On the morning of June 13th, after breakfast, Jin headed for the Ermee River.

Of course, he is accompanied by Reiko, Marcia, Rodrigo, and Tiberio.

The boat is assisted by the golem maids from Nido Castle. Two boats are being transported, one requested by Barbara and others by Jin.

Since this is a report on the completion of the request, the experimental boat is left at the workshop.

It was a brisk morning in early summer, and a few girls had come to the Erme River to gather magi sand.

There were only a few of them left, but they could still collect enough to earn a little extra money.

"Oh, there's Jin-san!　Marcia-san!

And Leco!

Uncle Rodrigo and Tiberio!

"Ah, a boat!"

It's a lively crowd.

"Good morning, Patty, Jesse, Jenny, Nonna."

Marcia had become good friends with them.

"Are you going to take a dip?"

"Yes, I do, Nonna."

The youngest Nonna is four years old this year. She is the daughter of Jeff and Seema from the village of Lalio.

"If I do well, everyone will be able to ride with me," she said.

"Yes, I'm looking forward to it!"

Patting Nonna's head gently, Marcia started the test with the trimaran she had built.

"Oh, it's so stable!"

Jin, who was watching from the shore, was impressed by the way the boat ran in spite of the swift current. Rodrigo folded his arms and looked at his daughter's boat with satisfaction.

"Isn't it?　We've made a lot of minor adjustments."

Tiberio came to Jin's side and told him about Marcia's difficulties.

"Of course. It's just like Marcia."

Marcia had gone so far upstream that she was out of sight from where Jin and the others were standing,

"Yeah, you're doing great!　Now we can deliver!"

She is in a good mood.

She makes a U-turn at the edge of the pool.

"Yeah, I think the slight reduction in the length of each hull and the slight rounding of the hull bottom is helping.

Satisfied with her behavior, Marcia moves down the river at twice the speed. In no time at all, she passes the area where Jin and the others are, and heads downstream.

She makes a U-turn, this time in a place where Jin and the others can see her.

"Oh, that's a smooth move!"

Marcia is pleased to hear Jin's voice.

She then follows the river upstream again, slowly approaching the shore and landing on the sandy beach.

"Yeah, yeah, that's great, Marcia. You did a great job!"

"Well, I'm glad to hear you say so. Next is a boat I made at Jin's request.

It's a rubber-boat style boat.

Let's go!

It's light enough that Marcia can carry it by herself.

All right.

Once the boat is on the shallows, Marcia starts the outboard motor.

This is also an aqua thruster, not a screw propulsion system.

"Oh, the directional stability is better than I expected.

Jin looks at the boat,

"We experimented with various boat shapes," Tiberio told us.

Tiberio told us.

Since the boat has a flat bottom, the shape seen from above, rather than the shape of the bottom, has an effect.

"We were told that by making the bow part of the boat less resistant and the stern part of the boat more resistant, we could ensure directional stability in swift currents."

"I see."

While I was listening to his explanation, the style boat was moving up the Hermes River.

And this time, it turned around in front of Jin and the others.

The flat bottom of the boat offered little resistance to the change of direction, and the outboard motors were turned to the right side.

"I see."

Then he went down the Hermes River, changed direction once more, and landed on the shoal.

"How is it, Jin?

"Yes, very well. Thank you, Marcia.

Jin now knew that the job had been done.

All that remained was to ensure safety. It is the duty of Jin, the lord.

"You should always wear a life vest when you go on a boat."

We could make them out of foamed Maggi polyethylene, or for short, Jin thinks.

"And a boatman golem. Of course, it should be good at underwater activities, just in case.

While Jin was thinking about this, the children of the village gathered around.

"Hey, Mr. Jin, can we go on the boat now?

"I want to ride on it!

Jin couldn't say no to the children who were all asking for the same thing,

"Reiko, please steer the boat temporarily."

He asked Reiko to help him temporarily. Reiko would be able to save the child in case he fell into the river.

"Yes, father."

Reiko gets into the boat, which looks like a rubber boat.

"Marcia, how many people are on board?

Jin asked,

"I think five children can easily fit on the boat. I'm sure that Reiko will be able to steer the boat.

He answered, "If Reiko can steer the boat, I'm sure it will be safe.

Jin then called out to the children who were there.

"Then we can all get on. ...... you can all get on the boat that Reiko is on.

"Yay!"

I'm with Reiko!"

They all get on the boat.

"Here we go!"

Reiko announced and started the outboard motor.

Unlike the screw type outboard motor, the aqua thruster type outboard motor generates enough thrust even when the boat is on the shore, and the boat is slowly moving away from the shore.

"Whoa!　It floats, it floats!

"It's fun!"

With the children's cheers, Reiko's boat moved up the Hermes River at a considerable speed, passing a bend in the river and disappearing from the sight of Jin and the children.

"Well, you're still great, Reiko, Jin!　You've already mastered that boat that you got on for the first time!

Marcia sounded half impressed and half dismayed.

"Well, it's Reiko. I'm going to go to ...... and get some data from Reiko to make a golem to steer the ship."

"I see, you are indeed a djinn."

While we were talking, a boat that had made a U-turn upstream came back.

It passed in front of Jin and the others at a very high speed.

"Jin-san!　Marcia!

Uncle Rodrigo!　Tiberio!"

The children on the boat shouted and waved.

Seeing their happy faces, Jin was glad that he had built a boat for sightseeing.