Team leader Suihe was startled and was very surprised by Ye Han's order: "Chief, withdraw now?"
"Yes, the drones will stay and everyone will be withdrawn!" Ye Han said.
"Understood, withdraw immediately... Chief, do you need to go in and take a look at the drone?"
Ye Han hesitated for a moment, but he immediately made a decision: "No, just find a place where you can monitor the ice cave."
"clear!"
After the communication ended, Ye Han thought for a while and said on the radio: "Attention all units, our mission is to detect the situation under the ice, not to fight with aliens. If we find any suspected targets, we will use drones to monitor them. Try not to alert the enemy."
.”
"Suihe Group received it!"
"Shihe Group received it!"
"Baoshan Group received it!"
"The Pinghe Group received..."
Each group responded quickly, and Ye Han passed through the sieve one by one. He was relieved when he was sure that all the reconnaissance groups had received the order.
The operation continued, with Suihe Jinyu in front, each group paid more attention to the ice wall, and discovered several ice caves one after another. Some of these ice caves were new, some were old, and one cave entrance was covered with vines.
Half of it was covered. If the soldiers hadn't been careful, they would have missed it.
The soldiers strictly carried out the orders during the reconnaissance process. All targets were monitored with drones, and no one approached without authorization.
Ye Han did not expect that the reconnaissance operation could be hidden from the aliens. He only hoped to delay the aliens from getting the news.
But he never expected that in a corner where the soldiers didn't notice, pairs of eyes hidden under the water were always watching the soldiers' actions. The so-called don't alert the enemy was a joke.
If Ye Han knew that all his actions were under the surveillance of aliens, I'm afraid he would immediately order a withdrawal from the ice.
Fortunately, he doesn't know yet, so the reconnaissance must continue.
No abnormalities were found on the surface of the water. Ye Han turned his attention to the water, but the team members responsible for underwater reconnaissance also found nothing.
Ye Hanke was in trouble. After hesitating for a while, he first ordered all the team members to return to the ice cave where they came from, and then ordered each group to fly a drone into the ice cave where aliens were suspected to be hiding.
Half an hour later, Ye Han called the flagship's communication: "Commander, we found traces of alien activities in the ice cave. Very obvious traces. Unless Europa has evolved intelligent creatures, there is no way to explain it."
Those things in the ice cave.
Huo Qiang asked reluctantly: "Didn't you find any useful clues?"
"No!" Ye Han said, "I didn't find any useful clues, and the enemy didn't leave anything extra. The enemy should have evacuated the ice cave in an orderly manner."
Huo Qiang sighed and looked up at the others: "What do you think?"
Zhuang Bo looked away from the holographic map of the sub-ice space: "It's hard to say anything else for now, but our reconnaissance direction is right."
Wu Han also said: "The enemy has been operating Europa for a day or two. We are new here, so it will not be easy to find this clue!"
Huo Qiang pursed his lips: "Ye Han, what's going on underwater?"
"I didn't find it. The water is too deep. The soldiers rely on naked eyes to observe, and the range they can see is too small." Ye Han expressed his bitterness, "Chief, no one knows how deep this place is?"
Huo Qiang said: "The reply I just received is that the average thickness of the ice on Europa is about one hundred kilometers, and the depth of the sea water is between twenty-five and one hundred kilometers, but this is all calculated using the magnetic field strength.
As for speculation, none of it is accurate."
"Commander, can't you find a way to measure the water depth?" Ye Han glanced at the water surface. Huo Qiang had forgotten that the landing reconnaissance force was not only the first time for humans to land on Europa, but also the first.
Going under the ice for the first time, such a powerful experience, is enough to be written into the history books.
"Think about it." Huo Qiang said, "According to Deputy Commander Zhuang's suggestion, Bei and I have obtained a copy of the sonar drawings and are currently printing the parts!"
"Great!" Ye Han was overjoyed when he finally heard the good news, "How long will it take?"
"It takes about half an hour to finish the parts, and it will take another half an hour to send them over for assembly. It should take about two hours anyway."
The space fleet often carries out long-distance missions, often traveling for months at a time. There is no chance to return to the base during the mission. Moreover, the space on the ship is precious and there is not much space to carry wearing parts.
In order to solve this problem, every human warship has a maintenance cabin. The most important equipment in the cabin is a 3D printer. All the small and medium-sized parts needed by the battleship can be obtained by printing.
Sonar is not a simple part, but a complete set of equipment. In order to speed up, Huo Qiang disassembled the sonar drawings. Each warship is responsible for one or several parts. After printing is completed, it is assembled on the flagship to save time to the maximum extent.
"Understood... Chief, I have seen everything I can see. There is no need to continue to stare at the places I have seen. I want to withdraw the people first, and wait for the sonar to be sent down, and then check the underwater situation... Wait for it
With sonar, the enemy can be dug out even if he is hiding in the water!"
Huo Qiang said: "You just have to figure it out yourself."
"Yes!" Ye Han agreed, suddenly remembering that there was a set of ultrasonic detection equipment integrated into the power armor.
This thing is to supplement the shortcomings of night vision devices and is used to detect underground spaces, but ultrasonic waves seem to be able to detect water depth!
Thinking of this, Ye Han immediately issued an order to let the soldiers responsible for underwater reconnaissance try to see if ultrasonic waves could detect anything.
The soldiers who received the order immediately took action, turned over and got into the water, facing the bottom of the water and turning on the ultrasonic equipment.
This scene was all seen by the eyes hidden in the dark. They were quietly hiding in the darkness without any intention of intervening.
However, in the next second, harsh ultrasonic waves penetrated the eardrums of the mysterious creatures like a magic sound that penetrated the brain. They instinctively turned over and dived into the water. The violent movements caused water splashes, and the layers of water waves spread rapidly.
The mysterious creatures were all hidden in the nooks and crannies of the inconspicuous corners. Although their movements were large, they did not attract the attention of the team members - except for the warrior soaked in the water!
Ultrasound operates continuously, and the feedback information is displayed directly in front of the soldier's eyes. One second the screen was normal, but the next second there were several things swimming at high speed.
The soldier's expression immediately froze. Comparing the two images before and after, it took only one second for the seven or eight targets to dive from the surface to more than ten meters underwater. The speed was staggeringly fast.
This is just a close-up area, there are more abnormal echoes a little further away, and there are more than 40 echoes that can be distinguished.
The soldier jumped out of the water and fell into the rubber boat: "There is something under the water!"
"What?" the team leader asked in surprise.
"I don't know, it's going very fast, and it's swimming underwater!"
