Transmigrated as the Crown Prince

Although the advanced submarines of later generations can "break ice and float", these submarines have been specially designed and the strength of the hull has been strengthened. For example, the Soviet nuclear submarine is designed as a double-layer shell, using expensive titanium alloy to make the submarine shell, and the high shell conning tower and the upper half of the submarine shell are designed to imitate the material structure of a whale's back.

Even so, these nuclear submarines cannot break through the ice and surface at any time and must go through detailed planning. There are two main types of nuclear submarine icebreaking: Option 1 and Option 2. Option 1 is to use big data analysis, combined with your own country’s satellite and hydrological observation data in the Arctic, to select melting areas or polynyon lakes with frequent warm current activity nearby. The ice in such places is usually very thin, or even icy. If you are lucky and encounter these places, the water mixture will be fine, and the nuclear submarine will just float up. It is almost the same as other sea areas, and there is no such thing as forcibly breaking the ice.

If you are unlucky, you can only turn on the violent ice-breaking mode. The first thing to do is to use sonar to detect the thickness of the ice layer, and choose an area where the ice layer is thinner and the bottom of the ice layer is flatter to break the ice (there is a cone-shaped ice at the bottom that pierces the shell in minutes). If the ice layer is less than one meter thick, the submarine Usually, the impact mode is selected, that is, sprinting deeper under the ice layer, using acceleration kinetic energy to directly break away from the ice layer.

If the thickness of the ice layer is more than one meter, the extrusion mode can only be used. The submarine first slowly attaches the enclosure to the ice layer, and then drains the ballast water out bit by bit, gradually increasing the buoyancy, and the enclosure shell acts on the ice layer. The force on the ice also slowly increases until the ice layer is squeezed and cracks appear, and then the ice is quickly drained, rapidly increasing the buoyancy, and finally using the surrounding shell to launch the final blow to complete the ice-breaking process.

But what they are facing now is a floating iceberg. The tragedy of the Titanic occurred less than 30 years ago. No ship dares to confront the iceberg head-on, not even a nuclear submarine. Moreover, they have all received professional training and know what is at the core of their submarine's power system. It is simply a Pandora's box. A slight carelessness will cause terrible disasters, so they can only stay away.

News of the nuclear submarine's successful crossing of the Arctic reached the Berlin Palace.

"The submarine crossed the North Pole?" Little Elizabeth, who was having a meal, heard the news reported by Yannick's secretary, and her eyes widened in shock. "How is that possible?!" She also knew that there was sea water under the Arctic glacier. In theory, the submarine could survive, but the problem was the oxygen inside the boat. If the submarine cannot surface for ventilation in time, it may not be able to survive for two or three days and the entire army will be annihilated.

Yannick smiled easily. "Technology is developing at a rapid pace, and nothing is impossible. Do you want to ask about the oxygen of submarines? Then do you know what drives the Nautilus in "Twenty Thousand Leagues Under the Sea"?"

Little Elizabeth nodded. "Electricity, powered by sodium/mercury cells."

"That's right, our submarine uses the latest power system. It can provide almost unlimited power and can break down water electricity into oxygen, so there is no need for the submarine to surface for ventilation."

Little Elizabeth nodded in realization. "Brother Yanik, have you occupied the North Pole?"

"Occupation doesn't count, it counts as control at most." Antarctica is a continent and does not belong to any country. The North Pole is an ice cap and belongs to the high seas. But occupation and control seem to be similar. From now on, the North Pole will be the German navy's sphere of influence, and others will have to ask for their permission if they want to approach it.

The reason why Yannick values ​​the Arctic so much is because it is a "feng shui treasure" for lurking submarines.

During the Cold War era of the original time and space, the Arctic was a military arena for the Soviet Union and the United States.

The United States developed the world's first nuclear submarine, the Nautilus, just as the Soviet Union had just launched satellites into space. The United States lost a move in the sky, and it naturally had to find it in the sea. So the United States dispatched the USS Nautilus nuclear submarine to successfully cross the North Pole in July 1958.

The Soviet Union, which was tit for tat with the United States, naturally would not let the Americans dominate this place and quickly developed nuclear submarines to compete with it. At first, the nuclear submarines of the United States and the Soviet Union shuttled through the ice sea just to show their strength. However, in the subsequent competition, the Soviets discovered that the Arctic Ocean was a good place for their submarines to lurk.

With the emergence of strategic nuclear submarines, submarines have changed from a sideline role in naval battles to a real "killer". For nuclear submarines, the biggest natural enemy is enemy anti-submarine helicopters or aircraft. Once discovered by these enemies from the sky, there is no other countermeasure except avoidance.

At this time, the role of the Arctic ice cap comes into play. Submarines operating in the Arctic have ice caps to cover their whereabouts. No matter how powerful the enemy's anti-submarine aircraft and helicopters are, they cannot penetrate the ice cap to attack submarines. When waiting under the iceberg, nothing can threaten it except the enemy's tactical nuclear submarines, so the Soviet nuclear submarines can move around here without being threatened by the air. As long as strategic nuclear submarines hide well and emerge when they need to launch strategic nuclear weapons, it will naturally be safer with Arctic icebergs covering their heads. At the same time, as for ballistic missiles, the shortest distance between the United States and the Soviet Union is the Arctic Ocean. Submarines launching strategic missiles here can reach the other side's territory faster than crossing the Pacific Ocean, and can quickly attack the other side's strategic targets. Therefore, both the United States and the Soviet Union are This area is densely covered with strategic weapons.

In this way, the Arctic Ocean completely turned into a duel field for nuclear submarines from the United States and the Soviet Union. Undercurrents have become dense under the Arctic Ocean, and the overt and covert struggles during this period are naturally extremely thrilling. It almost triggered a world war on many occasions, the most famous of which was the collision between the K-19 submarine and the USS Nautilus. At that time, the two sides used nuclear weapons to confront each other, and almost went off. A world war was imminent.

Interestingly, Germany also secretly built two submarine bases in the Arctic during World War II, and even the Soviet Union did not discover them.

It is said that on April 30, 1945, the eve of the German army's announcement of surrender, 30 of Germany's most advanced submarines set sail from ports in the Baltic Sea. No one knew what was loaded on these submarines, and no one knew where they went. There are only some unconfirmed rumors that these submarines were occupied by German officers and soldiers who still had hope for the war. They brought various weapons, technology and supplies and chose to come to the Arctic base. The total number of people was about 800. They are secretly lurking here, seemingly waiting for the relationship between the United States and the Soviet Union to break down, and then looking for opportunities to rise.

Under the conditions at that time, life in the Arctic was very difficult, and they could only rely on themselves to live a hunter-like life. Gradually, some people could not bear the suffering and chose to flee again and return to civilized countries. This also led to the final exposure of the German Arctic base. In 1948, the U.S. military launched an operation in the Arctic called "Sturgeon". More than 2,000 U.S. troops landed near German bases and completely destroyed the two bases.