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　On Horai Island, preparations for the installation of an undersea base were steadily underway.



"If they're going to make it this sophisticated, why not just make it a submarine or a spaceship with high pressure resistance instead of a base?"

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"Well, Reinhardt does have a point, but that's just his own way of thinking, you know."



　As for Jin, it was only a <, and the ability to move around was an <.

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"First of all, I'd like to set one up as a test case," he said.

"That might be a good idea. That might be a good idea. We might find some problems or defects that we couldn't find on the desk.

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　Thus, I decided to install <> at a point on the equator at 20 degrees west longitude on the map of Horai Island.

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　The procedure is to send <> to the sea at that point by a transporter. The will remain on board as a member of the crew.

　At the same time, 50 <> are sent as installation personnel.

　 dives under its own power. will check for any problems during the process and report to the old man in Horai Island.

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　When they reach the bottom of the sea, they fine-tune the location of the installation under the instructions of the old man.

　Once the location is determined, the <> digs a hemispherical depression in the seafloor where the <> will fit in.

　The > is inserted into the depression and fixed in place when the level has been adjusted.

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　< is tested.

　It takes about two hours.

　This is what it looks like.

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　The most time consuming part is the diving. The next step is to prepare the installation site.



"We can't just send it into the ocean."

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　Jin said.

　The transporter cannot send an object into solid or liquid.

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　< at the destination using a , but when the force rod is released, 95 atmospheres (gauge pressure) is suddenly added from 1 atmospheric pressure, so even Jin hesitated.

　Incidentally, gauge pressure is defined as atmospheric pressure set to 0. In other words, it indicates .

　Depth gauges and pressure gauges used by divers display gauge pressure.

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　Therefore, with aboard was sent out to the sea area in question, and 50 were transferred without a moment's delay. The 500 were transferred to the area.

　< poured water into the ballast tanks and increased the specific gravity of the entire ship to 1.2, which is heavier than the standard specific gravity of seawater of 1.023. The submarine was then submerged using a force field generator.

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　The speed was about 0.5 meters per second. In other words, he can dive to a depth of 950 meters in less than 32 minutes.



"Yes, the distortion of the body due to the increase in water pressure is to be expected.

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"It's probably due to the adamantite structural material."



　Jin and his team are checking the information coming from .

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　So far, they have confirmed only what they expected.



So everything is going well.

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"That's right. It would be better if there were no unexpected events.



　As Jin and the others watch this conversation, <> touches the seafloor. It is stabilized by the force field generator.

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　Immediately, the <> that had been diving with them begins to work on the installation site. The engineering magic <> takes only a short time to complete.

　There was almost no deviation in position, only a 40 meter deviation to the west from the location of <>.

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　The location was completed in 15 minutes. Incidentally, the tailings from the installation are to be sent to Horai Island as a sample.

　< moved 40 meters by itself and settled into the hemispherical depression.

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"Okay, let's level it and fix it."



　This took five minutes.

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　Once leveled, the gap is filled with some of the tailings from the previous step and <> is secured in place.

　Engineering magic <> was used for this as well.

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"Okay, let's test the operation."

"Okay, I'm going to go check on the tailings they're sending us.

"I think I'll go this way."

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I'll go with Saki then

I'll go that way too.

I'll go this way.

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I'm going this way too.



　Jin, Reinhard, Elsa, and Bertsch are at the undersea base.

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　Saki, Goose, and Hanna are going to see the tailings sent to them.



Saki, Goose, and Hannah go to see the tailings.

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"Hmmm, this is the rock and ore on the ocean floor.

"It looks the same."

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　Just to be safe, the ore is sent in a clear cubic zirconia container. The reason for this is that there might be some unknown pathogen in them.

　The boxes were packed in the .

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　So far, no organisms have been found. After this, we will check for pathogens.



"<><><><>...... there is no problem, we will apply sterilization just in case."

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　The man who checked it out was <, who acted as his assistant.

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"Thank you. Do you know the composition?"




"Yes, Mr. Saki. The rock is granite and mottled rock with quartz, feldspar, hornblende, pyroxene and biotite. The minerals were magnetite, hematite, quartz, and rosacea.

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"I see, so iron and manganese are the main elements."

"I see. Iron and manganese are the main minerals."

"I'd like to get a sample of the magi crystals too."

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　Since no unknown pathogens were found, we will continue to collect samples while being careful about quarantine.

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* * * *



　Meanwhile, Jin and his team are observing the situation at <>.

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"Yes, all functions are in good condition.

"Yes, all the functions are in good condition and there seems to be no pathogens. Well, let's leave the management to the golems for the time being. We should sterilize it periodically.

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　Since Jin is a duplicate and Erza and Reinhardt and the others are homunculus, it is unlikely that they will be affected by pathogens, but since there is a possibility that they will infect other Ars humans, strict measures must be taken.

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"The other functions are also in good order."



　Jin nodded his head in satisfaction.

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"From now on, can we say that we are on duty ......?　Anyway, two <> each will take turns filling in at >. Is that clear, old man?"

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　This means that one of the detection networks is up and running.

　It will take some time to build up the network, but we have taken the first step.

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　The old man reports further.

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, one of the submarines that seems to belong to the will arrive soon. What do you think? >>

"Yes. ....... Bring it to the dock at Tatsumi Bay."

Oh, that'll be fun.

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Yeah, that'll be fun too.



　Jin and the others are very busy.

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　The island of Horai is now full of activity.