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The meeting on the 24th began with Rodrigos question.

Lord Jin, based on yesterdays explanation, is it Wind Magic Strong Wind for the Wind Magic Propulsion Device Wind Thruster? What was it, um, water molecules? But cant it be done like air?

The question had some unclear parts, but the intention behind it was clear to Jin.

In other words, can we make it so that it doesnt change the propulsion force even if it gets water on it?

Yes, thats it!

When the Wind Magic Propulsion Device Wind Thruster is attached to the side of the hull, in rough waves, it inevitably sucks in water. Each time this happens, the propulsion force fluctuates, making it difficult to move straight, especially during slow forward movement, which can be problematic. Thats the reason.

It might be possible.

If he answered immediately, it would sound too much like a lie. So, Jin, being careful not to make it seem like he had avoided doing it, responded.

Oh, really! In that case, Lord Jin, could you consider improving that? We will proceed with the discussion on the hull with the remaining members.

Sure.

So, Jin was alone, though accompanied by Reiko, working on the improvement of the Wind Magic Propulsion Device Wind Thruster in a separate room.

Elza looked a bit disappointed as she watched Jin go to the separate room.

Father, is it really that difficult?

Reiko had a curious expression. Jin reprimanded her.

Shh, your voice is loud Improving something like that can be done in two minutes. But doing too much would make it stand out, and thats not good, you know?

He seemed to be aware, at least a little. It might sound strange, but its likely that voices saying, Isnt it too late now? could be heard.

I understand.

So, Jin and Reiko worked together to partially dismantle the Wind Magic Propulsion Device Wind Thruster prototype created yesterday. Then, Jin contemplated in front of it.

However, what he was thinking about was a different matter.

Even if its not a geostationary satellite, if markers are buried on top of mountains or something, it could serve as a landmark, but theres still the possibility of being dug up

I think thats a possibility.

Since strong magical power makes it easier to be detected, its only natural. Thats why Jin is fixated on satellites.

Um, its quite difficult to make it completely stationary relative to the earths surface. Precise calculations and accurate measurements are required for that.

Jin, thinking not only about the teleportation target but also about establis.h.i.+ng landmarks for aircraft and s.h.i.+ps, gradually s.h.i.+fted his thoughts towards considerations for the navigation technique he was currently developing.

By the way, in s.h.i.+p navigation, its not just a compa.s.s, right? What was it um a quadrant or s.e.xtant?

Roughly speaking, lat.i.tude and longitude can be determined based on the time and the suns position, and the lat.i.tude can be determined by the alt.i.tude of the North Star. With lat.i.tude and longitude, one can know their own location.

Slowly, his thoughts s.h.i.+fted towards considerations for the navigation technique he was currently developing.

Reiko, does this world also have a North Star?

Jin wasnt particularly knowledgeable about stars. Reiko, using the built-in ManaCom communication device, contacted the Old Man and answered Jins question.

Yes, there is. A star with almost no deviation.

Earths North Star is actually slightly off from the celestial North Pole, appearing to move in a slight circle, acc.u.mulating errors over time.

I see. Then, I can confirm my position with the North Star at night.

No, you can see it during the day too.

Huh?

Reikos words were shocking to Jin.

Jin is well aware that Reiko has much better eyesight than humans. However, he never thought stars could be seen during the day.

With vision acuity of 6.0 or 7.0, it seems stars can be seen during the day. However, Jins vision is about 1.5, so its impossible.

However, in this world, where the air is clearer than on Earth, its not strange that stars can be seen during the day with Reikos eyesight.

In that case, if I create a dedicated instrument, it should be possible to calculate the position from the time, the suns position, the moons position, and the North Stars position

Setting the time at the laboratory on Hourai Island as Longitude 0 and using Hourai Mean Time (HMT), all that is left is measuring the angles and making calculations.

This will solve the fleets navigation.

Jin notified the Old Man of the idea that just came to him and decided to have the details worked out.

I understand. Ill try making a prototype.

Now, the issue is over here.

