Traveling through the sword to engage in military industry.

At Midway Island, Ma Yingwei harvested the first wave of vegetables, nearly 100 kilograms of cabbage, lettuce and water spinach.

With full-spectrum LED, Ma Yingwei can adjust the lighting time. By providing longer lighting time than normal external exposure, the growth cycle of vegetables is also shortened. The cultivation of organic soil and the scientific configuration of organic fertilizer, coupled with the lack of interference from external diseases and pests, make the vegetables on the submarine grow more tender.

It can even be used to make vegetable salad, so even if you just blanch them in boiling water and mix them cold, these vegetables will make everyone enjoy it!

It relieved the oral cavity pain caused by eating bean sprouts and canned food for a long time.

Although they couldn't eat as much as they wanted, with this supplement, the soldiers didn't feel that life on a submarine was much different from life on land. Apart from being careful not to make noise and speaking in a low voice, the physical and mental state of the officers and soldiers who were driving such a long-distance stealth for the first time did not change much.

This somewhat disappointed the two doctors who had hoped to show their skills.

After all, under such harsh conditions, everyone is in good health, no one is sick, and even few people suffer from mouth ulcers. It is simply unscientific.

In this era, generally speaking, even on a surface ship, if the sailors are at sea for a long time, most of them will have some serious illnesses.

However, this is this time and space, with the knowledge of the main world to draw on, Ren Zhong had already provided detailed special technical information for the life support of the officers and soldiers of the nuclear submarine, so agricultural experts and doctors were able to board the boat on the first voyage.

There is nothing wrong with hard work, but if conditions permit, it would be better to improve the living conditions of these warriors.

More than 10 days later, the nuclear submarine No. 001 passed through the Amuqta Strait and entered the Bering Sea.

After entering the Bering Sea, the atmosphere on the submarine suddenly became tense.

Thanks to the information from the main world, on the submarine, basic information about the ocean that it plans to cross is obtained from public channels.

So, after entering the Bering Sea, Liu Wensheng convened a general meeting of all staff.

"Comrades, the time has come to test us!" Liu Wensheng said to the communication system on the boat.

"In a few days we will arrive at the area around St. Lawrence Island and the Bering Strait, where the ocean depth will be only 30 to 50 meters. Our submarines will face all-round monitoring from the air and the seabed by the two superpowers. There is a great possibility that our targets will be exposed and we will be chased or even attacked by our opponents!"

Liu Wensheng's voice echoed in every corner of the submarine.

Everyone listened in silence. In fact, these things had been explained before departure. Passing through the Bering Strait would be one of the most dangerous waters of this voyage.

There are nearly 800 kilometers of sea areas with a depth of less than 100 meters, and where the two superpowers border, here is one of the most intensively monitored hotspots on the Blue Planet!

There is no other way for the 001 nuclear submarine to deal with these surveillances but to face the challenges head-on!

"For this reason, I require all officers and soldiers on the boat to stop all activities that may cause noise after three days, including cooking in the kitchen and maintenance work on the boat. All maintenance work must be completed within three days to ensure that the entire boat will not make any noise caused by maintenance work in the next few days. Except for observers reporting the situation, all officers and soldiers do not need to communicate in writing!" Liu Wensheng reiterated the request.

The officers and soldiers who obey orders have no doubts about these requirements. They will respond to Liu Wensheng's demands with practical actions.

Some people may not understand why, when the noise from submarines is 110 decibels, it is necessary to limit the noise made by people on the submarines. Isn't that a small matter compared to a big one, and has no effect on the noise reduction of submarines?

In fact, this is not the case. Testing noise levels on land and in the ocean are two different concepts.

For example, on land, when decibels are used specifically to measure sound intensity, 1 decibel represents the smallest sound that most people can just hear; below 15 decibels, it means that most people feel it is very quiet; 30 decibels is equivalent to someone whispering next to you; 40 decibels is equivalent to the hum of daily cooling in the refrigerator at home; 60 decibels is equivalent to the volume of normal face-to-face conversations for most people; 70 to 85 decibels is equivalent to a busy downtown area with traffic; 95 decibels is equivalent to someone starting a motorcycle next to you.

It can be seen that an environment with a noise level above 70 decibels is considered quite noisy.

Internationally, the decibels used to calculate underwater noise are the same as the simple unit values ​​used to measure air noise; however, the benchmarks for evaluation are different.

