Iron-blooded Hero Li Yunlong

It would be great if this time the reward was about how to deal with the carrier!

Without the slightest hesitation, Li Yunlong immediately said, "Check the rewards!"

"Receive the reward, consume 1000 weapon points!"

"Congratulations to the host for obtaining the ability to upgrade Qianlong, may I ask if you want to upgrade!"

Qianlong, this is a nuclear submarine rewarded by the arsenal system. In the Battle of Shanghai, by virtue of unexpected tactics, it destroyed the Japanese Third Fleet and won a complete victory!

"What ability is 5.5 after the upgrade?" Li Yunlong asked. .

"After the Qianlong has been upgraded, it has gained a function: it can avoid the tracking and positioning of the sonar system!"

Avoiding the tracking and positioning of sonar systems?

This reward came at a really timely time!

PS: In the fourth update, I recommend a few good entertainment books "Super Entertainment Lover", "Live Broadcasting Super Pseudo", "First Grade Super Student". .

Chapter 790 The three major trump cards against aircraft carriers! (Fifth update, please subscribe)

After the upgrade, can Qianlong avoid the tracking and positioning of sonar?

Hearing this reward, Li Yunlong was slightly astonished for a moment, and then he was overjoyed: "This reward really came too timely!"

In the early and mid-term of World War II, almost all warships, aircraft carriers, etc. were equipped with sonar systems.

Sonar uses sound to navigate and measure distances. It is a method that utilizes the propagation characteristics of sound waves under water, through electro-acoustic conversion and information processing.

In this dark underwater, only the sound waves are constant, and the conditions are unique!The penetration ability of light in water is very limited, and electromagnetic waves also attenuate too fast in water, and the shorter the wavelength, the greater the loss, but sound waves are different, and the attenuation of sound waves propagating in water is much smaller.

Generally speaking, if a huge bomb suddenly explodes in the deep-sea sound channel, then the signal can still be received at least 11 kilometers away, and if it is a low-frequency [-]-frequency sound wave, it can also penetrate the bottom layer of the seabed thousands of meters away , very scary.

It is precisely because of such characteristics that sonar systems were widely used in warships during World War II, especially submarines, because submarines are basically invisible to the naked eye in the sea!

Whether it is a warship or a submarine, there must be sound when navigating in the water, so the use of sonar can basically locate the position of the warship or submarine.

Although the Qianlong submarine is a submarine, it will still make a sound when moving forward in the water, and it will be detected by the Japanese sonar system immediately.This is very disadvantageous.

If after the Qianlong is upgraded now, it can avoid the pursuit of the sonar system, which means that the sonar system of the Japanese army cannot detect the Qianlong nuclear submarine.

This is without a trace!

"Upgrade, upgrade the Qianlong nuclear submarine immediately!" Li Yunlong said without hesitation.

"Ding dong... the Qianlong nuclear submarine is being upgraded!"

"Ding dong... The Qianlong nuclear submarine has been successfully upgraded!"

In just a moment of effort, the Qianlong nuclear submarine has been successfully upgraded!

The upgraded nuclear submarine can basically avoid the tracking and positioning of the sonar system, which is equivalent to an invisible nuclear submarine.

This is Li Yunlong's trump card!

Submarines can be said to be the most important means of dealing with aircraft carriers. As long as they get close to the aircraft carrier and use torpedo bombing immediately, it can definitely deal a fatal blow!

Seeing that Li Yunlong was so nervous and worried, Xu Erhang said, "Brother Li, why don't we go and relax, let's go!"

"Alright, by the way, take a look at the deployment of the Shanghai coastline!"

Immediately, Li Yunlong, Xu Yihang, and Xu Erhang walked out of the headquarters, and took a walk in Shanghai shrouded in darkness, feeling the city that never sleeps in Shanghai!

Shanghai coastal defense line, the position defense line has already been laid out at this time, and the muzzles of some long-distance anti-aircraft guns are aimed at the endless sea!

The sea surface shrouded in night looks particularly different. Under the illumination of the shore lights, it looks sparkling, especially dazzling and beautiful.

It's a beauty.

But in this sea area, a sea battle will break out!

Li Yunlong, Xu Yihang, and Xu Erhang walked on the shore defense line, while patrolling the soldiers stationed on the shore overnight, while looking at the endless ocean!

Seeing such a beautiful scenery, Xu Erhang suddenly said with sincere emotion: "Master, why do you think there is a war!"

Why is there a war?

This large-scale event has existed since ancient times!

There are many reasons, but there is only one reason!

"Why is there a war?" Li Yunlong took a deep breath and said, "Because of interests!"

"In the final analysis, all wars in ancient and modern China and abroad are nothing more than the word interest. The Japanese invaded us to satisfy their interests, and the Eight-Power Allied Forces invaded us because their interests were damaged!"

"There are many righteous peasant uprisings in our country. In the final analysis, it is because of the word interests. Because their interests have been damaged, they rose up to resist!"

"Benefits, this is the eternal truth. There are no permanent friends, only permanent interests. As long as there are interests, then enemies can also become friends, and friends can also become enemies! Let alone war!"

The ultimate goal of all the actions of people in the world is for profit!

Although Li Yunlong's exclamation is a bit hypocritical, every sentence is the key point, and it hits the point!

Both Xu Yihang and Xu Erhang nodded slightly, agreeing with Li Yunlong's opinion!

Standing on the coastline, Li Yunlong looked at the white and dark sea, with a serious expression on his face.

This is another crisis that Iron-Blooded Sword Master has encountered!