While it might be good for the Hourai Island fleet, Jin switched his thoughts back to the ongoing project.

A compa.s.s is essential. In that case, we should avoid using iron components as much as possible on the s.h.i.+p.

Modern s.h.i.+ps use a lot of iron components, making the magnetic compa.s.s p.r.o.ne to deviation. Therefore, for the s.h.i.+ps compa.s.s, Jin decided to use a magnetic compa.s.s instead of a gyro compa.s.s, which would be too advanced. Hence, he wants to avoid using iron components as much as possible.

As he was pondering this, Reinhardt and Elza arrived.

Jin, whats up? Its already lunchtime.

Jin-nii, are you immersed in thoughts again?

It seemed lunchtime had come without him realizing. Jin headed to the conversation room with the two. Lunch had already been delivered, and everyone except them had already started eating.

Feeling hungry, Jin sat down and immediately started eating.

The menu for the day included bread, sauted freshwater shrimp and vegetables, sweetened sweet potatoes (ItoPo), and fruit juice.

Jin, how is it? I guess its rude to ask?

After finis.h.i.+ng the meal and having a second serving of juice, Reinhardt asked. The others listened intently.

Uh, yeah. Ive got a rough idea. Now, I just need to try making it.

As expected, youre amazing!

Reinhardts praise was met with silent agreement from the others. It seems that everyone became convinced of Jins abilities during the previous day.

Ive made quite a bit of progress too. In the afternoon, I plan to start discussing the interior. Depending on the interior, there might be some minor changes to the hull as well.

Ah, thats true By the way, who is handling the model processing?

Since Jin is working on the propulsion system alone in a separate room, someone must be responsible.

Who do you think?

Smirking, Reinhardt glanced briefly at Elza.

Is it Elza?

Nodding slightly, Elza blushed, seemingly aware of Reinhardts playful smile.

Well, she is Jins top disciple after all. Her processing speed and accuracy surpa.s.s mine. Everyone was impressed.

Really

As Jin stared, Elza blushed even more.

While this was going on, the break time came to an end. Jin informed Reinhardt and Elza that he wants to use a magnetic compa.s.s, so they should avoid using iron components as much as possible.

I see, got it. Ill keep that in mind.

With that, Reinhardt and Elza headed to the afternoon discussion meeting. Jin returned to his task.

Now, lets finish up the propulsion system.

For Jin, it was a straightforward task.

If wind magic affects air molecules and water magic affects water cl.u.s.ters, what about earth magic?

The answer is particles. Earth magic works on everything from the molecular level to rocksbasically any ma.s.s or lump.

In other words, by utilizing magic like the Stone Bullet series, which affects lumps, propulsion can be generated regardless of air, water, dust, etc.

But there are drawbacks.

Muttering to himself, Jin modified the prototype.

It has poor fuel efficiency

Working on lumps means that there is a loss when trying to use it on air molecules. Its like using a large dump truck to transport a tennis ballone can imagine the inefficiency.

But, Father, you can improve it, right?

Inserting a comment into Jins soliloquy was Reiko. It was a phrase full of trust in Jin.

Of course.

Jin grinned.

Just add three magic formulas to the Magiformula. A judgment formula to determine the size, a sorting formula to categorize into three stages, and a control formula to adjust the force based on size.

In other words, an idea to apply suitable force to solid, liquid, and gas. With this, the efficiency would be improved to the point where it could be compared to the original Wind Thruster.

After all, its my Father!

Listening to Reikos praise, Jin rewrote the Magiformula and rea.s.sembled the Wind Thruster. No, its not the Wind Thruster anymore.

Right, lets call it Jet Thruster.'

Thus, the s.h.i.+p propulsion, the Jet Thruster, was completed.

With the remaining time, Jin pondered various methods for confirming the current position.

I see! If we bury markers in places so deep that they cant be dug up, that could work!

If the sky is not viable, he thought inverselydeep underground might be.

As long as the magical pattern is unique, and its only detectable to the extent of faintness, no one would bother digging it up.

In this way, Jin continued to implement new ideas in the intervals.