The XXI-2 submarine sounds like a modification of the XXI submarine, which seems to make sense, after all, the current XXI submarine is still a secret to the outside world, and the only 2,000-ton submarine has subverted many people's understanding.

However, this model is only used to hide people's eyes, just look at a little, this so-called modified submarine, the underwater displacement is more than 6,000 tons.

This data alone is enough for it to dominate the entire era, and once this submarine appears, it will rewrite the entire history of submarine warfare.

Almost all submarines, that need to surface for ventilation, but this kind of submarine does not use.

From the outside, it is almost a synchronously enlarged XXI type submarine, after all, the latter is also a submarine built by Germany for underwater navigation, elongated drop-shaped, underwater speed exceeds water speed, is the correct submarine shape scheme.

But the interior is a world away from ordinary submarines, it also has batteries, but the capacity of the batteries is less than one-fifth of that of XXI submarines, and it is only used to provide emergency power.

Its rear, where the diesel engine was originally placed, has been replaced by a steam turbine, connected by a reduction gear to a propeller at the tail.

And in front, there are atomic boilers, which are terrible power reactors that can provide almost unlimited endurance.

In fact, even during World War II, Germany had already begun to develop nuclear reactors, but at that time, it was just because it felt that the nuclear bomb could not be built successfully, so it had to change its thinking and find something to do.

And in this time and space, Germany's science and technology has developed tremendously, under the impetus of Ciric, there have long been test reactors for nuclear reactors in Syria, which have been operating safely for seven or eight years, and for the development of nuclear submarines, they have also built special land simulation reactors, and by now, the first generation of pressurized water reactors has been considered mature.

In order to ensure maximum safety, the pressure inside the nuclear reactor is not high, and the power is not large, so that the submarine can only travel at a maximum speed of 15 knots, but it is still of epochal significance.

It doesn't need to surface for the entire duration of the mission, it will be an underwater ghost that can appear anywhere!

The nuclear submarine is a systems project, not just the installation of a nuclear reactor on a conventional submarine, the entire layout has been changed, and there are some new systems, such as the production of oxygen by electrolysis of seawater, and the desalination of seawater by electricity, these are new requirements.

For ordinary submarines, fresh water is carried before departure, and oxygen is obtained by ventilation when floating, while nuclear submarines have to be underwater for a long time, and everything has to be solved by themselves, relying on sufficient electricity.

In addition to these, Ciric also put forward some new ideas, such as laying sound-absorbing tiles on the outside, using seven-bladed large side tilt propellers, these proposals are very valuable, and technicians are researching, and these new technologies, although the nuclear submarine has been launched for a year or two, is still in the test.

For example, a few months ago, the nuclear submarine was sent to the dock for a major change, cutting off the original three-bladed propeller and replacing it with a new seven-bladed propeller, and at the same time changing the gear speed ratio of the reducer.

It can be said that the current technology is impossible to discover this terrible nuclear submarine, an absolute deep hole in the ocean.

According to scientific principles, this nuclear submarine must undergo sufficient sea trials and be fully improved before it can be built in batches.

And now, the German Navy can't wait to demand such big guys.

"It is expected that there will be a few more months between our cutting off of the American fleet in the Atlantic Ocean and their choice of the Pacific route, and during this time, there will be enough for our submarines to be arranged." "This time, it's time for our submarines to put on a brilliant operation," said Ciric. ”

"Yes." Hearing this, Dönitz's eyes were filled with gold, and it was finally the turn of the submarine forces to step on the main battlefield, let them go to the Bering Sea to show their skills! In particular, at that time, the nuclear submarine had already completed sea trials and could be tested in real combat.

After discussing the matter of the navy, Ciric's eyes continued to rest on the map.

Great progress has been made on both the northern and central fronts, and on the southern front, on the vast plains of Ukraine, the German tank forces are galloping even more.

After the end of the fighting in the Dubno-Lutsk-Rivne area, the German tank cluster is advancing towards the Ukrainian capital Kyiv.

Almost as in history, Shirek was waiting for a large-scale siege of Kiev that would continue to undermine the confidence of the Soviets, and with Manstein in charge of the southern route, Shirek had no worries.

Shirek is confident that the news of victory in the siege of Kyiv will come soon.

"The Romanian army has also recently completed its move, and they intend to send troops soon to attack Osad." Keitel said to Ciric.

Odessa, a city in southern Ukraine, the capital of Odessa Oblast.

It is located 30 kilometers northeast of the mouth of the Dniester River into the Black Sea, and is the largest port city on the Black Sea coast and an important industrial, scientific, transportation, cultural, educational and tourism center.

For now, it is an important port in southern Ukraine, one of the stations of the Black Sea Fleet, which, if obtained, would block the passage of Soviet reinforcements from the sea.

And although Germany has a large army, after all, the area spread out is too wide, and now it is better for the Romanian army to attack Ozard for Germany.

"We don't have much strength at our disposal now, so we can only send about a regiment in size to assist the Romanian army in its attack." "And the combat effectiveness of the Romanian army is certainly not comparable to that of our imperial army, and it seems that the battle for the attack on Ozard may last for a while, even more than a month," Keitel said. ”

"Yes, our ground forces are very tense right now, and we can't spare our hands until we encircle and annihilate the defenders on the Kyiv and Uman sides, but we can send out the navy and enter the Black Sea to reinforce the ground forces."

The Black Sea was almost an inland sea of the Soviet Union, and access to the Mediterranean Sea was only possible through the Turkish Straits, and now the entire Mediterranean Sea was controlled by Germany, and the passage of the Soviet Navy out was strictly controlled.

In this case, it was also impossible for the German Navy to enter the Black Sea, using naval firepower to reinforce the ground battle.

"In order to avoid being attacked by Soviet naval aviation, I propose to continue to use the Goethe-class aircraft carriers, with three carriers carrying sixty carrier-based aircraft, which are enough for these tasks." Raeder said.

The precious Count Zeppelin-class aircraft carrier was supposed to fight in the ocean, and Raeder didn't want to suffer losses in the Black Sea.

Ciric nodded, and was about to continue, when he saw Goebbels walk in with a strange expression on his face.

"Führer Ciric, I have a bloody letter here."