Chapter 652

With the discovery of the Strait, the sea route to ah San seems to have really opened the channel? But many things are not so simple!

Navigation at sea is not a simple thing, especially before complete exploration, any route has great risks. Even after the exploration is completed, it is not 100% safe. No one knows what will happen during navigation.

No matter which dynasty had sailed before, the new Han Dynasty galloped the sea in a few years. Although a large number of sailors were trained, they mostly sailed offshore, and the route was thousands of nautical miles at most. They really didn't go out of the deep sea.

Liu Yan is not familiar with the situation in Malacca. He has the impression that it is a place all over the island.

The large number of islands in a sea area means that the waters there are less simple. Sea reefs are not the biggest obstacle. Where there are islands, the seabed draft is generally not deep. Ships with a draft of ten meters can sail at high tide, but ships with a draft of two or three meters can run aground at low tide.

The sea near the coastline is called by a term, that is, the navy is distinguished by the navigable time. Those who can sail in the medium and far seas are called blue water navy, and those who can only sail not far away are brown water navy. In addition, there are inland Navy and green water navy.

At best, the current fleets of the Han Dynasty, namely the brown water navy, are basically close to the mainland, and the farthest is to Malacca, but they are only wandering in the South 1 sea.

Across the Strait is the A3 ocean, which needs to navigate in the blue water ocean. It is the blue water ocean all the way to the southeast of A3.

In a word, there are really not too many good natural ports in the southeast and Central South of a San, and that sea area belongs to the deep sea area. Unlike the gentle seabed of most continental shelves, it is directly the deep sea when it comes out of the continental shelf.

Although the sea is a sea, the problem is that it is not only different in depth, but also different in sea conditions. A simpler distinction is made. Some sea areas will be relatively calm, and some sea areas are the most common waves, which can roll up to a height of more than five meters.

"The South 1 sea is far more complicated than we thought." Cai you still has a full voice. Who let his authority involve mountains and rivers resources: "there are often storm seasons in the open sea of Jiaozhi south central region. Even our largest ship has been overturned by wind and waves."

At the present level of shipbuilding in the Han Dynasty, ships with a length of 76 meters, a width of 25 meters and a mast height of 12 meters can be built. The ship has a water depth of seven meters and is five meters above the water level. It is divided into five layers, but three of them are below the water level.

The shipbuilding technology of the Han Dynasty inherited from the Zhuxia civilization and belongs to the type of blessing ship, that is, the shuttle shaped bow with a fat stern, which will appear relatively swollen as a whole.

Of course, due to the relationship that Liu Yan can "summon" warships, coupled with the immature shipbuilding technology, shipbuilding in the Han Dynasty is going for civil use, and the most used technology is the technology of the Pre-Qin Dynasty.

In order to live forever, the first emperor built ships on a large scale several times, and there was really the success of the fleet sailing to sea and returning smoothly.

The crafts and vast amounts of knowledge of the Qin Empire were destroyed and plundered by Xiang Yu, a crazy demon who set fire to and robbed them. For example, the assembly line craft was rumored to have been lost by Xiang Yu. The crazy demon who set fire also burned a large number of ancient books, and some documents and craft texts were burned. However, some of the things he plundered were handed down, but they were divided up by the people, It did not fall into the hands of the Han Empire.

The Han state built ships for sea. The materials came from some aristocratic families that were destroyed, and some aristocratic families that were not the object of suppression offered them. Among those materials, there are many shipbuilding materials of the Qin Empire, but more is the building ship technology rising in the Han Empire.

Building boats can play happily in the relatively calm environment of inland rivers. Not to mention the sea, even in the inland lakes, building boats have been blown over. It's really not a good boat, so the Han country gave up.

The Han army recovered Jiaozhi again. Liu Yan opened the people to colonize the Indochina Peninsula in the past. There were too many material exchanges. As a result, the South 1 sea really entered the sea area where ships were passing through.

Liu Yan has a strong interest in the sea. He is happy to see that the sea routes are fully utilized. He really sees that various resources from the Indochina Peninsula are transported back to the mainland, but he does not understand some accidents caused by navigation.

