Ye Han was very satisfied with Luo Qi's creativity and asked him to immediately organize manpower to make a few more. All base areas must be included in the monitoring range. Each listening box must be assigned a dedicated person to monitor, and no blind spots must be left.
Luo Qi immediately obeyed and took several soldiers to run from warship to warship. In order to enhance the monitoring effect, each warship needed at least eight to ten listening boxes, which kept him busy for a while.
The ground listening box near the Shuhai was first put into use. As soon as the soldier in charge of monitoring adjusted the radio to the monitoring band, he heard a dull explosion. Before he could recover, it happened again.
Only then did he remember that Ye Han seemed to have just ordered the underground bunker inside the encirclement to be blown up... Unless the inside was blown up, his listening box would have no use.
Although the situation was a bit unexpected, the soldier still reported the situation in time, letting Ye Han know that the listening box was of no use for the time being.
After Ye Han received the report, it didn't matter much, but out of caution, he still ordered the entire division to be more vigilant to avoid being attacked by the enemy.
The blasting operation in the encirclement went very smoothly. Servants mobilized from all directions began to advance inward from the edge of the encirclement. When they encountered underground bunkers on the way, they immediately surrounded them. The accompanying paratroopers then used a small amount of explosives to blast open the chrysanthemum gate, and then
Throw a large explosive bag into the hole.
If one explosive charge fails to collapse the hole, throw in a few more until it collapses.
Moreover, it is not that the cave was collapsed and ignored, the servants surrounding the cave did not withdraw, but continued to surround the cave and wait for orders.
During the advancement process, it is not that no noble troops emerged to resist, but the diameter of the hole's exit is limited. Three or five enemies drilled out at one time are too many.
All the enemies were ruthlessly crushed by the coalition forces.
After a while, the enemy simply stopped coming out and allowed the coalition forces to blow up the exits of the underground bunkers one by one. After a while, all the bunker exits in the encirclement were sealed.
But this is not over yet. The Noble Army's ability to dig holes is too strong. There is no need to worry about exits. As long as the Noble Army wants to, they can create new exits anytime and anywhere.
If you want to completely eradicate the noble army in the encirclement, you must use some special means.
So after the coalition forces blew up the last exit, the officer leading the team made a few gestures and asked the nearby servants to withdraw first, leaving about two squads of paratroopers to surround and seal the hole in the middle of the encirclement.
The platoon leader who led the team waited for all the servants to retreat, then gestured to a soldier, and the soldier immediately took out a nuclear mine not much larger than a plate from his backpack!
He jumped down to the bottom of the pit with the mine and carefully placed the mine at the bottom of the pit with incredibly gentle movements.
After putting down the mine, the soldier immediately jumped out, took a long breath and made an evacuation gesture.
The platoon leader immediately ordered the troops to evacuate, not just the hole, but everyone together.
The paratroopers who received the order immediately signaled to the nearby servants, and the troops on both sides evacuated quickly. After everyone retreated to the warship, Ye Han gave the order to detonate.
A dazzling bright light suddenly burst out in the middle of the encirclement, and then a ball of flames exploded instantly. The battleship rocked along with the ground, and a large amount of soil and gravel was thrown into the air.
The yield of nuclear landmines is extremely small, only twelve tons when fully loaded, but their power is indeed not small. The thrown ore will cover the entire battlefield after falling.
If Ye Han hadn't ordered the gun truck and landing craft to hide in advance, there might have been losses due to this small nuclear explosion.
The nuclear explosion came and went quickly. After all the soil fell, a huge explosion crater appeared in the middle of the encirclement. Although the situation underground was invisible, it was definitely not much better. I dare not say that the encirclement was completely destroyed.
The underground structure underneath can at least destroy the shallow passages.
Ye Han thought that nuclear landmines were useful, so he simply ordered the troops to place another one in the explosion pit. If the enemy used the method of drilling holes for a sneak attack, he would directly detonate this nuclear landmine to prevent them from being killed!
As soon as the order was conveyed, Ye Han received a report from Luo Qi. The nuclear explosion was very exciting, but more than half of the installed listening boxes were damaged in the nuclear explosion, and only the outermost ones were barely usable.
of.
Ye Han quickly ordered Luo Qi to repair it quickly. After thinking about it, he gave Luo Qi a severe punishment.
The ground listening box is not a troublesome thing. As for the possibility of running away with people? Just give the solution to the first group and the second group and let them do it themselves.
So Ye Han gave another order. After a while, all the listening boxes were installed, forming an invisible monitoring network.
Monitoring is no longer one person per listening box, but uses communication equipment to turn all listening boxes into a whole. All monitoring nodes are monitored through programs. If any abnormal sound is found in any listening box, the alarm will be triggered immediately.
The time is too short to compile a special program for this equipment. However, the ground listening box operates through sound, and in order to facilitate the attack on underground bunkers, the fleet is equipped with a batch of ultrasonic radars for underground cave detection!
The working principles of the two devices are very similar. With the help of biochips, programmers who accompanied the army modified the ultrasonic radar receiving program and used it on the monitoring network to great effect.
But because the effect was so good, a lot of jokes were made. First, the sound of several paratroopers landing triggered the alarm, then the steps of two servants carrying ammunition in the bottom of the battleship triggered the alarm, and then something fell to the ground.
, the alarm is triggered again.
The continuous accidents were simply torture. The technicians had to urgently modify the program, find ways to filter out the noise from the paratroopers and servants, and try their best to avoid false alarms.
There is no difficulty in modifying the program. Regardless of footsteps or other noises, they all have fixed sound frequencies. Just let the program ignore the frequency of the noise.
The programmer had just filtered out the footsteps when he suddenly heard a sound like scratching the wall. The sound was weak but continuous, which immediately attracted the programmer's attention.
Through cross-detection of the listening nodes, it was finally determined that the sound came from more than 40 meters deep underground, and it was probably the sound of the enemy digging a landslide!
Probably because the sound was too weak, it failed to trigger an alarm!
This is not good news. The programmers quickly increased the sensitivity of the monitoring network. However, since the depth of the sound source was relatively high, it should not be a precursor to an attack. After the programmers recorded the frequency of this sound, it was set as the key monitoring frequency.
.
The programmer had just completed the settings when the monitoring network issued an alarm again. Several people thought it was an accidental trigger again. They opened the monitoring record and planned to load the frequency into the filter band. The programmer in charge of filtering suddenly discovered that the sound source came from outside the encirclement!
