Blackwater Ocean.

Since the Song Dynasty, navigators have called the Yellow Sea in later generations respectively the Yellow Sea, the Green Water Ocean, and the Black Water Ocean. Roughly speaking, the sea surface from the north of the Yangtze River Estuary to the mouth of the Yellow River contains more sand and the water is yellow, which is called the Yellow Sea; further east

Going east, the sea water is shallower and the water is green, which is called the Qingshui Ocean; further east, where the sea water is deeper and the water is blue, it is called the "Black Water Ocean."

Two days ago, after 20,000 Northern Expedition troops boarded more than 300 large and small ships on the river, the ships sailed down the Yangtze River estuary and straight into the Blackwater Ocean. After sailing for a day and night, at dawn,

The color of the water below the fleet turned blue.

Zhu Guoqiang, who was standing at the stern of the ship in the morning light, held a sextant in his hand and began to measure the latitude. Although he did not know how to sail, he also knew what navigation in this era relied on - experience.

This is also the reason why Li Ying chose the "Black Water Ocean" to go north.

Maritime merchants in the Ming Dynasty often chose Huangshuiyang, which is a near-shore route, to sail northward. This is also the reason why ocean-covering ships are popular. The flat-bottomed ship is more suitable for sailing in offshore areas with many sandbanks. This is the geography of ancient Chinese sea ships.

It is determined by the navigation technique. After all, the most commonly used navigation method by Chinese shipowners is landmark navigation. This navigation method requires the captain to keep in mind the directions and natural landforms of islands, mainland coast landmarks in the area he is passing through, and to be able to navigate from all directions and under various climatic conditions.

identification.

In order to navigate correctly, boatmen must keep in mind the landforms of the sea and the edge of the continent. In order to pass on navigation skills to future generations, some helmsmen drew maps of the conditions of the islands along the route, and used words to describe the landmarks, the water depth of the harbor, and the soil quality of the seabed.

record it.

Only a very small number of ship owners understand the Blackwater Ocean and can sail on the Blackwater Ocean through technologies such as seawater color, wind direction, ocean currents, etc. This is why Zhu Guoqiang needs to recruit the "Peacock Flag" - those ship owners, including Li Ying,

Not only are they proficient in navigation technology, but they are also familiar with the wind direction and currents in various sea areas. They master the top deep-sea navigation technology of this era.

Just like it is the middle of winter now, and the wind is blowing from the north. Logically speaking, the ship cannot go north, but as early as the Song Dynasty, Chinese sails had achieved the goal of "winds come from all directions, but only the head cannot", that is, except for the direction of the head.

, the ship can move in 7 other directions. Therefore, although it is winter, the fleet can still sail with crosswind. This technology was not acquired by Western navigators until after the 16th century through exchanges with Eastern navigation technology.

Mastered.

Almost as soon as the ship entered the black water ocean, Li Ying issued orders from time to time. Under his orders, the sailors adjusted the sails and began to sail against the wind. The fleet followed Li Ying's "Dafu".

Although the voyage was very smooth, after half a day of sailing, Zhu Guoqiang once again used the "nautical clock", which is actually an electronic watch. After measuring the longitude using the "time method", he marked the position on the chart with a ruler.

He found that the speed seemed not as fast as he thought.

"The ship's speed should be around 12 knots. Logically, it should be here by now, but why is it only here?"

Because he did not want to leave his safety to others, before boarding the ship, Zhu Guoqiang specially prepared a sextant for measuring latitude and a "nautical clock" for longitude. With them, he can accurately control the days the ship is at sea.

He even brought a nautical chart. Perhaps the coast of northern Jiangsu was different from the coast a few hundred years later, but there was no change in Liaodong.

Just when Zhu Guoqiang was holding a pen and paper and was wondering, the hatch opened. It was Huimei. As a female "pirate", she didn't have as many rules as ordinary girls, otherwise she wouldn't have taken the initiative to invite Zhu Guoqiang to her ship.

Although the two of them were not in the same cabin, it did not prevent her from coming to Zhu Guoqiang's cabin from time to time. Previously, she had been directing the navigation of the "Jingwei" on the roof of the cabin. After entering the cabin, she saw him lying next to the table and left.

