where his sense of déjà vu came from.
He had a weird dream in the alien dungeon before, in the dream he came to a seaside town with a gloomy atmosphere, and after collecting all the shadow sets, he returned to that seaside town again, at that time he was This feeling, and now, this feeling has appeared again.
Considering what happened later in that small town, that didn't bode well.
Although this diving spot is quite famous, it receives quite a few tourists every year, and no one has had an accident here so far, but Zhang Heng doesn't want to doubt his instinctive perception.
Afterwards, he decisively gave Han Lu and Nelly a thumbs up, asking to be promoted.
Nelly felt a little strange, she didn't know why Zhang Heng suddenly stopped the dive, and wanted to gesture to ask what difficulties Zhang Heng had encountered. On the contrary, Han Lu was more experienced. She and Zhang Heng had experienced the death dream incident together. Finally, he trusted the latter unconditionally, and also knew that there was another crazier and darker world hidden under the ordinary world.
Therefore, upon seeing the situation, he did not question why Zhang Heng made such a decision, but immediately and firmly made a rising gesture.
But immediately afterward, Nelly's expression changed suddenly, and she anxiously gestured downward.