Without hiding anything, I taught him how to use the sextant. The use of the sextant is more convenient and accurate. Li Huamei has been sailing all year round, and she couldn't put it down immediately after trying it out.
"Such a useful thing is really rare." 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 where the light spot falls, and hold it firmly. By the way!" Chen Haiyang did not answer. Which items can be sold depends on the executive committee.
"I feel." Li Huamei came closer to Chen Haiyang and said, "You know everything, but you just won't tell me!" The distance between the two was so close that he could feel the woman's breath blowing on the roots of her hair, and his skin trembled. It was originally a little bit...
His good impression cooled down again. He did not answer, but shouted loudly to the students:
"Start measuring the speed!"
After hearing the instructions, the students formed a group 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. The other student held a retractable scroll.
Use strings to connect the wooden boards together. The student who threw the wooden board stared at the fallen board. When the small wooden board emerged from the vortex at the tail, he immediately shouted:
"start!"
The student holding the scroll began to let go of the string. The scroll rotated rapidly and the string 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 operator blocked the reel.
"3 knots!" the line operator reported based on the mark on the line, "Current sailing speed, 3 knots."
Chen Haiyang observed whether their actions were in compliance with the regulations. 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 speed is 3 knots, which is a normal speed in sailing. Although it is a little slow, it is safe. The Chinese navigation guide and charts in their hands are based on the data of the 20th century. The situation along the coast of Hainan in this time and space is still the same.
Blank.
The sun gradually set in the west, the wind began to increase, and the waves became larger. The measured speed had reached 5 knots. Lin Chuanqing worriedly grabbed the walkie-talkie hanging around his neck and asked:
"Lookout, lookout, what's the situation like on the sea surface?"
"Everything is normal." Huang Claw, who was in charge of lookout at the top of the mast, returned. Looking from the top of the mast, the viewing angle was unusually wide, and of course the swing was particularly violent. From the top of the mast, you could see many ships nearby, most of them fishing boats.
, and occasionally there were a few large ships sailing with their sails fully spread. It seemed to be 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.
"How are the clouds?"
"Altocumulus clouds are moving from east to west."
This means that the weather is normal and there will be no wind or rain.
"Ruan Xiaowu, you 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 a speed of 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
I found a remote harbor to spend the night on the shore. I calculated the local longitude and latitude: 19°44'0"n, 109°9'0"e. I checked the map and found that this is where Yangpu Port in Danzhou is located.
.
Yangpu is one of the largest deep-water ports in western Hainan. It looks empty and desolate in this time and space. 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.
After putting down a rowing boat to detect the water depth and confirming the channel and berthing position, the Zhenhai put down the propeller and towed the Hangzhou behind it to the port cautiously and at a low speed.
Li Huamei stood on the poop and looked at the churning water below: It turns out that this is the reason why they don’t install many cannons. It seems that not only iron ships can sail without sails and oars, but also wooden ships. This is why they installed so many cannons on them.
You can only do it if you need something. And this thing should be in a cabin under your feet...
Wang Luobin decided to stay in Yangpu for a day or two. Yangpu is the most valuable deep-water port in the west of Hainan Island. It is a port that the future crossing regime will focus on developing. It is necessary to collect more information about this place. He immediately ordered the commando team to go ashore.
, control the form, and add some food and water by the way.
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. The entire village only had more than ten households, and they had already fled.
More than half of them - as soon as they saw strange ships entering the port, all the local fishermen ran away, leaving only a few old and weak people. When they saw them coming, they bowed one by one. Fortunately, they still spoke Lingao dialect.
, it was only through the sailors recruited locally that they realized that they were begging not to burn down the houses and rob the boats, but to just take the fish if they wanted it.
Xiong Buyou from the Ministry of Foreign Affairs gave them some kind words to comfort them, saying that he was only going ashore to replenish some water and food, and that everything he brought would be paid according to the price. He also gave some sewing needles, sugar and other gifts to appease the elderly people.
Okay. People are being brought ashore here in rowing boats one after another: After a hard day's work, the travelers have finally relaxed a little. Their seasickness has passed and their appetite has recovered. They all made up their mind to go ashore for a walk.
Someone suggested that they should go ashore to hunt and eat meat. Then they would see if there were any 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 navy team landed ashore, they quickly took control of the entire village and ignored those who had escaped. They quickly built temporary residences with tents and barbed wire next to the fishing village, and at the same time posted observation posts on nearby highlands, which was considered temporary
settle down.
Amateur hunters conducted a frustrating hunting operation on the shore. The local area can be called three things: a lot of wasteland, a lot of rocks, and a lot of cacti. Under these three things, basically not even a hare can be hunted, and wild vegetables are naturally
No. After wandering around for a long time, I basically came back empty-handed.
That night, Chen Haiyang had to continue to discuss astronomical measurement techniques with Li Huamei in the middle of the night. She demonstrated how to use the quadrant on the spot. The students were surprised by the huge gap between the data obtained by the quadrant and the sextant. Although the error rate
Less than 5%, less than 0.1 degrees, but converted into a length of 9 kilometers. On the vast sea, this error is enough to cause many fatal mistakes. No wonder early navigators preferred to sail along the coast - after all, the landmarks of the coast
Measurements are more accurate.
The next day, the exploration team surveyed part of the harbor. The navy measured the water depth and selected a number of berths. The investigation of the surrounding natural environment concluded that the local area is very barren, with basically no large natural rivers, and the draft is relatively small.
Difficulty. There is little cultivated land and fewer trees.
"If we can solve the problem of industrial water use, it will be a good place for industrial development. It 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."
On the morning of 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 enters the sea.
The mouth of the Nanjiang River is called Sanjiagang, and the Beijiang 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 in 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, and except for some small fishing boats, there was no sign of a ship docking.
Li Huamei is very familiar with the hydrological conditions here: "Stay close to Sanjia Port. Ships worth 200 yuan 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 looked like it used to be a military garrison but is now abandoned.
Spring is the dry season, and the flow of the Changhua River is very small. The rivers are dry and dry, exposing the snow-white fine sand and withered aquatic plants on the river bed. The Changhua River is a plain on the north bank, and most of the vegetation along the river has been destroyed.
It is very powerful, forming a dry savannah environment similar to the African grassland. There are sand dunes in many places, which go far into the interior.
At the end of the plain is a group of continuous hills, with dense vegetation and 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 Changhua of the Ming Dynasty.
The county seat.
"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 ore sand has a silica content of 99.8% in raw ore and an iron content of 0.1%.
, less impurities, uniform particle size, rare in the country, and 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 examined it carefully in his hand.
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 circuit fuses, display screens and other raw materials.