The tracker was very powerful. It relayed signals through satellites. The signal was complex and could cover up to two kilometers.
But this was on land, and the Inuit jumped into the lake. After he went into the water, the signal on the tablet suddenly became poor.
Li Du asked quickly, "Can the tracker be waterproof?"
Young Markelov made an OK gesture and said, "The signal will be worse in the water, but don't worry, it's waterproof."
Indeed, although the signal reflected on the computer was weaker, it was still clearly visible.
They could not go into the water together because the boy had disappeared after jumping into the water, and Li Du was a little afraid of the lake.
Young Markelov came up with an idea. They could take the kayak and track from the surface of the lake. The deepest part of the lake was no more than five hundred meters, still within the range of the tracker's signal.
"Besides, I don't believe this guy can dive five hundred meters. Come on, he has no tools to help him, and no diving device to protect his body. How can he dive five hundred meters, right? "Young Markelov said.
Li Du said, "Be careful, let's follow him."
The signal flickered on the screen for a while, and finally, the red dot disappeared.
At this time, the kayak was in the middle of the lake, not far from the Island of the Lost. The underwater part of the island was still part of the island, but it was at the end of the island, and the water was hundreds of meters deep.
The group on the boat was stunned, and Big Markelov asked, "What's your unassisted freediving record?"
Brother Wolf said, "Mine is about forty meters. Black Bull is an expert in this area, about fifty meters."
"It's at least a hundred meters deep here!" Young Markelov said, gasping.
Li Du said, "Let's not talk about that. The signal has disappeared. What's going on?"
Young Markelov scratched his head and said, "Either the signal is blocked, or the tracker is destroyed. Either way, we can't receive the signal."
Li Du said, "Then write down this position and prepare the diving device. Let's go down and have a look."
"Go straight down?" Brother Wolf asked.
Li Du shook his head. "No, put down the underwater camera first. Mr. Elson sent an ocean exploration robot, right? Let it go down, and we'll see. "
He did not want to take the risk. A hundred meters deep was too scary, and who knew what was under the water?
After all, he was going to be a father soon. He couldn't let anything happen to him. He had to go back to see Sophie and wait for the child to be born.
Soon, the ocean exploration robot was released into the water.
The robot's body was spherical, with multiple wheels and brackets in all directions. It could adapt to the complex terrain of the seabed.
It was connected by a cable, which provided it with electricity and was responsible for transmitting the images captured by the camera.
The robot slowly descended into the water, and there were some cameras following it. These cameras were fixed by the surrounding brackets. Every time it reached a certain depth of water or a predetermined position, the computer could control the robot to release the brackets and release the cameras.
Finally, the robot landed at the bottom of the lake. Then, a strong light shone out, and the scene at the bottom of the lake appeared.
At a depth of a hundred meters, sunlight could no longer penetrate the darkness. If the robots did not turn on the lights, they would not be able to see anything.
The lights turned on, and a blurry image of the bottom of the lake appeared on the screen.
As Li Du already knew, the bottom of the lake was made up of sand and rocks.
Generally speaking, a lake was a dead area compared to the ocean. The fish, shrimp, algae, and other organisms that lived in the lake would die and rot. Over time, they would settle at the bottom of the lake and form a swamp.
However, this was not the case in Lake Angikuni. The sediment at the bottom of the lake seemed to be stirred up by something, causing the lake water to become turbid. The bottom of the lake, which should have been a swamp, was now exposed.
The robot's field of vision was limited. Li Du operated it to move forward, and then after a distance, it was blocked by a stone.
There were some water snails and shellfish growing on the stone, several of which were white with complex and gorgeous patterns.
Li Du hurriedly took out the two shells he had obtained from the teenager and Peter. Not surprisingly, they were exactly the same!
"They should have come from here …" Before he could finish his sentence, the screen suddenly went dark and there was no signal coming back.
This startled Li Du and he quickly operated the robot to return.
At first, he thought something was blocking the camera, but after a while, there was no response. He then understood that it was not something blocking the camera, but something that had taken the robot away.
Brother Wolf retracted the cable that was connected to the robot. Sure enough, the cable was broken and they had lost the robot.
Looking at the broken cable, Brother Wolf said, "It was cut with a sharp knife, and the incision was very smooth."
Young Markelov scolded, "F * * k, who's playing tricks under the water? Change into a diving suit, I'll go down and see what's going on! "
Li Du stopped him. He was not agitated or angry, but laughed easily and said, "Don't worry, I think we're getting closer to the truth. They got rid of the robot, but we still have the camera. "
After another series of operations, several cameras in the water were remotely activated together.
These cameras came with their own batteries, which were used for video recording and lighting. Because the battery did not have much power, Li Du generally did not use the lighting function.
But it was clearly not the time to save power, so he turned on all the cameras that were controlled in the water.
Like a sword thrust into the darkness, the dark bottom of the lake lit up in many places.
One of the cameras happened to be pointing down, and the scene it captured was transmitted back to the computer screen, which surprised Li Du and the others.
In the light, the vast bottom of the lake was not flat, and there were rings of protrusions on it. These protrusions came from the earth's crust, but because they were shaped like a spiral, it was as if there was a whirlpool at the bottom of the lake.
The stone that had blocked the path of the little robot just now came from the protrusions, but because the protrusions were so long and wide, it was hard to see unless you looked down.
Looking at the spiral protrusions, Brother Wolf was surprised and said, "What is this? Is it a spiral breakwater? "
Firecracker pointed to a corner of the screen and said, "Switch, switch to this camera, there's someone …"
Hearing his words, Li Du quickly switched to the view of the camera, but it was too late. When he switched again, the screen was blank, except for a few white fish that swayed their tails and passed by.
In addition, the small screens on the big screen went dark one by one, which meant that the camera had been damaged.
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