Daming One Piece

Chapter 113 Buying and Selling (first update, please recommend, please collect)
Following an order, the trainees on the side of the ship picked up the sextant one after another—all were hand-made by coppersmiths in Beigang, and the precision may not be as good as Shi Yiwen's "decoration", but it can be used to make do , no matter what, the calculation is more accurate than that of European counterparts.

"Pay attention to the angle between the sun and the sea level..."

On the side of the stern of the Black Wind, Li Siyi held a copper sextant and learned how to measure latitude with the explanation of the young master.

Li Siyi, who is over [-] years old, used to be a student in Shenyang and has always loved arithmetic. He even studied European mathematics through "Elements of Geometry" and other European mathematics books. The fastest, and the fastest to learn.After all, it's just a simple formula.

"Report to the captain, we are now at the northern latitude..."

After Li Siyi calculated the latitude, Shi Yiwen just nodded slightly.

"Well, very good, the current time is 35:[-] am in Beigang, you can calculate our longitude..."

The so-called Beigang time is only a temporary substitute. As for the prime meridian of longitude, we can’t still use Greenwich. According to Shi Yiwen’s plan, the future prime meridian should start from either Beijing or a certain observatory in Nanjing. Beigang, but it's just a makeshift.

These things come slowly.

Moreover, the "clock method" to measure longitude is only temporary. There is only a 200 yuan electronic watch in the supermarket, and there are too many monks and porridge. Competent for measuring longitude.

What is the only possible way?
Only the "lunar distance method" is left, which is to use the movement of the moon to measure longitude.However, the "lunar distance method" requires a lot of astronomical survey work. First, an accurate star table must be drawn to find out the positions of all the stars at all times, and then find out the orbit of the moon every day. Only after completing these two tasks can it be possible to use this method for maritime positioning.

This requires knowledge in various aspects such as mathematics and astronomy.In other words, what the clock method needs is the improvement of watchmaking technology, and what the "lunar distance method" needs is to train a group of mathematicians and astronomers.And both take time!
Fortunately, Shi Yiwen's worst thing right now is time.Moreover, there are more than 200 electronic watches in the supermarket, so that he will not be lost at sea now.Whether it is improving the watchmaking process or cultivating talents in astronomy and mathematics, it is inevitable for development.

Take your time!
First build a school to train some talents.Anyway, there is plenty of time.It is only 1626 now.

During the next voyage, Li Siyi, like other trainees, continued to learn navigational knowledge including latitude and longitude measurement, and even needed to learn how to operate cannons with the sailors.

Yes, unlike the sailors of the Ming Dynasty Merchant Ship who simply learned how to operate cannons in the past, Shi Yiwen specially compiled a set of operation manuals for sailors to practice operating cannons. After all, the core reason why England was able to run amok in another world It can shoot!
Ever since, in the following voyage, no one on board can be idle. In addition to practicing gunnery, the sailors also have to grind the deck with a millstone. Their energy is exhausted, enough to make them have no energy to play cards, gamble, and of course it is impossible to make trouble.

A few days later, the fleet sailed into Hoi An. Unlike the last time they came to Hoi An, this time the fleet just entered the port, which really shocked them.

"Mr. Shi's "Black Pearl" is back!"

Of course, the first to enter the port was the smaller tonnage "Black Pearl". These schooners were clearly different from the European-style galleons and Ming-style hard sailing ships. Once they entered the port, they attracted everyone's attention. .

"Why did you come back so soon?"

People tipped their toes curiously and looked at these ships. Last month, when the two ships "Black Pearl" and "Black Wind" left the port against the wind, they were dumbfounded, and some even pouted , muttering under their breath that they were "overthinking their own abilities."

I never thought that not only are they back in good condition, but they also have two more boats
"But there doesn't seem to be much cargo on this ship. Look at the draft of this ship?"

"Oh, haven't you heard that Mr. Shi's business is different from other people's. What they do is cannon business. Do you know what a cannon is? A cannon can sell for thousands of taels of silver!"

While people were chatting there, the officials at the dock looked at the fleet that had just entered the port with smiles on their faces. Of course, they did not forget to inform the county officials. As for the other families, they must have received the news .

"Master Shi is back, so fast!"

Li Guinan said in surprise.

"No, the people on the pier were dumbfounded. You must know that he went back against the wind. Not only did nothing happen, but he came back alive. The characters in the court are really different! "

Li Yi couldn't help but exclaimed.

"It's no wonder that the Three Treasures eunuchs were able to go to so many places back then. The imperial court must have treasures that can be used at sea that are not available outside."

"Impossible. If there was such a treasure, it would have been sold out long ago."

Glancing at his son, Li Guinan said.

"Hong Mao Fan's boats are also good at going against the wind, but under normal circumstances they still don't want to go out to sea against the wind and the current. It would be risky to go out to sea like that, but this Mr. Shi is different. He actually went out to sea against the wind in a big way. Maybe he really has the ability I don't have any patience..."

"Father, he didn't seem to bring anything with him this time."

Li Yi said as if thinking of something.

"He didn't bring much goods last time."

"It doesn't matter."

Li Guinan laughed.

"He didn't bring a lot of goods, but they were all good things. When he left last time, he said that he brought at least a hundred cannons this time. If they were all Hongyi cannons, these cannons alone would be worth 10 yuan. Two!"

While saying that, he said again.

"But he must have other things with him, and we will know soon, but what he brought here has little to do with us. The most important thing is how his business is going."

What is this deal?
Of course it is food.

After all, for Ming merchants in Hoi An, what they care most about is the income from Mr. Shi's trip, and whether the grain business can last for a long time!

(End of this chapter)