v3 Chapter 266： Underwater ruins (1/2)
Latest website: It ’s June and the sun is still abundant, so the three of them felt a little stuffy wearing wet suits when they were on the boat, but the stuffiness disappeared after entering the water, especially as the depth increased, The temperature also began to gradually decrease.
Because the thermal conductivity of water is much higher than that of air, people lose more heat in water than on land, but fortunately, there are diving suits to protect against the cold, and leisure diving like this generally does not dive too deeply. , Because of the pressure, every 10 meters of diving in the water will increase an atmospheric pressure, more than 30 meters there will be danger of drunk nitrogen (common recreational diving cylinders are mainly filled with compressed air, which is 21% Of oxygen and 79% nitrogen, the high pressure will allow nitrogen to fuse into the body. Similarly, the oxygen breathing under the high pressure for too long can cause oxygen poisoning).
The underwater site where Zhang Heng went to this time is about 25 meters in depth. This depth is basically not dangerous. The water that Zhang Heng has trained in the black sail copy does not have any equipment. You can dive to this depth in one breath. Of course, in that case, he doesn't care how long to stay below. Basically, if you see the ruins, you have to go back to breathe.
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 that was a pure parent-child leisure, the depth of the dive was less than eight meters, and the time spent underwater was short, only 20 minutes, and there were Accompany by coach.
Really, when Zhang Heng was wearing equipment to stay underwater for a long time or in the Apollo training camp, NASA used the underwater environment to simulate weightlessness. Zhang Heng not only had to stay underwater, but also had to receive from there. The console commands perform a series of operations.
So returning to the water, Zhang Heng didn't feel strange.
Whether it is the feeling of weightlessness or the quietness underwater, almost all sounds are isolated from the seawater. Every diver can basically only hear their own inhalation and exhalation sounds when diving, especially exhalation. When the air is angry, the bubbles pass through the sea water, and the whistle when it floats upwards is quite reassuring.
Nelly was indeed as competent as she said, always staying no more than two meters away from the two, watching the physical and mental conditions of the two closely, and confirming that they did not encounter any trouble when diving. He made a gesture, pointed to the ruins not far away, and let the two follow her.
In fact, it is not necessary for her to specifically indicate that it is difficult to ignore the sight as long as she dives into the water. This is a huge undersea palace or a pyramid-shaped building, which is very dilapidated in appearance, and is said to date back to about 10,000 BC.
If this submarine site was built by the people who lived here, their level of production technology may have reached the level of the Egyptians at the time of the pyramid construction, but we must know that the latter occurred around 3,000 BC.
This is why many experts firmly believe that the stone-built building is just a coincidence of nature, but after seeing the neat stone steps and the smooth and right-angled rock wall, Han Lu is more willing to believe it It is really a relic left by a mysterious lost civilization.
She even saw traces of suspected gates and roads.
Nelly made a gesture to make Zhang Heng and Han Lu lean closer, and she picked up the underwater camera, helped them and the underwater ruins in front of them, and then swam toward the door.
Han Lu followed by a video recorder, while Zhang Heng watched the time and direction on the dive computer, and then followed.