"There are reported overturns and disappearances, 146 within two years." Ji Chang obviously has done his homework: "it's basically lost in the storm season."

The so-called storm season should be a typhoon or hurricane. At present, there is no means to detect the weather of nature. When a typhoon or hurricane will roll over at sea, it can only be found when the hurricane or typhoon is close. Generally, the ship goes to sea without knowing it, but it is too late to avoid when it is found.

"We are summarizing the relevant information." Cai you said solemnly, "when there is a storm every year, you can make a summary."

In fact, typhoons or hurricanes hit the mainland coast dominated by the Central Plains Dynasty every year, which is very rare compared with the Indochina Peninsula.

The Indochina Peninsula is indeed an area frequently swept by typhoons and hurricanes. When exaggerating, it can come more than a dozen times a year. There is almost nothing to do from spring to autumn, waiting for the storm to clean up the mess.

Liu Yan asked, "do you have data on the ships sailing in the South 1 sea?"

Ships need to report for record when leaving the port and register when entering the port. It does not rule out the possibility of someone going to sea and landing privately from a hidden place. However, the official can still master most of the ship's navigation records. Cai you, who manages this aspect, also gives a figure.

"There are more than 2000 ships in the busiest period?" Liu Yan was stunned. Unconsciously, there were so many sea ships in China and Han? He asked, "what kind of ships are they?"

Small boats can't sail long distances on the sea at all. They have to have a certain tonnage. However, it's estimated that no one pays attention to this these days. The interest is enough that some people dare to use small boats for navigation.

"In recent years, the Han Dynasty has only sold more than 800 ships to the people, all of which are large ships with more than 500 materials." Cai you smiled bitterly and then said, "most of the ships engaged in maritime navigation are inland river ships."

One material is 0.325 tons, and five hundred materials are 162.5 tons.

The 162.5 tons used in modern maritime navigation are too small to be small. They are either small yachts or fishing boats fishing offshore. But in the current era, 162.5 tons is a behemoth. Anyway, civil ships of the same tonnage can hardly be seen in inland rivers. There should be inland river flat bottomed ships that are also military ships.

Inland river flat bottomed ships are not suitable for sea navigation at all. At sea, we still have to use sharp bottomed ships with deep water. Otherwise, a little wave can overturn the flat bottomed ships.

Liu Yan was surprised and said, "there are only 146 accidents in two years. It's really rare."

"Every time the families go out on a large scale, they will connect their ships and use them at sea." Cai you is talking about the iron chain. The method is a little stupid, but after the connection, the huge volume will reduce the subversion of the waves: "the speed is not fast, so it will be slower."

Look, we can't underestimate the wisdom of the ancients. They know that flat bottomed ships are very dangerous at sea. Without sharp bottomed ships, they connect flat bottomed ships with each other, increasing the volume floating at sea level and generating greater buoyancy to increase safety.

[at the end of the Southern Song Dynasty, the imperial court that hid at sea to continue its struggle did the same. The mainland was completely occupied and lacked supplies. It was refused to go to the vassal state (the then Yue).] Liu Yan's thought drifted and pulled to the current problem to be solved: "Han should vigorously encourage HNA and should increase the production capacity of each dock."

Ji Chang agreed on his face, but had to talk about the problem: "there are no two out of ten craftsmen under the rampant hooligans. There are a large number of craftsmen in the south, but..."

The shipbuilding industry of the small imperial court in the Eastern Jin Dynasty was quite good. There were as many as 60000 craftsmen serving shipbuilding alone, but the small imperial court collapsed, most of the craftsmen fled, and a considerable part was swallowed by families.

At present, there is no such a clear class division as scholar, agriculture, industry and commerce. The nobility of the scholar class is inevitable. Under it, they all belong to the people, and there is no distinction between high and low.

Workers are divided into officials and individuals. Once they become officials, craftsmen are almost like slaves. Not only do they want to be slaves, but future generations can't escape this fate. As a result, no one wants to become officials' craftsmen.

"If you want to vigorously build..." Cai you clearly put forward: "I'm afraid it's necessary to allow private people to build docks."

