This young man was the best of the first batch of nautical professionals trained by Nie Xiaoyu, named Du Haiwa, and two other people were arranged on Wang Junlin's ship, responsible for navigation.

At this time, Zhang Tiangang finally couldn't help but ask questions about the unfamiliar noun that popped out of Du Haiwa's mouth again.

"That's right, I'm talking about ocean currents."

"The so-called rivers have flows, and so do the seas! Those who have been at sea all year round can know that the same ship, the same cargo, the same calm seas, the same mileage, the time taken to sail with and without currents is very different, sometimes even half the time. ”

"And the cause of this situation is the ocean current I just mentioned, this principle is actually the same as navigating in the rivers on land, if you go down the river on the big river, it will naturally be fast, but if you go against the current, it is like sailing against the current, and it is strange if you are not slow."

"I see, I see." Zhang Tiangang nodded, and the others also suddenly realized.

Wang Junlin also looked at this Du Haiwa, and nodded with appreciation, this son was originally a surviving pirate on Snake Island, he grew up by the sea since he was a child, first fishing, and then as a pirate, he already knows the temperament of the sea very well, and after being trained and studied by Nie Xiaoyu's system professional, he is indeed a nautical professional.

It's just that for some reason, every time he talks about Nie Xiaoyu, the awe and worship of this son is very similar to the expression of mortals when facing the legendary gods and demons.

Seeing that everyone understood, even Lord Taishou expressed his appreciation, Du Haiwa imitated Nie Xiaoyu when he gave them a lecture, drew a line on the chart with charcoal, and marked an arrow, and then pointed to this line and said: "This is the target route we are going to, with this route, we can take a lot less unjust roads, and we can reach the target point in the shortest possible time." You won't run into reefs, and you'll even be able to avoid tornado-prone areas. ”

"I see."

Zhang Tiangang led everyone to nod their heads, Du Haiwa said very clearly, they also understood it, and it can be regarded as a long insight.

Wang Junlin sat in the hall of the big ship, and let Du Haiwa explain some maritime knowledge such as "ocean currents" there, this Du Haiwa looks now

It is true that he has some ability, of course Wang Junlin knows that although this son himself has rich sailing experience, it is Nie Xiaoyu who gave him all this.

The roots of the two coastal currents that Duhaiwa just mentioned are the "Yellow Sea Warm Current", which is an offshoot of the "Kuroshio", the world's second largest ocean current.

The warm current of the Yellow Sea flows northward along the west bank of the Korean Peninsula, and near the Yalu River, due to the action of the Liaodong Peninsula, it turns southwestward, and under the action 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 Bohai Bay, bringing heat and making Qinhuangdao an ice-free port, and then flowing out of the southern side of the Bohai Sea. In the vicinity of Yantai in later generations, it received fresh water from Laizhou Bay, turned into a coastal stream of the Yellow Sea, bypassed Chengshanjiao, and continued to flow south......

If you understand this, you will be able to make the most of the currents.

Du Haiwa continued: "It is already summer, and the weak current in southern Liaoning is enough to make it difficult for boats to sail, and in autumn and winter, the current is twice as strong! At that point, it will be very difficult to get from Pham Yang County or Snake Island to the island we are going to! A round trip, I'm afraid it will take a whole month! ”

For this era, there were very few ocean voyages off the coast, first of all, the sea was unpredictable, the sails of this era were still primitive, and they could not make good use of crosswinds, so they had to go downwind, and if there was no wind, they had to rely on oars to row.

To make matters worse, the loss of land markers also makes the course of the ships problematic, and on daytime and clear nights, the sun, moon and stars can be relied on to judge the direction of the wind, but on cloudy and cloudy nights, the fleet becomes headless flies and falls into a trance...... The unlucky ship is wrecked and killed, and the lucky one finally comes back, which is also the year of the monkey.

"I'll tell you more about the common sense of observing the wind direction at sea."

Du Haiwa was only the lowest-level little pirate among the pirates of Snake Island before, when has she been watched by so many people, not to mention that Lord Kraken has to regard her as the main Lord Taishou watched there, his interest became higher and higher, so he continued: "Right now, in this area of the Bohai Sea, the sea breeze generally blows from east to west, so it takes a lot of effort to sail away, but if it is autumn, it is just the opposite, it can be said that God helps it!" ”

"Heaven help?" Zhang Tiangang frowned slightly and said, "What does this sentence mean?" ”

On the chart that he had drawn with his own hand, Duhaiwa drew a few small arrows, some of them from north to south, some of them just the opposite from south to north, and some of them were circling or from south east to northeast......

Zhang Tiangang and the others looked at these small arrows, their faces were confused, and they didn't know what they were.

Du Haiwa put away the charcoal and said with a smile: "These arrows represent the monsoon on the sea!" ”

Like 'ocean currents', the word 'monsoon' also came out of the mouth of the Siren, and Du Haiwa felt that these words were simply too accurate and vivid, and only the Siren-sama could say such words.

Of course, the word monsoon is not as exaggerated as Du Haiwa imagined, in fact, it is very simple, to put it bluntly, but as the name suggests, because this word is very practical, the so-called monsoon, isn't it the sea breeze that appears with the change of seasons!

"Duhaiva is right."

Wang Junlin saw that the time was not early, and Du Haiwa and the other two navigators took turns to rest well, because during the voyage of the past few days, Wang Junlin, Zhang Tiangang and their guards had nothing to do, and Du Haiwa must be recuperate. So he suddenly spoke up, attracting everyone's attention.

"With the help of the monsoon wind, the sea building ship sails far away, crossing thousands of miles of sea frontier, like a heavenly horse flying, conquering overseas countries, it is as easy as a snap!"

……

……

At night, the sea is more terrifying than the day, deep and unknown, and lurks in countless dangers. Even the most seasoned fisherman rarely sails at night.

But Wang Junlin and his group of 100 ships shuttled through the sea overnight, sailing in the vast sea.

At night, when the moon is missing, Wang Junlin stood on the bow of the ship, looked up at the sky, but saw that the weather was clear and cloudless, the field of vision was extremely empty, and the night sky as deep as the sea.

Du Haiwa slept for three hours in the afternoon, and at this time it was his turn to navigate at night, staring at the stars in the sky, and adjusting the direction of navigation from time to time.

.com。 Wonderful Book House .com