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……

"Director Su, the navigator is ready."

The ground receiving end of the sextant system was installed on the back of the jeep, and Tang Hua deployed the 2.4-meter antenna vertically.

"These trees won't affect our satellite communication, right?" Su Yu looked up, and saw that the jeep was parked on the tree-lined road in the villa area, with dense trees overhead.

Tang Hua: "No, trees are not metal objects, and electromagnetic waves will directly penetrate wood. In fact, even if there is a small-sized metal object blocking it, it can still diffract. Hey, the time for the navigation receiving window is up, let's set the first one first location point."

Lin Sanhu, who was in the back row with Tang Hua, took out the map of the Beidaihe area and marked the version with latitude and longitude. Lin Shuai pointed to a place on the map, "We are here."

The ground end has been turned on, and the first signal has been received at this moment.

The sextant system sends electromagnetic waves every 2 minutes, and the ground terminal generally needs to receive electromagnetic waves three times to determine its latitude and longitude with relative certainty.

2 minutes passed, and the second electromagnetic wave was received.The ground end has displayed a range of latitude and longitude numbers.

After another 2 minutes, the third electromagnetic wave was received.

"The signal from the satellite navigation system shows that we are here," Tang Hua started to mark a point on the map according to the latitude and longitude given by the ground terminal.Su Yu also poked his head back from the front driving seat to see if the markings were accurate.

Lin Sanhu: "Oh, we were in front of Mr. Su's small building, but we ended up at Li Fuchun's house."

Tang Hua measured the distance between the two points, "The positioning error this time is 85 meters. Let me see, it seems that there is still some time. Let's receive electromagnetic waves again."

……

"Dad?" A teenage boy walked to the side of the jeep, "Uncle Tang, Uncle Su."

"Little Tiger, let's go as we go. We are doing business. Huh? Where did you get the guitar? What are you doing with it?" Lin Shuai waved to his baby to signal to leave quickly.

"This is from Uncle Tang."

Tang Hua: "Shuai Lin, Xiao Lin seems to have a talent for music. If you practice hard, you will become a musician in the future."

Lin Sanhu sat back to his seat and stopped talking, with three black lines on his head.

"Tang Hua? Commander Su? Three tigers?" The commander-in-chief walked quickly from a distance, "Why didn't you tell me this thing was tested."

Su Yu: "Boss Zhu came just in time, and there is still a seat in the car. We will drive for 10 minutes soon, and we will go to the next point for testing."

……

"...The principle of satellite navigation is like this," Tang Hua briefly introduced the sextant navigation satellite in the car, "Now we can use No. 1 satellite, and No. 2 satellite has been launched into the sky and is still being debugged, so only Satellite positioning can be used for these ten minutes, and at other times, the satellite is not above our heads and wandering around in other places on the earth."

Commander-in-Chief: "I remember, you introduced the satellite navigation to us before."

Tang Hua: "Several of us did a positioning here just now, and the effect is not bad. The error from the actual position is 80 meters. Next, we plan to drive for two or three kilometers, and then use the satellite to do a positioning again at the next point. "

The four of them drove along the boulevard for a while, from the villa area to the recuperation area for personnel of the Central Government, and then to the sanatorium for national model workers. It seemed that they had been driving for 10 minutes, and they found a place to park.

"The coordinates of this place are..." Before Tang Hua opened the map, Lin Sanhu pointed to a place on the map, "We are here."

Another few minutes of positioning.Before the sextant-1 satellite flew away and disappeared, the four completed the second satellite positioning in a static state, and this time the error was 35 meters.

"The result this time is good," Tang Hua said, "Look, the accuracy of satellite navigation can actually meet the combat requirements, right?"

Lin Sanhu: "This thing is very important on warships and when maneuvering outside lines."

Su Yu: "Our troops can know their position anytime and anywhere, which is a great advantage in combat."

Tang Hua: "Su Shuai, Lin Shuai, if the navigation and positioning system equipped in our troops is directly connected to the radio transmitter, when they obtain their position from the satellite, the transmitter will automatically send the current latitude and longitude coordinates of the troops Send it to the general headquarters, and the general headquarters will automatically mark the latitude and longitude coordinates on the map, what will happen then?"

Chapter 228, Crossing the Bohai Sea

In 1959, in addition to vacations and economic work conferences, Beidaihe also held an enlarged meeting of the Political Bureau of the Central Committee and the Eighth Plenary Session of the Eighth Central Committee.Therefore, the economic work conference was not held in the middle of the holiday, but on July 8.

These two will have nothing to do with Tang Hua.

Moreover, it is better to have a meeting in Beidaihe than to go to Lushan.

At the Economic Work Conference, the Central Committee, the State Council, and the State Planning Commission summarized the economic work in the first half of the year, and proposed that the main points of future work are "scientific planning, overall coordination, and promotion of rapid and healthy development of industry and agriculture."

The 1959 Economic Work Conference also discussed the issues of Tibet's counter-insurgency and the conflict with India.