Go and ask.

"What are you looking at?"

"Look at where we are!"

"Do you know where we are? You also know..."

The words stopped abruptly, and Li Huimei opened her eyes wide as she stared at the exquisite sea chart on the table.

"This, is this a chart?"

Li Huimei was dumbfounded by the detailed chart. Although it was just an ordinary simple chart, it was undoubtedly unparalleled in this era. Even if the coast of northern Jiangsu was different, it didn't matter. After all, in this era

The maps...are generally inaccurate.

"This is our location? How did you prepare us to be here?"

"Use this sextant, which can measure latitude, and the marine clock, which can calculate longitude using the time method, and then..."

When Zhu Guoqiang explained these navigational instruments that had to wait a long time to be invented, Li Huimei listened very carefully. Having grown up on a ship, she certainly knew the navigational instruments such as sextant, two-foot gauge, protractor, and parallel ruler on the nautical chart.

Instruments are important to navigation.

After all, the most important thing at sea is to find your bearings.

"Are these things yours? Where did they come from?"

Facing Huimei's question, Zhu Guoqiang did not explain it, but just smiled.

"Do you want to learn? I'll teach you later. However, our speed is too slow. According to the route I drew, at least half of our route is a waste of time."

"It's not a waste of time. You don't know that heading north by wind has its own risks. When sailing on the black water ocean, you need to find the right position. From here to here, it's all about finding the right position..."

Zhu Guoqiang smiled as he listened to Huimei explaining how they found their correct position on the sea.

"We haven't sailed near these navigation points at all now. After all, with these instruments, we can definitely find our position on the sea!"

Pointing to the sextant, two-foot gauge, protractor, parallel ruler and other navigational instruments on the nautical chart on the table, Zhu Guoqiang frowned. All he needed now was to convince Li Ying. But how to convince such an old sea traveler to believe it?

What about yourself?

Seeing the prince's brows furrowed, Huimei thought for a moment and then asked.

"You want to get to Liaodong as soon as possible, right?"

"Well, the faster the better, but the longer the night and the more dreams, the longer it takes to sail on the sea, the worse it will be!"

"Well!"

Li Huimei stood up suddenly and said to Zhu Guoqiang.

"Let's go, Prince, let's go to the cabin roof. From now on, the "Jingwei" will follow the route you told us!"

"Your father's side? There's also a fleet!"

Before Zhu Guoqiang could tell him how to persuade her, Huimei smiled so hard that her eyes turned into crescents.

"As long as my "Jingwei" gains the upper hand, my father will definitely come with me, so just keep an eye on it!"

All right!

There is a good reason! Even if your father is the Pirate King, he is still a slave to his daughter, otherwise he would not have given his daughter a battleship when she was twelve years old!

"Shipowner, look...it's the lady's boat, and she has changed its course!"

The subordinate's report caused Li Ying's expression to change suddenly. He hurriedly picked up the telescope given to him by the prince and looked at his daughter's boat. When he saw the signal from his daughter's boat, he frowned and snorted.

"Follow me, this crazy girl. Once you catch up, I'll deal with her properly. I have to find someone to teach her the rules. Otherwise, how will she be a concubine or a princess in the future..."

...It's even possible to become a royal concubine!

"What the captain said is true. Miss really needs to learn some rules, but the captain..."

As soon as he finished speaking, the young man next to him wearing a scholar's robe smiled.

"Don't forget, the Crown Prince is on the young lady's boat. He may be the one who asked her to change the course,"

As the third master of the Peacock Flag, Shen San certainly knew that in addition to the young lady, there was also the prince on board that ship. Rather than saying that the young lady changed the course, it was better to say that it was the prince who made the young lady change the course.

"It is said by outsiders that the prince is the god of fire who descended to earth. What if the prince can really know the direction on the sea?"

It can be said that Shen San has been famous for a long time. Even in Peacock, there are storytellers telling stories about that man. No one knows whether he is the god of fire. But what is certain is that Miss He obeyed that man's words.

"You are the head of the family. This can be regarded as a husband and a wife."

Shen San's words made Li Ying frown. Although he was happy to see the man on his daughter's boat, when it came to the risks at sea, he couldn't help but worry.
Chapter completed!