All along, Lilan thinks that his receptivity is still relatively strong.

Whether it is the technology tree on Zhiyuan Star that has a huge difference in the development of humans and the deep sea, or the unimaginable birth and existence of the ship mother, or even the energy force field of the mimic ship that obviously exists in the scientific world but is completely anti-science, although there was surprise and puzzlement when it first came into contact, but after a short adaptation period, Lilan was still able to accept their existence as much as possible, and tried his best to find a way to use them, or find a way to resist them.

However, this mentality collapsed after seeing the "untouchable presence" in the mouth of the Federal President in that brief communication four days ago......

"What the hell is this......" The black hood with her mouth open had somehow broken away from nearly half, revealing half of her face covered with blazing white runes, but none of the girls saw this scene, just like Lilan at this moment, all their attention was also attracted by the shadow in the distance—or shocked.

It seemed to be asking, but he didn't know who to ask, and in the end, the traverser's almost **-like words spread throughout the communication network: "What is it......"

Everything has to start from the moment Lilan notices the abnormality of the waves.

―――――― Split ――――――

"Lord Admiral, there are anomalous units approaching!"

Eugen's abrupt warning interrupted Rilan's memories, and Rilan, who came back to his senses, almost subconsciously asked: "Bearing, distance, speed"

"Yes" Sensing the sonar and radar arranged under the cabin, the heavy patrol girl quickly replied: "The northeast is about 210km~250km, and the speed is ...... The distance is too far to estimate. But it doesn't seem to be targeting us."

Lilan, who got this value, couldn't help but be stunned, when did even Eugen's ability to find enemies be so strong? The distance of 250km is almost half a signal tower.

Fortunately, it was probably from Richlan's expression that he was thinking, and Eugen quickly explained: "That...... It's under the sea, Lord Admiral."

Under the sea?

Li Lan suddenly thought that if it was under the sea, it was possible. In order to avoid a suicide attack by the submarines of the deep-sea habitat ships in the neutral sea area before, they were enchanted with sonar, even at a long distance.

"Wait—"

Lilan's gaze deflected: "You mean, you detected an underwater unit 250km away at this distance?" ”

Eugen repeated in a low voice: "It's 210km~250km......"

After getting Eugen's affirmation, Lilan's heart suddenly sank.

At more than 200 km, there is not much difference between the two.

According to the enchantment ability on the sonar at that time, it was supposed to "perceive" the underwater units approaching from a distance through the abnormal surge of the water current, and this perception range was limited by three aspects.

First. If the speed is closer, the faster the water will naturally be raised, and the easier it will be to perceive it.

Second, the weather, that is, the underwater environment, if it is near a whirlpool or in a stormy weather, the underwater flow is almost fickle. In that environment, trying to "perceive" a nearby unit is tantamount to a dream.

Thirdly, close to the volume of the unit...... Again, in the case of not being seen. When a person swims underwater, a shrimp rushes behind and a whale is two diametrically opposed concepts, the former is a problem unless he swims under your horizon, or whether he can find it, and the latter, when he is not close to you, the water pressure is enough to throw people out of nowhere.

By the same token, if this thing is big enough. Thanks to the enchantment on the sonar, Eugen was indeed able to spot it 250 km away...... If he could, Lelan hoped it was just his delusion.

The waves seem to be fluctuating a little bit more.

"Where did it go?"

"Yes, in terms of direction...... It should be from east to west, at the current rate. More than 150km in a straight line from the fleet, there should be no danger "

Under normal circumstances, even the diamond gun of the prototype battleship will not fire more than 80km, and if it is an aircraft carrier, it is possible to rely on carrier-based aircraft to carry out super-distance bombing, but as long as it is not the kind of extremely fast artillery bombardment that has no time to react, Eugen is confident that it can intercept it halfway!

After the transformation of Eugen, the increase in anti-aircraft firepower is no less than that of the ship's armament.

It's just that she seems to have forgotten one thing.

Lilan shook his head slightly: "If it's an underwater unit...... It is impossible for the submarine to attack at a distance of more than 5000m, so there is no need to worry about it at all"

The question is, is it possible to be detected at such a distance if it were a submarine?

Gritting his teeth, Lilan pressed the communicator and issued an order to the entire fleet: "Reduce the speed, advance due north at the normal endurance speed, turn on the sonar system, and keep an eye out for units that may be approaching under the sea at any time"

The tone was paused: "Gaga, let your reconnaissance planes out"

"Reconnaissance aircraft...... Can't scout units under the sea? ”

"It's okay, just let them stick to the surface of the sea as much as possible......," he said, and Lilan added uneasily: "Also, let the reconnaissance planes and the fleet be separated a little more and spread out as much as possible."

-- Obviously, Lilan is going to use those reconnaissance planes as a pathfinder.

The girl on the other end of the communicator didn't answer immediately, and Lilan had to continue helplessly: "Don't worry, no matter how much you lose, I will change it to Gale Wind for you later."

Since the gale was reintroduced, the "taste" of the aircraft carrier-level ship on the town guard house has begun to become "luxurious", from the beginning as long as it is aluminum, to half a year ago, as long as it is a carrier-based aircraft, it has become not a gale now......

Sure enough, after getting Lilan's promise, above the Saratoga aircraft carrier in the middle of the rear wheel array, hundreds of carrier-based aircraft sorties were dispatched at the same time, and the buzzing sound that shook Lilan's ears was clouded, and strangely, when he got to the back, Lilan found a part of the Zero bombers in those carrier-based aircraft......

Acquiescing to Gaga's "small abacus", Lilan looked in the direction of the Northern Town Guard fleet on the other side.

The command of the other three carriers - Lexington, Xianghe and Dafeng is not in the hands of Lilan, so they can only rely on Spring Rain.

Fortunately, as the former ship mother, the current admiral, there is still no shortage of basic common sense for pre-war detection, and after a while, the reconnaissance planes on the three aircraft carriers also swept around. (To be continued......)