From a military point of view, counterinsurgency in Tibet is a partial military operation, and the conflict with India is still only a conflict. Even if it deteriorates to the point where it cannot be fought, it is still a local military operation.However, the State Planning Commission and various ministries and commissions of the State Council still have to do a lot of work to cooperate with the military and political work in the southwest region.

"After reaching an agreement with Myanmar to use the airspace in emergencies, our airport in Yunnan is much more useful than the airport in Chengdu," Mr. Peng said. In the sky over East India and southern Tibet, even if it is the airport in Kunming, the Il-28 can cover the war zone if it takes off from here. But there is no railway in Kunming.”

Mr. Peng said that there is no railway in Kunming, which means that there is no railway connecting Kunming with other provincial capitals.In fact, there is a railway in Kunming, the Yunnan-Vietnam Line, built by French colonists in the early 20th century, connecting Kunming to Hanoi.

Obviously, this railway cannot be used to transport supplies to Yunnan.At the airports in Kunming, Baoshan, and Lijiang, aircraft spare parts and fuel are all transported by road or air. Not only is the freight extremely expensive, but it is also difficult to support large fleets of high-density aerial operations.

Ji Daiyuan: "The Chengdu-Kunming Railway and the Guizhou-Kunming Railway were both started last year. As you know, Mr. Peng, these two railways are extremely difficult projects. Western railway experts before liberation said that it was impossible to build railways here. A few years ago, Soviet experts looked at the terrain and said that this is a "railway restricted area". In March this year, because of conflicts in southern Tibet, we increased the input of manpower and material resources on the Chengdu-Kunming Railway, but it was impossible to complete the project in a short time. .”

Mr. Peng: "Your original plan was to open to traffic in 1963. After increasing investment, when will the Chengdu-Kunming Railway be open to traffic?"

Ji Daiyuan: "1962."

President Peng: ...

……

Liaoning, Calabash Mountain.

Gu Maoxiang and Yun Liang walked around the No. 34 boat to do routine inspections before sailing.

Although in the past three days, the two of them took the shipyard workers to check the boat No. 34 up and down, and found out and corrected any minor problems and hidden dangers, but the task of this voyage is so important that it cannot be sloppy.

Boat No. 34 is only a little bigger than boat No. 33. According to the standard of a ship, it is an ultra-small speedboat; according to the standard of a vehicle, its length is about the same as that of a large bus.For example, boat No. 34 is now parked in the parking lot of the base.

There is a rubber airbag around the No. 34 boat. Now the airbag is not inflated, and it is softly drooping, and the lower edge is dragged on the ground, like the apron of No. 34 boat.The main body of the boat is in the shape of a rounded rectangle, with a cockpit in the middle. Gu Maoxiang and Yun Liang will sit in this cabin to drive the hovercraft later.Above the rear and upper part of the cockpit is the air intake of the uplift engine, and there are two propellers with ducts and protective nets behind the hull.

Tang Hua dug out the brain hole of the hovercraft proposed by Yun Liang. First, he asked the Sixth Machinery Bureau to cooperate with Harbin Military Industry to set up a factory in Dalian, and later the Fifth Machinery Bureau also stepped in to help.The Shipbuilding Industry Bureau went out of the shipyard, and the Aviation Industry Bureau processed the frame structure of the hovercraft in addition to the engine. This aluminum alloy-steel combined frame structure is much lighter than the all-steel structure.

"Director Gu, I'm still a little uneasy," Yun Liang said, "Actually, we should go out on boat No. 33, which is reliable. Boat No. 33 has been sailing for more than a year, and we are very familiar with its ups and downs. The No. 34 boat has only been used for three months."

"Three months is fine..." Although Gu Maoxiang was not very at ease in his heart, he still summoned up his confidence and said, "Didn't the test of No. 34 boat go well in the past three months? There were some minor problems in the early stage. Adjustment It has been modified, and now the small problems are basically invisible. The 100-kilometer long voyage, No. 34 boat is also a one-time trip.”

"But from here to Beidaihe, it's not 100 kilometers, it's 150 kilometers."

Gu Maoxiang: "Aren't 100 kilometers and 150 kilometers the same? 100 kilometers can be passed, but there is no reason why 150 kilometers can't be passed. It's just an extra 50 kilometers of fuel. Besides, we didn't have a trouble-free test this time, and it broke down halfway. Yes, there is a way to remedy it. There is an aid ship in the middle of the Bohai Sea, which can be repaired, replaced parts, and refueled. After repairing, continue to drive. Remember, as long as the chain is not lost in front of the chairman, it will not be a problem. "

Yun Liang: ...

Gu Maoxiang: "I'm the director of the Naval Department. I didn't squat in the shipyard every day this year. You are the chief designer of the No. 34 boat. You have to have confidence in what you design. Minister Tang said that the hovercraft, To be number one in the world is not to run to the finish line, but to continue to work hard. Do you remember where the goal line Minister Tang said?"

Yun Liang's forehead was sweating: "I remember, I know."

"Then, let's go!" Gu Maoxiang shouted boldly, and climbed on the hovercraft first.However, when climbing the gangway, it was still exposed, and my legs shook violently. I tried to step on the ladder several times before I stepped on the ladder.