In the Bohai Sea, five lucky ships were separated by a few hundred meters, looking at each other and sailing quietly amidst the rough waves.
On the 'Taishan', Tian Erniu basically no longer gets seasick because he found a way to divert his attention, that is, to get busy.
I walked around the ship, constantly inspecting every situation, and focused all my attention on the work on the ship. I quickly got used to it slowly.
"Uh~"
The situation of Silly Bear is still not very optimistic, and even looks a bit serious. However, Silly Bear seems to be stimulated by Tian Erniu’s words. While he is seasick and vomiting, he keeps carrying heavy objects to divert his attention, and he even holds it in his mouth.
Ginger slices rely on the pungency of ginger to stimulate your brain nerves and relieve the symptoms of seasickness.
Most of the people on the boat were in the same situation. Some quickly adapted to the bumps on the boat, some were born with no seasickness, and some were just like Silly Bear. The situation was a bit serious, but they still continued to persevere.
.
The sun gradually set in the west, and the afterglow of the setting sun turned the place between the sea and the sky into a fiery red world. It was so beautiful and spectacular that Tian Erniu was stunned.
“It’s so beautiful!”
Tian Erniu couldn't help but sigh softly.
Soon, night falls, and the silver moon hangs high in the sky, casting down a ray of cool moonlight. Under the moonlight, everything becomes darker and hazy. Only the lights from other adjacent ships can make it clear.
You feel a slight sense of security.
Otherwise, in such an environment, people will feel lonely and feel as if they have been abandoned by the world.
Tian Erniu took out a pen, paper, compass, and sextant. The pen was a black charcoal pen specially made by Liu Jin. It was not an ink pen. It was bumpy all the time on the ship. Naturally, it was impossible to use an ink pen. It had to be
Making something like a pencil makes it easier to write.
Needless to say, the compass has always been used for feng shui. It is not difficult at all to make a qualified compass without any technical content.
The real magic of navigation is the sextant. The sextant was first invented by Europeans in the 18th century. It is an optical instrument that can measure the angle between two distant targets. It is most commonly used to measure celestial bodies.
By measuring the angle between it and the sea (earth) horizon or between celestial bodies, and then checking the latitude of the point where the sun shines directly on that day based on the calendar, the latitude of the observer can be determined.
The sextant is the most important positioning and navigation instrument in the age of navigation. Europeans only really invented it in the 18th century.
Of course, its principle is not complicated, it is very simple. What is really difficult is to make the colorless glass of the sextant and the telescope. Europeans did not make the colorless glass until the 16th century, and the telescope was not made until the 17th century.
was invented.
Now that Liu Jin has made colorless glass and understands the principles and methods of making telescopes, there will naturally be no problems in making a sextant.
Tian Erniu very skillfully placed the sextant in a horizontal position, pressed the clamp, loosened the reading ruler, adjusted the Polaris through the telescope on the sextant to the sea level in the field of view, and then began to continuously adjust the reading ruler below.
position so that the position of Polaris is in the middle of the telescope's field of view.
Then he swayed repeatedly to make sure that Polaris was indeed in the middle of the field of view, then wrote down the degree, then turned over the comparison table designed by Liu Jin, and began to keep calculating on paper with a pen.
"39 degrees 12 minutes north latitude~"
Soon, Tian Erniu calculated a result, and then carefully recalculated it several times. The difference in the obtained data was very small, and he could basically determine his position.
He took out a simple globe, found the location of the Bohai Sea on the globe, opened the map, and recorded today's location in his sailing diary.
"Er Niu, you are still awesome. You can understand such complicated things."
Zhao Houhou has been following Tian Erniu, and he is very envious when he sees Tian Erniu busy.
If students at the Maritime Academy want to be captains, the first thing they need to do is learn to use a sextant and calculate dimensions based on the North Star. This requires a good brain and good mathematical knowledge.
Although Zhao Houhou is known as a monkey, he has never been able to learn it. Tian Erniu was willing to study hard and learned this thing. Together with his performance in other aspects, he became the captain of the Taishan.
"This thing is actually very simple. As long as you study hard, you can learn it quickly. Come, let me teach you. You have already learned how to use this sextant. The most important thing now is mathematical calculations.
There are formulas in it, and we can calculate the dimensions of the ship based on the measured angles."
Tian Erniu smiled, and then began to teach Zhao Houhou step by step.
Life on the ship is actually very boring, because the ship is so big and all the spaces are occupied, and sleeping is also a very painful and difficult thing for the crew.
The sound of water on the sea kept ringing, and from time to time some people got seasick and vomited. In addition, the ship continued to rise and fall with the waves. Most of the more than 100 people on the Taishan had a hard time falling asleep and could only stay in bed.
I kept tossing and turning, and sometimes I just couldn't sleep anymore, so I quickly came to the deck to enjoy the cool night.
The next day, Tian Erniu was awakened by the screams of seagulls. After getting dressed and going outside, he found that there were groups of seagulls surrounding the ship.
These seagulls fly in the sea and need a place to rest. Ships sailing in the sea have masts that can provide them with a resting place, so the presence of seagulls is always indispensable around the ships.
"The Bohai Sea is an inland sea. It is very close to the coast. It is normal to see seagulls."
Tian Erniu's mind recalled what Liu Jin said in class. The seagull cannot be too far away from the land, so if you encounter a seagull, it means that there must be land around, and you are also looking for land.
One method, Tian Erniu firmly remembered this.
"Creak~Creak~"
Just as Tian Erniu was watching the seagulls and thinking, the wooden beams supporting the trawl net made a series of unpleasant sounds. The sound made people immediately get goosebumps and give them a feeling of sore teeth.
"Monkey, ring the bell immediately. It's time to close our trawl net. It seems that the profit should be quite a lot, otherwise we wouldn't make such a sound."
When Tian Erniu heard this, he looked at the supporting beams, which showed a slight arc, and immediately said to Zhao Houhou.