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Fang Renxu is the child of a fisherman's family in a small fishing village near the sea in southern Guangdong. Since childhood, he has been gifted and intelligent, and he has excelled in learning. Since childhood, he has liked to go to the nearby Hong Kong Island to see the navy's big warships, and after graduating from high school, he applied for the Naval Academy with excellent grades. After being admitted, he was also an honor student in the college.

Originally, according to the normal trajectory, Fang Renxu would follow the path taken by countless predecessors after graduation. However, he unexpectedly chose to go to the Submarine Academy for further study after getting the Golden Spike Saber. Eventually became a submarine captain.

The Ming Navy is the world's navy, with a large number of colonies and interests in various parts of the world that need to be maintained by the navy's warships. Submarines, which are more inclined to sneak attack weapons, are not valued in the Ming Navy, and are even vaguely excluded. The Ming Navy, which has strong strength and a glorious history, advocates large-scale fleet decisive battles. As a result, the situation of the submarine forces was not ideal.

It was not until the Battle of Northern Italy, when the Yancheng was sunk by a Sardinian submarine, that this despised weapon gradually gained attention. But the person who really promoted the development of the submarine unit was Zhang Cheng, an army officer.

Maybe others don't understand, but how can Zhang Cheng, who came to this era from modern time and space, not understand the power of the submarine force? Who doesn't know the name of the German wolf pack during World War II? Although it was not taken too seriously, the top brass of the Navy still gave Zhang Cheng face and allocated a sum of money to order a batch of new submarines from Zhang Cheng for the submarine force to be refitted. This made the submarine unit of the Ming Navy, which had never had a good time, very grateful to Zhang Cheng. Moreover, Zhang Cheng even provided submarines for the Daming submarine force at a near-cost price, which is even more unbelievable.

After communicating with the navy, Marshal Li Han readily agreed to transfer the submarine force to the command of the Western Pacific Theater. This is due to the fact that submarine forces are not taken seriously. However, when the submarine unit shows its might, the Navy will inevitably pay attention to it.

Zhang Cheng, who was far away in the front command headquarters in Seoul, remembered the deeds of the Scapa Bay hero. After learning the general movements of the Japanese Navy through intelligence, Zhang Cheng sent a telegram to the submarine force, ordering them to send an excellent submarine to attack the Japanese fleet at night!

The encounter with the Yancheng has demonstrated the submarine's ability to attack a warship stationed there. Japan, which was deeply influenced by the Ming Dynasty in all aspects, also did not pay much attention to submarines and was not strict about underwater protection, which gave the navy an opportunity. The main purpose of Zhang Cheng ordering this raid was to improve the morale and image of the navy. In the aftermath of the war, the navy suffered a series of unfavorable situations, which left them with criticism from all sides at home. This is also a blow to the morale of the Navy.

You can't go to war without morale. Zhang Cheng is determined to give the arrogant Japanese a ruthless blow, and what kind of price they need to pay to make their goal the enemy of the Ming Dynasty! Succeeded, everything is good. Failure, nothing more than the loss of a submarine. For those in power, many times, life is really just a number.

As the best submarine commander, this extremely risky task fell to Captain Fang Renxu.

Captain Fang Renxu's career was not smooth. Several of his classmates at the same time had already received the rank of major, and as the winner of the Golden Harvest Sabre, Fang Renxu was only a small captain. There are too many captains in the Ming Navy. However, Fang Renxu didn't care too much about this, he was a real soldier who longed for war in his heart. After the task of raiding the Japanese military port was issued, Captain Fang Renxu took the initiative to ask for it to be borne by himself.

......

At about 8 o'clock in the evening of July 17, 1939, the Japanese attacking near Seoul on the Korean Peninsula were fighting fiercely with the defending Ming army. In the distant Tokyo Bay, a periscope rises quietly on the dark and rainy sea.

This submarine, named Tiger Shark, is an underwater killer commanded by Captain Fang Renxu who came to raid the Yokosuka base of the Japanese Navy.

Zhang Cheng designed two types of submarines for the Navy. One is a small inshore submarine, which is mainly used for training. The other is a large ocean-going submarine, which is the main force of operations.

When Zhang Cheng designed this ocean-going submarine, he combined the current mature technology and chose the blueprint of the famous IXC type. Of course, some technologies are not yet attainable, or can be achieved but are not yet mature, and are not suitable for large-scale production. So the actual capabilities are slightly less than the blueprints, but they are already the best submarines of this era.

This ocean-going submarine is 73 meters long and has a full load displacement of 1,080 tons at the surface and 1,190 tons at full load underwater. The maximum speed on the surface is more than 17 knots, and the maximum cruising range is close to 9,000 nautical miles. The maximum speed under water is more than 7 knots.

Thanks to the new battery, it can be used at a speed of more than 80 knots underwater. The design depth can only reach 180 meters, mainly because the structural materials cannot meet a higher standard. The boat is equipped with 4 torpedo tubes in the bow and 2 in the stern with 26 mines. In addition, the boat was armed with one 105-mm gun and one four-pack 37-mm anti-aircraft gun. There are 5 officers, 16 non-commissioned officers, and 28 sailors.