Generally speaking, zero decibels on land refers to a sound pressure of 20uPa, but in underwater acoustics, 1uPa is 26dB, which means the difference between the two is 52 decibels. The so-called ocean background noise of 95dB is actually equal to 43dB of noise in the air, which means that the combination of simple natural water flow, fish schools passing by, and other sounds in the sea starts at 43dB, which is similar to the humming sound of our daily refrigerators.

The current top-level submarines are about 110 decibels, and most of the rough stuff of Big Bear is still around 140 to 150 decibels. In other words, the noise emitted by all the mechanical equipment of a top-level silent submarine is about 58 decibels, which is equivalent to a face-to-face conversation between people!
Therefore, after the submarine enters combat status, if people are talking, it will have a great impact on the submarine. Even if the submarine is a sealed space that blocks human voices to a certain extent, the steel plates of the submarine cannot be very thick. Generally, it is around 30 mm. Some places may be thicker, but some places may be thinner.

Places like torpedo launchers require channels to be left for launching things.

Therefore, the noise inside the boat should be kept as low as possible.

Not cooking is no big deal.

In fact, in the main world, early submarines did not have any hot food to eat, and there was plenty of bread, canned food, instant noodles, and instant rice.

When it comes to the diversity of convenience foods, there is no other place in the world except Dongda University at this time and place.

Today, these types of food are still the second largest category of commodities that make Dongda a lot of money, second only to the textile industry.

However, after electronic products such as televisions and microwave ovens began to gain volume, their growth rates were astonishing. Ren Zhong estimated that within a few years they would surpass the above two traditional industries and begin to become the largest industry.

In the submarine, Liu Wensheng's voice was still transmitted, "Comrades, at this decisive moment, I require all officers and soldiers to strictly demand themselves, strictly abide by discipline, operate rigorously, and activate the first level of combat readiness, and the torpedoes are ready to fight at any time."

Although fighting is the last resort, when attacked by the enemy, Liu Wensheng cannot passively take the beating and must choose to fight back!

According to the current weapons and equipment in submarines, there are a total of 26 533mm heavy torpedoes. It is a bit exaggerated to kill a fleet, but it is very likely to kill several submarines or destroyers that attempt to catch up or annihilate them. Don't forget that this heavy torpedo can kill a destroyer with one shot!

As for submarines, encountering them means death!
Otherwise, with the Qin-class nuclear submarine's extraordinary underwater speed, enemy submarines and even torpedoes of this period would have little way to deal with it.

The only thing that is relatively dangerous is a fast destroyer releasing heavy depth charges!
"Comrades! When two sides meet on a narrow road, the brave prevail. Our No. 001 nuclear submarine is responsible for the groundbreaking task in the history of the Celestial Navy. Every step we take today is a new step that has never been taken by our predecessors!
For victory, obey orders and fight to the death! "

Liu Wensheng used three clean and powerful words as the closing remarks of his pre-war mobilization, which made all the officers and soldiers in the submarine excited. They clenched their fists silently, raised them in the air and waved them continuously to vent the excitement in their hearts.

Even an outsider like Ma Yingwei was so excited that his heartbeat soared to 180!

The journey ahead was so smooth that everyone forgot that it was a tough battle!

After all, in the vast Pacific Ocean, with the superior super diving depth of the Type 001 nuclear submarine, there is no chance of being discovered by the enemy. In the enemy's mind, there is no concept of a submarine that can dive to a depth of 400 meters!

Therefore, whether it is sonar or any other detection tools, they will not be used to study such deep seabed.

So on the Pacific Ocean, as long as you maintain your sailing direction and don't get lost, and make sure there are no underwater mountains blocking the way, you can just sail at full speed!
Today's nuclear power reactors have no difference in economic cruising speed, and the reactor fuel design with a lifespan of up to ten years allows for a global voyage to be completely possible!

After entering the Bering Sea, the submarine was still in deep sea for the first three days. Liu Wensheng commanded the submarine to move forward at full speed. The engineers of the maintenance team conducted a comprehensive final inspection and made sure that the submarine had no electromechanical or reactor abnormalities.

Three days later, when the depth of the sea gradually increased from several hundred meters to less than a hundred meters, Liu Wensheng began to slow down the speed of the submarine, slowly slowing down to 18 knots per hour, and then stabilized the submarine's diving depth to 40 meters.

