This young man was one of the best among the first batch of navigation professionals trained by Nie Xiaoyu. His name was Du Haiwa. He and two others were assigned to Wang Junlin's ship to be responsible for navigation.
At this time, Zhang Tiangang finally couldn't help but raise questions about the strange term that popped out of Du Haiwa's mouth again.
"That's right, what I just talked about was ocean currents."
"As the saying goes, rivers have currents, and seas have currents! Anyone who has been at sea all year round will know that the same ship, the same cargo, the same calm sea, the same mileage, the time taken to sail when there is an ocean current and when there is no ocean current are very different.
It can even save half the time.”
"The cause of this situation is the ocean current I just mentioned. This principle is actually the same as sailing in rivers on land. If you go down a big river, it will naturally be faster. But if you go against it, it will be like sailing against the current. Only if you are not slow will you
Strange."
"I see, I understand." Zhang Tiangang nodded, and the others also looked enlightened.
Wang Junlin also looked at Du Haiwa and nodded with admiration. This boy was originally a pirate who survived on Snake Island. He grew up by the sea since he was a child. He first fished and later became a pirate. He has a good temperament for the sea.
I know very well that after being systematically and professionally trained by Nie Xiaoyu, I can indeed be called a navigation professional.
I just don’t know why, but every time I talk about Nie Xiaoyu, his awe and admiration are very similar to the expressions of mortals when they face the legendary gods and demons.
Seeing that everyone understood and even the prefect expressed their appreciation, Du Haiwa imitated Nie Xiaoyu when she gave them a lecture, drew a line on the chart with a charcoal pencil, marked it with an arrow, and then pointed at it.
Tiao Xian said: "This is the target route we want to go to. With this route, we can avoid a lot of unnecessary mistakes and reach the target point in the shortest time. And we will not run into rocks, and we can even reach the target point in the shortest time."
Avoid places prone to tornadoes."
"I see."
Zhang Tiangang led everyone to nod their heads. Du Haiwa spoke very clearly and clearly, and they could understand it, and it was considered that they had gained a lot of knowledge.
Wang Junlin sat high in the hall of the big ship and allowed Du Haiwa to explain some maritime knowledge such as "ocean currents". This Du Haiwa now looks like
He was indeed somewhat capable. Of course Wang Junlin knew that although this boy had rich sailing experience, it was Nie Xiaoyu who gave him all this.
The two coastal currents Du Haiwa just mentioned are both rooted in the "Yellow Sea Warm Current", which is a branch of the "Kuroshio", the second largest ocean current in the world.
The Yellow Sea Warm Current flows north along the west coast of the Korean Peninsula. Near the Yalu River, due to the influence of the Liaodong Peninsula, it turns southwest. Under the influence of the current of the Yalu River, it becomes stronger and rushes directly into the Bohai Bay!
This warm current will circle along the coast of the Bohai Bay, bringing heat and turning Qinhuangdao into an ice-free port. Then it will flow out from the south side of the Bohai Sea. Near Yantai in later generations, it will receive fresh water from Laizhou Bay and become the coastal current of the Yellow Sea.
, bypassing Chengshan Corner and continuing to flow south...
Once you understand this, you can make full use of ocean currents for sailing.
Du Haiwa continued: "It is already summer, and the ocean currents in southern Liaoning are weak enough to make navigation difficult for ships. In autumn and winter, the ocean currents are twice as strong! By then, if you want to set off from Fanyang County or Shedao to our
The island we want to go to is really difficult to get to! A round trip will probably take a whole month!"
For this era, there were very few ocean voyages away from the coast. First of all, the sea was unpredictable. The sails of this era were still primitive and could not make good use of crosswinds. They had to go with the wind. If there was no wind, they had to rely on oars.
Draw.
To make matters worse, after losing the land markers, the ship's heading has become a problem. During the day and clear nights, you can rely on the sun, moon and stars to judge the wind direction, but on cloudy days and cloudy nights, the fleet becomes
If you catch a headless fly, you will get lost... If you are unlucky, your ship will be destroyed and everyone will be killed. If you are lucky, it will be the Year of the Monkey and the Moon of the Horse when you finally get back.
"Let me tell you some common sense about observing wind direction at sea."
Du Haiwa was just the lowest-level little pirate among the Snake Island pirates before. When had he ever been noticed by so many people? Not to mention that the prefect who regarded him as the master was watching over there, and he became more and more interested.
The higher he got, he continued: "At present, in this area of the Bohai Sea, the sea wind generally blows from east to west, so it takes a lot of effort to sail long distances. But if it is autumn, it is just the opposite. It can be said that God has helped me.
Of!"
"God help me?" Zhang Tiangang frowned slightly and said, "What does this sentence mean?"
Du Haiwa gently drew some small arrows on the chart he drew by himself. Some of them were from north to south, some were just the opposite, from south to north, and some were circling, or from south to east.
direction...
Zhang Tiangang and others looked at these small arrows with confused faces, not knowing what they were.
Du Haiwa put away the charcoal and said with a smile: "These arrows represent the monsoon on the sea!"
Like 'ocean current', the word 'monsoon' was also spoken by Lord Siren. Du Haiwa felt that these words were so accurate and vivid that only Lord Siren could say such words.
Of course, the word monsoon is not as exaggerated as Du Haiwa imagined. It is actually very simple. To put it bluntly, it is just as the name suggests, because the word is very realistic. The so-called monsoon is the sea breeze that appears with the seasonal changes!
"Du Haiwa is right."
Wang Junlin saw that it was getting late, and Du Haiwa and the other two navigators took turns to have a good rest, because Wang Junlin, Zhang Tiangang and their escorts had nothing to do during the past few days of navigation, and Du Haiwa must
He had enough energy. So he suddenly spoke up, attracting everyone's attention.
"With the help of the monsoon wind, ships can sail across thousands of miles of sea, just like flying horses, and conquer overseas countries with ease!"
…
…
The sea at night seems more terrifying than during the day, deep and unknown, with countless dangers lurking. Even the most experienced fishermen rarely sail at night.
But Wang Junlin and his group of hundreds of ships shuttled across the sea overnight, sailing in the vast sea.
At night, when the moon was waning, Wang Junlin stood on the bow of the boat, looking up at the sky. He saw that the weather was clear and cloudless, and the field of vision was extremely empty. In the night sky, which was as deep as the sea, there were no stars after the lights of later generations.
The Milky Way looks exceptionally clear and beautiful, and the stars also appear to be unusually numerous.
Du Haiwa slept for three hours in the afternoon. Now it was his turn to navigate at night. He stared at the stars in the sky and adjusted the navigation direction from time to time.