When Su Yun was halfway through, the cursor in the radar disappeared. Pen & Fun & Pavilion www.biquge.info

You know, even the more advanced radar essentially relies on electromagnetic signals as a way to transmit information, and this signal has very little attenuation in the air, and can be accurately observed from tens of kilometers away, but it is different underwater. The deep ocean is like a natural barrier that cannot be penetrated by light waves, and the only "eye" is sonar that works with sound waves.

Therefore, the radar detection distance of the "Zao" is very far from the surface of the water and even the sky, but if the target dives deep underwater, the signal may be lost within 100 meters, and it is not worth making a fuss.

Fortunately, Su Yun had already marked the target point, so even if the signal disappeared, he did not stop.

If the signal disappears, the target has dived underwater, but if it is a deep-sea expulsion with no intelligence and only a hunting instinct, after discovering the target and making an attackable judgment, all they can do is launch a ferocious charge, and will never dive in like they are now. In other words, the owner of the signal that appeared in the radar range just now is definitely not a small fish and shrimp in the deep sea.

That's interesting.

Su Yun knew that the big fish in the deep sea were all connected in pieces, and if he could catch one, he might be able to catch a whole fleet.

Immediately, he turned on the ship's sonar, and with a regular slight tremor, under his field of vision, the outline of the deep ocean appeared to be bright and extinguished, including the large number of swimming fish in the sea, which could be seen clearly. The water depth here is about 1,200 meters, the bottom of the sea is rugged, and apart from many large fish, Suyun has not found any foreign objects.

Su Yun slowed down the speed of sailing, and at the same time turned on the signal shield, allowing himself to "disappear" at sea.

At this time, it is not a wise choice to expose yourself again.

Fifteen minutes later, the clock on the ship's installation had just reached 3:51 p.m., and Su Yun's coordinates on the chart coincided with the marked point, and directly below this was the location where the target disappeared not long ago.

Do you want to go down?

Su Yun didn't rush to make a judgment, the sensing distance of the sonar in the water is extremely far, even if it is thousands of meters away from the bottom of the sea, it can clearly feedback a lot of information.

He kept the ship's gear hovering at a low speed, leaning down slightly, observing the underwater topography in this area.

The topography of the seabed and the land is not too different, and there are also towering seamounts, undulating hills, rolling ridges, deep trenches, and open abyssal plains. The area southwest of Yokosuka, or the entire Sakurajima Sea, belongs to the junction of continental plates, so the seabed here is not very smooth, and you can see ups and downs everywhere, but the sea area where Suyun is located is relatively flat, at least there are no islands nearby, and there are no steep seamounts in the topographic scan from the sonar.

Even so, the seabed is incredibly complex.

Directly below Su Yun, there is a huge submarine rift, the contours of the seabed scanned by the sonar form a hollow like a knife and axe, and around it is a huge depression basin, on the surface of the seabed, the deep-sea plants, rocks and corals are densely packed, and there are several huge shadows wandering in the deep sea, according to their physical characteristics, it should be fish, not the deep-sea fleet.

On the surface, there doesn't seem to be anything abnormal, but the deep trench really makes people have to be a little suspicious.

It's a pity that the three caves of the deep sea cunning rabbit, the more advanced detection methods of human beings have long made them not so easy to capture, if they can see all the mysteries from the surface, they are estimated to have been defeated in the protracted war. In other words, even if he was wearing the Zao ship suit, observation could not give Su Yun the information he needed, so how should he choose?

After pondering for a long time, Su Yun made a decision.

He sorted out the precise coordinates of the site, the process of the anomalous signal he found, and the simple conditions of the seabed, summarized them in simple language, and uploaded them to the mission feedback mailbox, then turned on Zao's oxygen circulation device, and fell into the sea with a "poof", disappearing into the water. After experiencing the battle to defend the town, he was extremely confident in his mysterious strength, not to mention that he had a ship that was decades more advanced than the original Nake, and there was really no reason to continue to maintain the mentality of cowardice.

Wealth is in danger, not to mention that even if he really encounters the main nest of the deep sea, Su Yun is confident that he will get out safely.

……

Through the air between the shield force field, Su Yun could still feel the cold touch of the seawater.

1300 m ......

The pressure is getting higher and higher, Su Yun has never dived into such a deep sea water, although compared to those 10,000-meter trenches, this place is still not worth mentioning, but he has already noticed that the shield energy has begun to decline slowly, although the drop is extremely small, there is no need to worry too much about it in a short period of time. But the most critical problem is the health of the engine, Su Yun's ship is not a professional submarine, it is designed to be used in water combat, even if it can enter the water, it is often used for tactical evasion, and it is an unreasonable thing to forcibly rush into such a deep sea water like him.

Therefore, as we go deeper, although the buoyancy remains the same, perhaps due to the increase in water pressure, as the only place on the ship that cannot be fully protected by the force field, the pressure on the engine cannot be completely offset by the shield.

Su Yun was still slowly deepening, but the sound of the engine had changed significantly, becoming more and more dull.

And at this time, he had just reached the edge of the trench.

He kept his eyes open, and with the help of the ship's equipment, with the cooperation of the hydrophone device, he tried his best to observe everything around him, and at such a close distance, the effect was naturally much better than observing on the surface.

But until this time, Su Yun's radar no longer showed any deep-sea signals.

There are only two possibilities for this to happen, one is that there are really no large number of deep-sea warships gathered in this area, and the other possibility is that they are all outside the radar detection range of Su Yun.

After all, in deep water, sonar cannot penetrate obstacles, and radar is like changing from 2.0 vision to 1000 degrees of high myopia, as long as it is far away from hundreds or even tens of meters, it is difficult to detect signals. Therefore, at this time, Su Yun, in addition to personally feeling the huge claustrophobic pressure brought by the real deep sea, must also be on guard against possible enemies at all times.

Su Yun slowly floated directly above the trench, but even at this position, the sonar information from below the trench still couldn't determine whether the signal he received came from the bottom of the trench.

"Tsk......"

Su Yun thought about it, but decided to give up diving.

This place is too deep, and it would be embarrassing to wait for yourself to change into a set of submarine equipment, otherwise it would be too embarrassing if something goes wrong with the engines and you are trapped in a trench that is not a smooth road.

Fortunately, Su Yun did not come here in vain, he took out the remaining underwater listening devices carried by the ship, and then drifted all the way along this trench, throwing them into it separately, and after making sure that they were operating normally, he decided to call it a day and return. Looking at the time, it took a full hour to dive into the deep sea this time, and it was close to 5 o'clock in the afternoon.

It's time to go back to dinner, in any case, I have completed the investigation task assigned by the Navy Headquarters, and I have overdiscovered a suspicious target, no matter how it can be counted, it cannot be said to be a dereliction of duty.

However......

Just as Su Yun reduced the output of his engine and the ship's equipment began to slowly float, his radar system suddenly hummed.

Dense points of light continued to appear in the compass in Su Yun's field of vision, as if the sky was lit up with stars in the dark night, and for a while, the claustrophobic and deep sea seemed to be illuminated by the light points.

These points of light are approaching at a rapid pace.

Su Yun saw clearly, they were not deep-sea warships, but ......

Deep Sea Mine!

Su Yun's pupils suddenly constricted, and he reacted immediately.

He boosted the engine to the maximum, but instead of pushing it downward, he rushed to the surface like a rocket.

If you don't die, you won't die!