All irrelevant extra tasks and actions on the submarine were stopped, and even the movement inside the cabin was reduced a lot. There was no need, and the officers and soldiers all stayed at their posts.

Even people who were reading began to turn the pages carefully, without making any sound.

"Commander, shut down the active sonar completely and activate the passive sonar!" The latest news flashed on the command screen in the command cabin. Even the submarine's avionics information was now transmitted silently through the computer.

"Everything is normal for now."

"The communication frequency has decreased and has entered a low-frequency response state."

Low-frequency response. According to the prior agreement, the contact with the headquarters was reduced from 10 minutes to once an hour, and the signal transmitted to the satellite was more concise, with only one latitude and longitude information indicating that everything was normal!
In this way, the headquarters can see the current location of the No. 001 nuclear submarine through the changes in track, and predict where it should arrive in the next hour.

It can be said that it uses the least information to express rich connotations.

Liu Wensheng's command computer screen is the latest 18-inch large screen, which can display the status of most of the key equipment on the entire ship and the current physical status of the submarine!
Therefore, even if no one reports, he can understand the situation of the entire submarine through the sensor data on the entire ship.

As the speed decreased, the noise of the No. 001 nuclear submarine also dropped by several decibels. It is now just over 100 decibels. According to the decibel standards on the road, it is roughly at the level of whispering.

But Liu Wensheng didn't dare to be careless.

He was concentrating on watching every line of information flashing on the command screen, including speed, diving depth, underground altitude, and the seabed topography ahead.
There is even a camera monitoring screen next to it, which transmits real-time images of the seabed in front of the submarine.

The fish were in groups and were being rushed by the big black fish. The fish in front seemed to know that they could not afford to offend them and they fled in all directions!
If an old fisherman who has been fishing at sea for many years sees such a scene, he will inevitably say that the seafood resources here are really good.

Suddenly, a warning appeared on the command module!
"A school of whales ahead!"

Liu Wensheng's heart tightened!
He took his eyes off the command screen and looked at the video surveillance screen next to it. Sure enough, a group of huge whales appeared vaguely not far ahead. They were killer whales!
This is one of the ocean overlords that is fearless. Even facing the huge nuclear submarines, they are not afraid and will still rush towards the nuclear submarines!

"Slow down and turn the rudder for emergency avoidance!" Beads of sweat suddenly appeared on Liu Wensheng's forehead. If they collided head-on and both sides used all their strength, the collision force would be enough to cause a nuclear submarine to collapse!

You should know that the killer whale can reach an astonishing speed of 55 kilometers per hour at full speed, which is almost the same as the design speed of the Type 001 nuclear submarine!

If there was a head-on collision at full speed, an adult killer whale could weigh five or six tons, which would be equivalent to a truck hitting it at 110 kilometers per hour!
Even if the killer whale's body is weaker than steel, the rigidity of the submarine may not be able to withstand such a full-speed collision!
But in the ocean, killer whales don’t know what avoidance means!

After the speed slowly decreased, the group of killer whales seemed unaware and continued to swim forward at their normal diving speed. As for the nuclear submarine in front of them, a small young killer whale caught up with it, wagging its tail, and was ready to try its mouth, but it ended up breaking its teeth with a bite!
Then it slapped the huge hull of the nuclear submarine with its tail in anger and swam away! The killer whale next to it also knew that this was not a good food, and swam past without even looking at it.

In this way, the nuclear submarine that slowed down was like a big fish in the sea. The killer whales naturally separated themselves from the nuclear submarine through the water current and met them on both sides, thus passing through safely.

Liu Wensheng broke into a sweat and then breathed a sigh of relief. You have to know that this was a large school of more than 20 killer whales. If they were really startled and made to rush around in the water, it would not be pleasant even if they could win.

Maybe it will have a dozen holes on it due to the impact.

Fortunately, a real-time surveillance TV was installed, which gave Liu Wensheng some time to evade the situation.

Anything could happen in this sea, and Liu Wensheng's already tense nerves were once again sounded the alarm.

"Slow down to 15 knots and cruise, pay attention to the fish and the seabed conditions!" After typing on the keyboard for a while, Liu Wensheng issued a new order.

(End of this chapter)