all hands on deck for the tour.

"Fire!"

On Jin's command, an engineering warhead torpedo is launched from the orca.

It travels through the water at a speed of about 200 kilometers per hour, aiming at the target.

As a side note, the unit of <> is not used on Ars world because of its different size from the Earth and its different stage of development (international nautical mile = 1852 meters. (International nautical mile = 1852 meters. Equivalent to one minute of latitude on Earth).

Therefore, the <> is not used either, and the speed of ships is also expressed in the metric system.

A word of caution.

< did not overshoot its target and hit it.

And then...

"Oh?

<

And it continues to go straight ......, but it is also a <> torpedo, so it will be retrieved later.

"Oh, it's more powerful than I thought. ......"

"It pierced through the adamantite with ease. ......

"This can pierce most of the opponents.

To prevent it, you need not only a <> but also a <>.

However, you may not think of using < on the first try. It is what is called a first-time-killer.

"If you make a hole with this and break a little inside, <> will admit defeat. ...... and I'll try to make it do a small explosion when it loses thrust."

Said Jin,

"I'm sure that's the first thing I'll do."

"Well done, Jin-dono," he said.

Reinhardt and the also praised him.

Reinhardt then asked an additional question.

"By the way, do you have any other warheads?

"Yes, just in case.

What kind of warheads?

"Well, first of all, we have a . And then there's heat, freeze, and light.

Lights?

"You won't need it this time, but it's a distraction. If we expose the creature to intense light in the deep sea, it might work on it.

"I see."

<> can also be used against living creatures.

is for the tactic we used last time. Instead of drills, it digs holes with engineering magic.

The advantage is that you can dig a hole in a much shorter time than with a drill.

"We have < on board originally."

"That's right. ......"

I think we've taken all the countermeasures we can think of," Jin said.

"If you notice anything, please advise me."

Jin knows the limits of one's own ideas. He knows that even those who are not involved in engineering can come up with ideas because they are not involved in engineering.

But, he is not so lucky to be able to come up with such ideas.

"Well, ...... I can't think of anything for me. ......"

"Hmmm, same here."

"I can't think of anything, Jin-sama."

But as expected, Milowina, who has nothing to do with combat,

"Jin-kun, what would you do if you were in the opposite position?

She asked me.

She asked me what would happen if I were in the opposite position, that is, on the side of the attacker.

"You're right, I didn't explain what would happen in that case, didn't I?

Jin also treats his elders with courtesy. Even close friends have courtesy.

Jin has been guided by the principles of "benevolence, justice, courtesy, wisdom, and trust" that he inherited from his father, the director who brought him up.

That's where he got the name Reiko from.

But that is beside the point.

"As for defense, let's start with the outer panel. It also serves as an armor plate, and is made of 64 light silver on the inside with the shell of a gigantopod on the outside, so it has a heat resistance of 250 degrees Celsius and a cold resistance of 250 degrees Celsius. The cold resistance is -180 degrees Celsius. The coefficient of friction is low, so if the opponent's drill strikes it at an angle, it will probably deflect away without biting into it."

It is slightly less hard than adamantite, but lighter instead. That's why they used it for submarines.

"Physical attacks are prevented by a solid physical barrier."

Jin thinks that the submarine is even more agile than that and will rarely be hit by a projectile.

"That's the dangerous part, Jin-kun."

Milowina warned.

"It's true that its offensive power is first-rate. But the defensive system feels like an ordinary first class ......."

"............"

"......"

Milowina said, but the other members of the were not without their thoughts, <>.

But Jin seemed to think otherwise, and listened intently.

"...... yes."

And then,

"Okay, let's add a defensive shield (Aigis).

He decided to add <> to the list.

Until now, he had thought that he could escape at supersonic speed using the <>, but this time, he could not run away.

So we decided to add a <>, which is the strongest shield.

However, since the consumption of <> is large, it is necessary to install an additional <>.

Since no other opinions were expressed, the members of the "Jin Family" returned to the institute by the warp gate of the cruiser .

Jin and Reiko go to the dock and start to remodel the returned .

"Reiko, you hold that side."

"Yes, Father."

Basically, Jin can do this work alone, but having him hold and support me makes the work even more efficient.

Reiko also feels blissful when she is able to help Jin.

Knowing this, Reiko helps Hitoshi with even the simplest tasks.

"Father, we're done here."

"I see. I'm done here too. Thank you.

<> to was completed in 15 minutes.

After that, a simple test was conducted, and it was confirmed that there was no problem at all.

Satisfied, Jin returns to the laboratory.