At the moment, he didn't hide his secrets and taught him how to use the sextant. [Read the latest chapter] The use of sextant is more convenient and accurate. Li Huamei has been sailing all year round, and she immediately fell in love with it after trying it out.
"It's really rare to have such a useful thing." When she returned the sextant to Chen Haiyang, she was still a little reluctant to part with it, "Can you sell it to me?"
"In the future." Chen Haiyang said, "We still have difficulties in making it ourselves."
"Is that lens difficult to make?"
"That's right." Chen Haiyang said while instructing the students to use it in sequence, "It's not easy to grind the lens yourself."
Li Huamei sighed: "Oh, you have so many good things, but you just refuse to sell them."
"Pay attention to the spot where the light spot falls, and hold it firmly. That's right!" Chen Haiyang did not answer. Which items can be sold depends on the executive committee.
"I feel it." Li Huamei came closer to Chen Haiyang and said, "You know everything, you just refuse to say it!" The distance between the two was so close that he could feel the woman's breath blowing on his roots, and his skin trembled. The good feelings that I had had have cooled down again. He did not answer, but shouted loudly to the students:
"Start calculating the voyage!"
After hearing the instructions, the students worked in groups of three and one person threw a small wooden board out of the river. One side of the wooden board was covered with lead so that it could stand upright after falling into the water. Another student holds a retractable scroll connected with a string and a wooden board. The student who threw the plank stared at the fallen plank. When the small plank emerged from the vortex at the rear, he immediately shouted:
"start!"
The student holding the scroll began to let go of the thread and rope. The scroll rotated rapidly and the thread was continuously released. At the same time, the student holding the hourglass immediately turned over his hand, and the fine sand began to flow down quickly.
"Stop!" As the sand in the hourglass leaked out, the timekeeper shouted the stop command. The lineman jammed the reel.
"3 knots!" the line operator reported according to the mark on the line, "now sailing .degree., 3 knots."
Chen Haiyang observed whether their actions were in compliance with the standards. He nodded: "Okay, next group!"
Li Huamei looked at them and said, "You must have learned your navigation skills from the British."
"Why?"
"This method is used only by British sailors."
The boat's speed is 3 knots, which is normal in sailing sailing. Although it is a little slow, it is safe. The Chinese navigation guides and charts in their hands were all drawn based on data from the 20th century, and the situation along the coast of Hainan in this time and space was still blank.
The sun gradually set in the west, the wind began to increase, the waves also became larger, and the measured sailing had reached 5 knots. Lin Chuanqing worriedly grabbed the walkie-talkie hanging around his neck and asked:
"Look, look, what's the sea situation like?"
"Everything is normal." Yellow Claw, who was in charge of lookout at the top of the mast, returned. Looking from the top of the mast, the viewing angle is extremely wide, and of course the swing is also extremely violent. From the top of the mast, you can see many ships nearby, most of them are fishing boats, and occasionally there are a few large ships sailing with their sails fully spread. It must seem peaceful.
"How's it going? Can it be tolerated up there?"
"It's okay, the scenery up there is nice, the air is good, haha." Huang Zhao was particularly adaptable.
"What's the cloud situation like?"
"Altocumulus clouds, moving from east to west."
This means that the weather is normal and there will be no wind or rain.
"Ruan Xiaowu, climb up and follow Instructor Huang to look out!"
The child named Ruan Xiaowu looked a little scared, but he still stepped out of the queue, grabbed the rope net on the mast, and climbed up.
The first day passed smoothly. Under the breeze, the fleet traveled about 40 nautical miles at 3 knots per hour. Since it was sailing along the coast, there was a risk of running aground when sailing at night. At nearly 18 o'clock, Lin Chuanqing We found a remote harbor on the shore to spend the night. The local longitude and latitude were measured: 19°44'o”n, 1o9°9'o”e. After checking the map, I found that this is where Yangpu Port in Danzhou is located.
Yangpu is one of the largest deep-water ports in western Hainan. In this time and space, it appears empty and desolate. The harbor is very large, with some sandbars crisscrossing it. From a distance, you can see several sailboats moored on the shore and a small fishing village.
Put down a rowing boat and go down to detect the water depth and determine the channel and berthing position. The Zhenhai put down its propeller engine and towed the Hangzhou behind it to sail cautiously and low towards the harbor.
Li Huamei stood on the poop and looked at the churning water below: So this is the reason why they don't install more cannons. It seems that not only iron ships can sail without sails and oars, but also wooden ships. That's something they put on board to make it possible. And this thing should be in a cabin under his feet...
Wang Luobin decided to stay for a day or two in Yangpu, which is the most valuable deep-water port in the west of Hainan Island. It is necessary to collect more information about the ports that the future travel regime will focus on opening. Immediately order the commandos to go ashore, control the situation, and replenish some food and water.
