"What's going on?" Youdi Zhiyun's face changed greatly, and he couldn't help but ask loudly.

"Your Excellency, Commander, look!" At this moment, the adjutant screamed in horror from the side.

Arichi Pinnoyun rushed out of the command room in a panic, rushed to the deck, leaned on the railing and looked behind, only to see the cruiser Otowa that had always followed the fleet, and for some reason there was a sudden explosion, and the entire hull had begun to sink slightly. The face of the landed product was like ashes, and I only felt dizzy for a while, and almost plunged into the sea. Now Japan only has this kind of family foundation, and it really can't withstand such consumption, "What happened?" Why does Otoha explode? Why? There was a loud roar in the bottom of the earth's goods.

"Report to Your Excellency Commander, according to the report of the Fuji, the cruiser Otowa should have been torpedoed by a submarine before sinking." At this time, a naval officer ran over and said loudly.

"Submarines? The North Koreans do not have submarines at all, they must be submarines of the Chinese! Bagaya Road, these hateful Chinese people. Blow it up! Find that damn submarine, blow it up, be sure to sink it! Youdi Zhiyun said angrily.

The submarine can be traced back to Leonardo in the 15th-16th centuries? Da vinci. It is said that he conceived of a "ship that could sail underwater", but this ability has always been regarded as "evil", so he did not draw the design. Until the eve of World War I, submarines were still used as "ungentlemanly" weapons, and their captured crews could be punished as pirates.

The first military submarine appeared in the American Revolutionary War. David of Yale University in the United States? David Bushnell built the Turtle, which floods the tank with a guò foot-operated valve, allowing the boat to dive up to 6 meters underwater and stay underwater for about 30 minutes. The boat is equipped with two hand-crank propellers, which allow the boat to achieve a speed of about 3 knots and control the lifting and lowering of the boat. There is a manual pressure water pump in the boat to discharge the water in the water tank and make the boat float. Carry an explosive bag that can be detonated with a timed fuse on the outside of the boat, which can be manipulated and tethered to the bottom of the enemy ship. Only one person is accommodated inside to operate the rudder and propeller.

80s of the 19th century. Submarines are progressing day by day, and countries are gradually realizing their importance. The United States, the United Kingdom, France, Sweden, Italy, Germany and Russia are all keen on R&D. In 1878, the British-American John ? Philips? Holland is committed to this work. In April 1900, the U.S. government purchased its submarine Holland 9 and incorporated it into the U.S. Navy. Since then, the submarine has officially become a kind of naval vessel. In 1898, the Frenchman Maxim? Lauberf pioneered the construction of the "Horned Whale" with a double-hull structure, which stored ballast water between two layers of hull, which had the advantage of greatly increasing buoyancy. This later became a type of Soviet-Russian submarine.

In the last decade of the 19th century, submarines became at least a potential deterrent weapon. However, because the naval powers such as Britain and the United States at that time were still skeptical of submarines. It is always believed that submarines are nothing more than weapons used by weak and small countries for sneak attacks, and for this reason the development of submarines has been hindered. But when in 1898 the French "Gustav? After the submarine Zid torpedoed and sank the British battleship "Macenta", the British finally came to their senses and urged the British government to act quickly to counter the new threat at sea that the French were building submarines at an alarming rate. Similarly, Germany and Russia inadvertently realized that submarines might become a practical weapon and threw themselves into the heat wave of submarine construction.

As a traverser, Ren Chao naturally knows the huge role of submarines in future naval warfare. In the First World War in later generations, Germany, which had a relatively weak navy, dealt a heavy blow to Britain and France with its submarines. Throughout the First World War. Submarines of various countries have sunk more than 5,000 merchant ships, amounting to 14 million tons. Among them, more than 1,300,000 tons of merchant ships were sunk by German submarines. During World War II, the Germans took submarine warfare to the extreme, which made the British and American allies anxious.

Therefore, Ren Supernatural will not neglect the study of submarines. As early as 1896, Ren Chao secretly ordered Qingdao Shipyard to start developing submarines. By 1901, Qingdao Shipyard had successfully developed the Qianlong I. submarine. The displacement is 500 tons, using a diesel-electric motor dual propulsion system, and the surface speed is about 10~15 knots. The underwater speed is 6~8 knots, and the endurance has been significantly improved, reaching 2,000 nautical miles. In terms of armament, it is equipped with a front and rear main gun. Two torpedo tubes, a total of 6 torpedoes. The successful sneak attack on the Japanese cruiser this time was a submarine of this type, which belongs to the submarine No. 006 of the Third Detachment of the North Sea Fleet. At this time, the Imperial Chinese Navy had only 16 submarines of this type in service, of which 10 were equipped with the North Sea Fleet, and the other 6 were equipped with the East China Sea Fleet and the South China Sea Fleet.

At present, all countries have only just attached importance to submarines, and the anti-submarine capabilities of their fleets are quite limited. Moreover, after the submarine 006 was successfully attacked, it immediately dived and escaped, and the Japanese fleet had no choice at all.

Arichi Zhiyun quickly realized this, and immediately ordered the fleet to be on higher alert and quickly sail towards the Sasebo military port. First, the Japanese fleet couldn't find that hateful submarine at all, and second, the submarine of the Chinese people had already arrived, so the fleet of the Chinese people should not be far from here! Thinking of the land here, Zhiyun couldn't help but break out in a cold sweat. Although you have received information before, the main force of the North Sea Fleet of the Chinese Navy is still in Lushun and Qingdao, and you have the courage to pull out the combined fleet to fight a decisive battle with the North Korean fleet, but the North Sea Fleet still has a detachment stationed in the Ryukyus! This fleet was often seen in the waters south of Japan, and sometimes it was very shameless to pretend to be pirates and rob Japanese merchant ships, which was hated by the Japanese. This single detachment alone is not something that the current Japanese Combined Fleet can contend with.

Although in terms of displacement, this detachment is not much different from the Japanese fleet, with a total tonnage of more than 60,000 tons. But in terms of overall quality, the Japanese are slightly inferior. At this time, many of the Japanese fleets were old ships left over from the First Sino-Japanese War, while the Third Fleet of the North Sea Fleet was all new-type warships. Moreover, its flagship Ryukyu is a new type of battleship with a displacement of more than 13,000 tons, and several Japanese battleships tied together may not be the opponent of this giant ship. Thinking of the land here, Zhiyun couldn't help but break out in a cold sweat, it was better to flee to Sasebo Military Port quickly, if you wait until the main fleet of the Huaxia Navy arrives, then the trouble will be even greater. "Inform the ships to leave this dangerous area as much as possible and return to Sasebo Naval Port!" Yun ordered in a deep voice.

"Hay!" (To be continued......)

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