Compared with the various types of submarines equipped by various countries, this submarine designed by Zhang Cheng has an advanced shape, which reduces underwater resistance and increases speed. Moreover, the hull is covered with a rubber layer, reducing the possibility of detection. The larger interior space allows for more batteries, extending the underwater diving time. With a snorkel, the submarine can be charged without surfacing the surface, reducing the chance of being detected by the enemy. The mechanical torpedo loading device is adopted, and the reloading speed of the torpedo is increased.

When receiving the new submarine, Captain Fang Renxu excitedly shouted, "This is what I want!" ”

Now, Captain Fang Renxu and his crew have crossed the ocean to Tokyo Bay in the submarine Tiger Shark, where they will carry out a surprise attack on Yokosuka Naval Base. Let the Japanese see the anger of the Ming Navy.

Located in Yokosuka Port on the east coast of Tokyo Bay, Honshu Island, Japan, Yokosuka Naval Base has open waters, with a water area of more than 30 square kilometers and an average water depth of more than 10 meters, making it one of Japan's leading natural harbors. The entire port of Yokosuka is composed of Yokosuka, Nagaura, Uraga and other harbors, with a water area of about 60 square kilometers, a total length of about 19 kilometers, a 4-kilometer-long breakwater, and the ability to berth hundreds of ships. The harbor is surrounded by low hills, and the terrain is dangerous and hidden. There is only one channel in and out of the port in the true sense of the word.

Thanks to the fact that the Japanese were vassal states of the Ming Dynasty for hundreds of years, the topography of Japan had few secrets for the Ming Dynasty. This was especially true after Zhang Cheng approved a large amount of activity funds for Wang Yan to collect detailed intelligence on all aspects of Japan.

Captain Fang Renxu knew all the hydrographic information in Yokosuka Harbor, the Japanese naval garrison, and even the exact location of minefields and shipping lanes. There are many, many Japanese people who are willing to do things for the Ming Dynasty.

Not all Japanese people think they can defeat the Ming Dynasty, even with so many powerful helpers. The hundreds of years of power of the Ming Dynasty cannot be changed by a simple war.

Many Japanese with two hearts are secretly doing things for the Ming Dynasty, and even the Japanese military and government. The top brass of the government are also cautious. Don't look at it now, it seems to be very beautiful, that's because the main energy of the Ming Dynasty is contained all over the world. Once the Ming Dynasty regains its strength, Japan will be dead.

Therefore, the Ming people who work, live and do business in Japan are basically just under residential surveillance. The Japanese dared to wantonly abuse the Koreans in Korea, but they absolutely did not dare to attack the people of the Ming Dynasty. The minds of the Japanese top brass are fairly sober.

Sheltered by the darkness of the night and the increasing rain. The Tiger Shark quietly passed through the inner waters of Tokyo Bay, which had become rarely passed by ships at night due to the war, and approached the port of Yokosuka. The planned time of the attack was between 2 p.m. and 4 a.m., as the currents were at their most steady. However, Captain Fang Renxu has the right to be arbitrary in battle.

"Now it's an in-ship broadcast. Attention everyone, I'm Captain Fang Renxu. "The Tiger Shark, which had been nocturnal since it left the port of Qingdao, finally informed his crew of the mission after arriving in Yokosuka Harbor.

"Brave Navy soldiers, I am here to announce to you that we are about to enter the Yokosuka base to attack the Japanese Navy!" Captain Fang Renxu's words shocked the crew. Infiltrating enemy harbors and attacking warships in wartime sounds like death. However, as a soldier, no matter what kind of mission you face on the battlefield, you will not refuse. The crew in the cabins listened to the radio in silence.

"Everyone knows that the Japanese attacked the home fleet without declaring war, causing a large number of casualties among officers and men. (The Ming Dynasty valued soldiers more than warships.) Because the Ming Dynasty is rich in the world, and the industrial strength is extremely strong, the lost warships can be replenished quickly. And the Japanese are the opposite. Because the lack of resources can only focus on warships and not people. The despicable Japanese attacked us, then we have to fight back against them too! A flash of anger flashed in Captain Fang Renxu's eyes, several of his classmates had been martyred when the home fleet was attacked. Before going to sea, he also made a special sea sacrifice to his classmates.

"It's a dangerous mission." Captain Fang Renxu's voice lowered, with a touch of deep meaning, but then turned to passion, "But we are the fearless Ming Navy!" We will overcome any danger and use our torpedoes to avenge the death of our comrades! ”

"Revenge!" Dozens of crew members shouted loudly, and morale quickly rose. When a soldier goes to the battlefield, he has already put life and death on the line. Although the mission is dangerous, once successful, the results are also extremely brilliant. The brave soldiers mustered up the courage to sail their submarines to the battlefield.

"Now, let's go!" (To be continued.) )