"Tubes 1 to 6 are filled with acoustic torpedoes, and tubes 7 and 8 are filled with erosion torpedoes. Pen? Interesting? Pavilion wWw. ｂiquge。 info" Unlike Shinano's jerky and scrambled command, Iona is clearly controlling I-401 (it's no nonsense).

At the same time as all eight torpedoes were released, four long dark blue flames suddenly erupted from the engine vent at the stern of the I-401, and the speed of the submarine, which was already in a state of stop, soared rapidly in a short period of time, dragging out a long series of blisters in the pitch-black water, and quickly sailed forward.

Compared with the large warships on the surface, the submarine is far weaker than the other side in terms of firepower and protection, and the bombardment with the artillery fire of the deep-sea heavy patrol under the condition of exposing the position is undoubtedly a kind of death behavior for the Yi 401. And what Iona has to do now is to escape from the enemy's range as soon as possible, relying on her own stealth advantage in the sea, waiting for the opportunity to launch a sneak attack, to achieve a fatal effect.

The purpose of releasing the acoustic torpedo is to affect and interfere with the sonar system of the deep-sea heavy patrol through the high-explosive noise generated by its explosion, so that it cannot determine the specific location of the I-401, in order to escape from this sea area before the arrival of the depth charge. As for the two erosion torpedoes, again, with the help of the local detection equipment in a state of disorder, it may be possible to hit the enemy quietly.

"Damn." The deep-sea perch, who had completely fused with that special equipment and the entire battleship, felt an explosion in her ears, and the super harsh noise shocked her whole person a little dizzy. The next two torpedoes also hit the deep-sea heavy cruise, but due to the obstruction of the energy crystal wall, they were completely annihilated before they could touch the layer of forced fluctuating armor covered by the surface of the hull. However, because the energy crystal wall that protected the entire battleship was completely destroyed, if you want to expand it again, you can only wait until the energy generator is fully charged. This is undoubtedly fatal for any warship, because with forced fluctuating armor alone, it cannot fully resist ordinary artillery fire, let alone an unconventional weapon like an erosion torpedo.

"Little ghost, you've me off completely."

"Click, click" With the sound of mechanical operation, the armor on the upper surface of the Deep Sea Heavy Patrol suddenly shrank to the left and right, and the tail of countless small shells suddenly sprayed orange flames, and after flying away from the Deep Sea Heavy Cruise, it suddenly turned around and plunged into the sea, and at the same time, in the middle of the Deep Sea Heavy Patrol deck, a huge turret slowly rose.

"Activate the energy crystal wall."

Suddenly, a net-like protective shield lit up around the Yi 401, intercepting all the strange shells that still had super high speed in the water.

"The energy crystal wall can only last 60 seconds, we have to find a way to escape from here." Shinano stared at the surveillance screen with an extremely solemn expression, and as waves of shells continued to hit the I-401, the entire submarine had been in a violent shaking, and the progress bar representing the maintenance time of the energy crystal wall was also rapidly declining.

Because of the activation of the energy crystal wall, this directly caused the Yi 401 to continue to maintain supercavitation navigation, so their current speed is only 40 knots, which is not enough to get out of the opponent's range within 60 seconds.

"That's it, the Gravity Cannon." The voice still sounded soft and glutinous, and as the submarine continued to make various evasive actions in the sea, trying to reduce the chance of being hit by shells, Iona, who was standing on the square command platform, was also constantly bending over, turning sideways from side to side, looking quite cute, but on that delicate and abnormal little face, it was still a facial paralysis that looked innocent.

"Hypergravity cannon." Shinano's heart was suddenly startled, and his eyes stared at the monitor directly in front of him without blinking, and from the data on it, it could be seen that there was an abnormal energy fluctuation in the position of the Deep Sea Heavy Cruise.

"Iona, turn off all active and passive sonars, and the entire battleship goes into silent stealth mode."

As for the super gravity cannon, although Shinano has not seen it with her own eyes, she has heard it from Feng Xiang's mouth, this is a kind of ultra-conventional weapon that is far beyond the scope of science and technology in this era, and it is not an exaggeration to say that it is a great killer weapon. Not to mention Iona, who is only level 150, even the unfathomable Dean of Hindenburg in her eyes has said that no matter what modification the Sea Mist battleship has undergone, it is impossible to carry the attack of the supergravity cannon.

However, the I-401 is not a surface ship, it has relative concealment in the sea, as long as all active and passive detection equipment is turned off, so that the enemy cannot capture the reflected waves on the I-401, then the opponent will not be able to lock onto the target. In this case, no matter how powerful the supergravity cannon is, what can it do, if it misses the target, everything is a floating cloud.

"Nope." Iona shook her head.

"Why?"

"The energy crystal wall also emits reaction waves."

The Energy Crystal Wall is an extremely powerful protective ability, which is quite important for warships. But again, it has a big drawback.

It is well known that any shield formed by energy will cause fluctuations, and the energy crystal wall is no exception. The fluctuations it produces can be quite drastic, and although they cannot be detected by the human ear, they can be easily detected by either sonar or radar. Although this disadvantage is really not a problem for ships on the sea, no matter how stealthy you are, where else can you hide. Then a huge battleship floated on the surface of the sea, so close that even a blind man could see it. But for submarines that are under the surface of the sea and pay great attention to concealment, this shortcoming is undoubtedly fatal.

Once the Yi 401 unfolds the energy crystal wall, this is no different from turning on the active sonar, which is equivalent to actively exposing its position to the enemy. But if you don't open the energy crystal wall, let alone wait for the enemy's super gravity cannon attack, it would have been beaten into a sieve by such a dense ordinary cannonball attack earlier.

Therefore, the situation at this time is extremely unfavorable to the Yi 401, although closing the energy crystal wall will improve the stealth performance of the Yi 401, but under such dense firepower, it is difficult to ensure that it will not be hit by those ordinary shells. And if the energy crystal wall is not closed, Yi 401 is equivalent to a living target driving underwater, and it is always locked by the super gravity cannon. Regardless of whether the energy crystal wall is closed or not, the Yi 401 will be hit by the shells of the Deep Sea Heavy Patrol, and neither of the two attacks can be carried by the Yi 401.