Turbulent Times Chapter 1030: Astrology and Latitude Disk

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Wang Junlin followed Du Haiwa's example and stared at the stars in the sky for a long time, only to feel his eyes sore, and those stars were also confused with each other, and it was not easy to distinguish them one by one.

He knew that Du Haiwa was using the "star-stretching technique" to determine the direction, and sometimes Du Haiwa would look at the compass fixed in front of his eyes.

Du Haiwa is obviously a leader trained by Nie Xiaoyu, so he will never get confused when looking at the stars in the sky. For Du Haiwa, although the galaxy in the sky is extremely vast, the stars are in the eyes of others They are as innumerable as grains of sand, but in his eyes, they are as familiar as the palm lines on the palm.

"That is the Big Dipper."

While watching, Du Haiwa made sure that there was no problem with the sailing direction of the sea-going ship, and then pointed out to the officers and soldiers of the navy next to him. There are 500 people, and there are 4,000 sailors sent to the two islands of Xinde this time, including four captains, eight regiment leaders, forty hundred commanders, and 200 fire commanders, so the regiment leader can be regarded as a senior general official.

"Look, what does the Big Dipper look like together? Does it look like a spoon for soup?"

"That's right, it really looks like a spoon." Everyone nodded after looking at it carefully.

Du Haiwa raised her finger to point to a row of stars in the sky, drew dotted lines with her finger to connect them, and called out their names one by one.

"Following the direction of my finger, these seven stars are called Tianshu, Tianxuan, Tianji, Tianquan, Yuheng, Kaiyang, and Yaoguang respectively. You don't need to remember these names, but this shape You must memorize it well, at least you must be able to distinguish it immediately when you look up."

After everyone nodded and said yes, Du Haiwa said again: "Look again, if you connect a straight line between Tianxuan and Tianshu on Doukui, and then extend the distance five times toward Tianshu, you can Find a star so bright that it eclipses the stars."

Everyone looked at it carefully, and they all suddenly realized, and they all claimed that it made the dead sea even more alive.

"That is the Beichen star, where all the stars live. We believe that the ultimate purpose of the Big Dipper is to accurately find this Beichen star, and then use the Beichen star to confirm the position of the north."

"So that's how it is." Zhang Tiangang, who was listening a little fascinated, suddenly realized.

The sea is permeating, boundless, without knowing things, there is the sun during the day, but at night, you have to rely on the stars to enter. Polaris, this is the natal star of every navigator. It is located at the north celestial pole, and its position is almost unchanged. It can be used to distinguish the direction. Du Haiwa wants to teach everyone the "star-drawing technique" to perform calculations around Beichen , is the most commonly used method.

"At this time, there is no moon to smear the light, and there is no cloud to cover it. It is a good time to use the star-stretching technique. The method I taught you the day before yesterday, everyone should try it out."

Wang Junlin is on the big ship, in addition to his 100 guards, there are 400 sailors and soldiers. According to the basic requirements of Wang Junlin's first navy, if you want to become an officer above the regiment leader, you must learn the star-stretching technique , Now I have the opportunity to be taught this technique by Du Haiwa, who is the most proficient in star-gathering technique. The four centurion commanders and all the fire chiefs on the ship have studied it very seriously.

Everyone is holding a "star-leading board", which is made of peach wood, a total of thirteen pieces, together like a fan, the largest one is thirteen fingerboards, and the smallest is one fingerboard. Of course, this star board was written by Nie Xiaoyu. Originally, she had something more advanced, but it was limited by the poor knowledge level of people in this era, so she couldn't understand it at all. An easy-to-reach star board.

The centurion leader and the fire chiefs are no strangers to the star board. They have been trained on Snake Island. The surface of the star-leading board is perpendicular to the sea level, and the height of Polaris from the sea level is observed. The height is different, and it can be adjusted and used with thirteen boards.

And next to each person, there are two sailors as assistants, one holds a fire to light, and the other writes down the observed data for him on paper.

It is not easy to complete the measurement on the rickety deck. After the measurement, everyone returned to the cabin. According to the measured height, using several calculation formulas in mind, they obtained the distance between the North Star and the ground. The included angle, and then give the result to Du Haiwa.

After checking one by one, Du Haiwa ridiculed those who were not accurate, asked them to go out to retest, and praised those who were more accurate.

Speaking of arithmetic, it has become the knowledge that ordinary soldiers must master to become an officer above the fire commander. There has been a military training class on Snake Island. In addition to teaching officers literacy and learning tactics and strategies, the main thing is to learn arithmetic .

Wang Junlin noticed that the correct calculation was praised, and he was delighted, while the wrong calculation was depressed.

Wang Junlin was also happy to see this group of people studying so hard. He knew that this was the effect of the reward and punishment system he had researched and formulated with Nie Xiaoyu.

After the star-stretching technique, Du Haiwa took out a wooden disc the size of a head from the cowhide backpack she carried with her, placed it on the wooden platform in front of her, and said, "This is called the latitude disc, and it is the most important disc in the navigation technique." A difficult knowledge point. If everyone can learn the calculation method of dimensions, according to the regulations of our navy, even if the ability in other aspects is poor, they will be given the same treatment as the leader of the group. So far, the first person trained by Sir Siren Among the group of people, only nine people have learned the method of calculating latitude through the dimension disk. As long as everyone learns this method, they can regard the sea as a smooth road and never lose their way.”

During the three-day visit to Snake Island, Wang Junlin saw this thing in the hands of Nie Xiaoyu. According to Nie Xiaoyu, the latitude disk she finally made was not like this. Unfortunately, no one can learn it, so she He also researched such a latitude disk that can be integrated with some contemporary Taoist knowledge.

"This latitude disk structure is divided into two parts, divided into the sky disk and the earth disk. The large and outer square disk is the earth disk, and the circular disk inside the earth disk is the sky disk."

"Among them, there is a bucket in the sky plate, which refers to Tiangang. The second is the twelve days, and the twenty-eight mansions and four-dimensional bureaus are listed in the middle. As for the land, there are twelve days, eight stems, five elements, thirty-six birds, and heavenly gates. People's gates and ghosts end at four corners."

Du Haiwa is one of the nine who learned how to operate the latitude disk. While introducing it to the fire chiefs and hundreds of people who looked at him with adoring faces, he compared the sky disk with the data measured earlier. , The scale on the site, get the position.