Five hundred and fiftieth chapters the wind is fierce
Besides, judging from the fact that both the emperor and his father agreed with Han Du to try this new strategy, Tang Ding felt that there should be no problem with Han Du's strategy.
The two wanted to say something more, but were interrupted impatiently by Tang He.
"Okay, stop talking. Get ready to sail."
At Yuwa's order, as the ropes were thrown down one by one, the warship was freed from restraints. The tall sail was pulled up and the direction was slowly adjusted.
The majestic warship like a mountain, like a giant beast crawling on the water, began to slowly move out of the pond. The pond was directly connected to the Yangtze River, and the warship followed the pond straight into the Yangtze River.
Relying on the fierce river wind, the warship headed straight for the mouth of the sea.
The departure of the warships naturally attracted the attention of the people on both sides of the Yangtze River. After all, such tall ships are rare, and there are three brand-new ships. However, the Ming Navy has too many ships operating in the Yangtze River. These are only three ships.
That's it. Dozens or hundreds of more ships were dispatched together, with their masts covering the sky and the sun. The people didn't know how many times they had seen it, and it was no longer surprising to the people.
After entering the sea, the warships were fully equipped with sails, showing the majesty of galloping. These three warships all used pointed bottom ships, watertight cabins, and balanced rudder technology. Once they entered the sea, their speeds were even higher than in the Yangtze River.
A big chunk.
The sea was rough, but on the warship it was like walking on flat ground.
Tang and Han Du even set up a low table, placed a few dishes of side dishes, and started drinking.
Taking a sip of the soup and wine, he asked Han Du thoughtfully, "How are you going to wipe out the Japanese pirates?"
Han Du put down his wine glass, glanced at Tang Ding, and said with a smile: "Of course the soldiers are smart and quick."
"How to say?" Tang He asked thoughtfully.
Seeing that Tang Ding was here, Han Du didn't mind spreading some things to him, so he said: "Above the sea, you can see everything at a glance. It is difficult for two armies to confront so many strategies, and there is no place to ambush. Unless it is like something like
Where there are islands, otherwise once the two sides meet, the stronger will win. However, as long as you are fast enough, you can retreat calmly even if you encounter a stronger one."
The most important thing is speed, Tang Ding nodded a few times.
"The other thing is that the ship is strong and the guns are powerful. There is nothing to say about this. You can take this opportunity to experience it." Han Du did not explain too much. This was originally proposed by himself, and it has not been through actual combat.
Too much seems a bit excessive, it is better to let Tang Ding take advantage of this opportunity to see for himself.
Han Du took out something with a smile and put it on the short table.
Tang He saw the strange appearance of this thing and couldn't help but ask: "What is this?"
The iron thing is shaped like a fan, but it is completely different from a fan.
Han Du explained, "This is called a sextant."
"What's the use?" Tang He frowned and fiddled with it twice before holding it in his hand, but he didn't know how to use it.
"It's similar to a compass. It's used when sailing on the sea. A compass can point north and south, but this sextant can tell us where we are on the sea."
"You, what you said is true?" Tang He straightened his back. If what Han Du said was true, then the effect of this thing would be too great. Why didn't the Ming navy dare to go deep into the sea to pursue it?
Japanese pirates? Isn’t it because once you go deep into the sea, it’s difficult to determine where you are? How can you chase Japanese pirates if you don’t even know where you are?
As for why the Ming Dynasty was able to send ships to the Japanese country in the early years, it was because the Ming Dynasty knew in which direction the Japanese country was. As long as there was a compass to determine the direction and kept going, it would naturally reach the Japanese country. The Japanese country would not move, but the Japanese pirates would.
"Of course," Han Du nodded, and then said, "But it's not that easy to determine the location."
Han Du spread out a map. Different from ordinary maps, this map was filled with thin lines that intersected vertically and horizontally.
"This is a newly carved part of the whole map of the world. I drew these lines starting from the axis of the Chengtian Gate of the Imperial Palace."
Then Han Du taught Tang He how to use a sextant, look at the eyepiece, point the other mirror at the sun, use the sea level as the benchmark, turn the scale until the image of the sun appears on one side of the sea level, and then write down this
The scale of time.
"Is this how we can know where we are?" Tang He was confused and puzzled.
Han Du smiled and said: "Of course it's more than that. We also need to calculate a number, and then compare it on the map to roughly know where we are. However, the deviation in this calculation is still very large. We want to be more accurate.
One point, then we need to record the position of the sun every day of the year. If we measure on that day, we will compare it with the position of the sun on that day, so that it is accurate after all. But now we don’t record the position of the sun.
Therefore, I can only record it day by day from now on."
Tang He looked at the map, then picked up the sextant and tried it. He had to admire Han Du's ingenuity. At the same time, he shook his head and said, "We don't need to record it."
Han Du was stunned when he heard this. If we don't record it, who will?
Seeing Han Du's puzzled look, Tang He couldn't help but said: "Have you forgotten what the Qintian Prison does? Aren't they just recording the positions of the sun, moon and stars every day for hundreds of years? Do you want the position of the sun?
There must be records in the Qintian Prison, and not just for one year, but for hundreds of years in the past."
yes!
Why did he forget about Qin Tianjian? Thinking of this, Han Du felt annoyed because he should have thought of it a long time ago.
Tang He couldn't help complaining to Han Du, "You said you have some good things, but you like to hide them. Who would reach out and snatch your things? If you had taken this thing out earlier, I would have gone to Qintian
The supervisor has brought the things."
Han Du disagreed with Tang He's statement that he didn't know how to grab things. Didn't he grab his own things? But this matter was indeed caused by Han Du's own shallowness. If you want to blame it, it's the existence of Qin Tianjian.
The sense of existence is really too low. Since the last time Qin Tian Jian was defeated by Han Jingyun, the sense of existence has been even lower. Han Du didn’t even take Qin Tian Jian seriously. After all, there are so many people in an organization, and they can’t compare to him.
What qualifications does a girl who has studied mathematics for several months have to attract Han Du's attention?
But Qin Tianjian is not only proficient in arithmetic. You must know that observing the stars is their duty. Arithmetic is just a tool to assist them in observing the stars.
But now no matter what you say, it's over. The warships went out to sea with the original purpose of raiding the Japanese pirates. Is it possible to send people back to get the star records from the Qintian Prison before setting off?
Tang He sighed and had no choice but to say: "That's it, it's better than nothing."
"That's all we can do." Han Du gave an embarrassed smile. Han Du was so embarrassed that he almost dug out a three-bedroom apartment with his toes on the deck.