"Few people have never restricted people from shipbuilding." Liu Yanzhen didn't have this idea and said, "what to develop is not enough to rely on the government. If a big man wants to cross the world, he needs private participation."

Europa started the great voyage, which was the product of the prevalence of pirate culture. All routes were full of pirates. For a time, there was a culture of advocating pirates, but it attracted ordinary people's interest in the sea. It really didn't rely on the official to make the great voyage.

Of course, Liu Yan does not allow pirates to trouble the country, and even his own maritime ships can not be attacked by pirates, but he is still happy to see if his people go to other countries' routes or coastal areas to be pirates.

"People can build their own docks, but they should standardize management." Liu Yan felt that if this article was to be implemented, the South should be jubilant: "strict records should be kept on what ships were built and how many were launched."

Shortly after returning to the center, LV Yi's eyes lit up and looked at Yu Yi with the same excitement. They said in unison, "how can the technology of making sea ships be provided?"

As I said, there is a difference between the system of inland river ships and marine ships, not only the bottom structure, but also how to lay the keel is a great knowledge.

The requirements for keels of inland ships are not so strict, even multi-stage assembly is within the acceptable range, all because the pressure on ships caused by inland rivers is not large.

The sea is not like an inland river. The waves are testing the keel of a ship all the time. If you don't pay attention to it, you'll wait for the keel to break and the ship will sink to the bottom of the sea in an instant.

In addition to the keel, inland river vessels and marine vessels are also distinguished in other structures, the more obvious is the bottom type. Secondly, the kinetic energy that inland rivers and the sea rely on is also exquisite. Although they all rely on wind, the layout of masts and sails is a great knowledge.

"Naturally, it can't be free." Ji Chang is a big housekeeper. For the current situation of the Han country, he is not necessarily poor. What he lacks is materials: "he can take shares in technology and repay subsequent materials."

Liu Yan originally wanted to engage in patents. Thinking that there was no such environment, he felt that the way proposed by Ji Chang was more reliable.

Over the years, the navigation has not been fruitless. In the past, the mainland was only navigable to the Bohai Sea, the Yellow Sea, the East China Sea and the peninsula. At this stage, seafarers were trained and accumulated experience. Later, the southeast and South were navigable on a large scale.

The South 1 sea is a foot washing basin for the sea, but it is much larger than the trench between the mainland and the peninsula.

To the north of the South 1 sea is the continental shelf, but to the south are numerous and numerous islands. Only according to the data currently available in the Han Dynasty, the number of exploration for small islands and reefs has reached nearly 100, but most of them are islands without fresh water, and large islands are the kind of Luzon.

Han has discovered many islands in the Philippines, including Brunei, Malaysia, Indonesia and other islands.

If the discovery of islands is about land and has various ancillary resources, the discovery of cold current is really a great discovery.

The earth has cold current and warm current flow areas, which is related to the formation of monsoon in maritime navigation. The means of navigation before the formation of mechanical power technology depends on monsoon. Although the monsoon is the same every year, leading to a round trip for a long sea voyage in a year. If you miss the monsoon, you have to wait for the next year, but the discovery of the monsoon is really important.

"Some people found an island full of spices, some people found easily found gold after they went to the island, and some people..." Yu Yiman excitedly mentioned many examples, and finally concluded: "the sea is a treasure house, or an ownerless treasure house."

There are not only land resources such as spices, gold and precious timber, but also rich seafood products in the sea. At present, the Han country is engaged in extensive fishing in the East China Sea, Bohai Sea and Yellow Sea, even killing whales. At present, there is a lack of fresh-keeping means, and most marine products benefit the coast, so it is difficult to keep fresh and transport them inland, Inland to eat seafood is basically all kinds of processed salted fish and fish.

"There is still a Lord." Ji Chang believes that this gathering talked about a lot of exciting things. He not only discussed the feasibility of the military's invasion of ah San, but also felt good about too much good news: "there are savages on various islands, just without fighting."

A burst of "ha ha" laughter was sent out. Ji Chang was not wrong. There were people on the islands everywhere. Those savages basically drank their hair and blood, and some didn't even enter the stone age.