Looking through the telescope, the coast of Yangpu was very deserted, but there was a fishing village on the shore. The special reconnaissance team led the navy team to land in a rowing boat and immediately broke into the village. There are only a dozen households in the entire village, and more than half of them have already fled. As soon as they saw strange ships entering the harbor, all the local fishermen ran away, leaving only a few old and weak people. When they saw them coming, they all bowed. of. Fortunately, they were still speaking in Lingao dialect. Only the sailors recruited locally realized that they were begging not to burn down the houses and rob the boats, but to just take the fish if they wanted.
Xiong Buyou from the Ministry of Foreign Affairs gave them some kind words to comfort them, saying that he was just going ashore to replenish some water and food, and that everything he took would be paid according to the price. He also gave some sewing needles, sugar and other gifts to comfort the old men. Rowing boat 6 continued to transport people ashore here: after a hard day's work, the travelers felt a little relieved, their seasickness had passed, and their appetites had recovered. They all made up their mind to go ashore for a walk. Some people also proposed to go ashore to hunt and eat meat. Then check to see if there are fish, vegetables, eggs, etc. available for purchase in the village. Wang Luobin thought that since we would be delayed in Yangpu for a day or two anyway, he might as well just let everyone go ashore.
After the marine team landed ashore, they quickly took control of the entire village, leaving those who had escaped alone. A temporary residence was quickly built with tents and barbed wire next to the fishing village. At the same time, an observation post was posted on the nearby high ground to settle down temporarily.
Amateur hunters conducted a discouraging hunt ashore. The local area can be said to have three things: a lot of wasteland, a lot of rocks, and a lot of cacti. Under these three things, you basically can't even hunt a hare, and there are naturally no wild vegetables. After wandering around for a long time, I basically came back empty-handed.
That night, Chen Haiyang had to continue discussing astronomical measurement techniques with Li Huamei in the middle of the night. She demonstrated how to use the quadrant on the spot, and the students were surprised by the huge gap between the data obtained by the quadrant and the sextant. Although the error rate is less than 5%, less than 0.1 degrees, the converted length is 9 kilometers. On the vast sea, this error is enough to cause many fatal mistakes. It's no wonder that early navigators preferred to sail along the coast - after all, coastal landmarks are more accurately measured.
The next day, the exploration team surveyed part of the harbor. The navy measured the water depth and selected a number of berths. A survey of the surrounding natural environment concluded that the local area is very barren, with basically no large natural rivers, and it is difficult to draw water. There is little arable land and even fewer trees.
"If the problem of industrial water use can be solved, it will be a good place for industrial development, which will not occupy agricultural land at all and will not damage the environment." Wang Luobin lamented after an on-site investigation, "The environment is already bad enough."
Early on the third day, the fleet continued to set off. After several days of stop-and-go inspection activities, finally at noon on the fifth day, the ship arrived at the mouth of the Changhua River. Here, the Changhua River divides into the north and south rivers and flows into the sea. The mouth of the south river is called Sanjiagang, and the north river flows south around the county seat and enters the sea called Wuni Port, which is closer to the county seat. It is the main port of Changhua County.
But from Lin Chuanqing's telescope, it was obvious that Wuni Port in Beijiang was not suitable for parking. There was a large area of siltation. Except for some small fishing boats, there was no sign of a ship docked.
Li Huamei is very familiar with the hydrological conditions here: "Sanjia Port, any ship with 200 materials in Wuni Port will be stranded."
So the fleet stopped at Sanjia Port in Nanjiang River. When the ship sailed into the harbor, it saw several villages and some ruins on the shore. It looks like it used to be a military garrison but is now deserted.
Spring is the dry season, and the flow of the Changhua River is very small. The rivers are dry and dry, revealing the snow-white fine sand and withered aquatic plants on the river bed. The Changhua River is a plain on the north bank. Most of the vegetation along the river has been severely destroyed, forming a dry savannah environment similar to the African grasslands. There are sand dunes in many places, which extend far into the interior.
At the end of the plain is a group of continuous hills with dense vegetation, with a visual height of about 200 to 400 meters. The south bank of the Changhua River is also a plain, with faint paddy fields and a city - it should be the Changhua County seat of the Ming Dynasty.
"Where is the quartz sand mine in Haiwei Town that Mr. Wen mentioned?" Bai Guoshi asked. The quartz sand mine in Haiwei Town is the key target of this exploration. The local quartz sand has a silica content of 99.8% in raw ore and 0.1% iron. It has few impurities and uniform particle size. It is rare in the country and has huge reserves.
"Isn't that right?" Wang Luobin pointed to the snow-white sand on the beach in the distance.
"Where's Haiwei Town? There should be a town——"
"It's 1629 now."
Wang Luobin ordered the boat to be put down, and several members of the exploration team drove the sampan towards the beach. Soon after, they brought back a few rattan baskets of sand from the beach. Wang Luobin pinched some and looked at it carefully in his hand. Under the sun The sand in the center of the palm is as white as snow—what a good thing! Of course he knows the goods. It would be a waste to use such good quartz sand to make wine bottles and mirrors. It can also be used to make raw materials such as circuit fuses and displays. ! ~!
