After placing the voiceprint collection balls on the other side of the Pacific Ocean.

Luo Feng continued non-stop, heading towards the Indian Ocean and the Atlantic Ocean.

As for the Arctic Ocean.

No need to place it.

The small ball coverage of the Pacific Ocean and the small ball coverage of the Atlantic Ocean can be covered by the way.

Because the location where Luofeng is placed is towards the north.

Naturally, it is to take care of the Arctic Ocean.

One day passed, and Luo Feng already had information and data on submarines around the world.

However, these submarines do not always stay in place.

They are always moving and running around.

Although some submarines are indeed lying down, most of them are very active, like children.

As for these lying submarines, the engines are not turned on, and the voiceprint ball can only collect their appearance and size, but the voiceprint cannot be collected.

But when they start moving later, the voiceprint ball can collect their voiceprints again.

Three days have passed. As more submarines began to move, Luo Feng's voiceprint database became more complete.

Unless those submarines never turn on their engines underwater, Luo Feng will not be able to collect their voiceprints.

But if you don’t turn on the engine and keep moving, aren’t you just like scrap metal?

But as soon as you move, your voiceprint will be collected immediately.

During these three days, Luo Feng also paid great attention to the sea area. What shocked Luo Feng was that he did not expect that China's sea area was still very large.

Although there are only more than nine million people in the interior.

However, the eastern and southern coastlines exceed 18,000 kilometers, and the inland and coastal waters cover more than 4.7 million square kilometers.

There are approximately more than 7,000 islands.

Of course, the all-terrain detective particles only last for three days, but Luo Feng doesn't need them anymore. They were originally used to place the balls. Once they are placed, they will definitely not be needed.

However, Luo Feng still dropped more all-terrain detective particles in the Chinese sea area. In other words, Luo Feng wanted to know the situation in this area for a long time.

As for other places, Luo Feng has no interest at all.

Although there are many particles, they cannot be made like this.

At this moment, Luo Feng is lying on the big bed in the villa. On the surface, he is wearing 3D glasses to watch a movie, but in fact, he is watching some fish in the ocean.

All of a sudden.

Luo Feng saw a huge thing.

Soon Luo Feng also realized that this must be a submarine.

I have been watching the situation in the Chinese waters for the past three days, and I actually encountered a submarine.

You know, this is a vast sea. If you don’t have the fate that has been cultivated for hundreds of years, most of these submarines will pass you by.

Luo Feng immediately became curious and focused on this submarine.

This submarine was in the shape of a water droplet. Luo Feng just observed and followed it for a while before he knew the identity of the other party.

Fortunately, this is a Song-class conventionally powered submarine from China.

Of course, this is a code name.

The full name is Type 039 conventionally powered submarine, known in the West as Song class.

This is the latest generation of domestic conventionally powered attack submarines in China, and all indicators have reached the world's advanced level. It first attracted the world's attention in May 1994, when US reconnaissance satellites discovered that a new conventional submarine was launched from the Wuchang Shipyard.

This is the Type 039 submarine that our country has been developing since the mid-1980s.

The main technical parameters of the Song-class submarine

Displacement: 1700 tons (on water); 2250 tons (underwater).

Main dimensions: 74.9 meters long, 8.4 meters wide, and 5.3 meters draft.

Host:

Diesel engine-electric propulsion; 3 German MTU2V493 diesel engines; 7-blade large inclined propeller, single shaft.

Speed: 15 knots (on water), 22 knots (underwater).

Endurance: 3300 nautical miles/4 knots (underwater)

Establishment: 60 (including 10 officers).

Weapons: YJ-1 (C801) submarine missile, 6 533mm torpedoes, launches "Yu"-4 self-guided torpedoes, and has 18 bombs.

Mines: Replace torpedoes.

Countermeasures: Electronic support: Type 921-A; radar warning.

Radar: Surface search, I-band.

Sonar: A spherical mid-frequency sonar is installed on the bow of the boat, which is used for active/passive search and attack; mid-frequency. The side of the boat is equipped with a low-frequency passive search sonar array, low frequency.

Structure: The main dimensions are similar to the Ming class, but it has a single canted propeller and a spherical bow sonar. The bow horizontal rudder is located on both sides of the trapezoidal podium enclosure under the front part of the cockpit, and the rear part of the enclosure is used to accommodate various lifts.

Mast.

Now, Luo Feng felt a lot more relieved.

As for the history of coastal defense in the Dragon Kingdom, it also started from scratch.

At the beginning of the 1980s, the Navy only equipped imitation versions of Type 033 conventional submarines and a small number of Type 035 submarines.

However, both submarine technologies are very backward and cannot meet the needs of modern warfare.

So under such circumstances, the country later worked hard and focused on research, with the goal of developing a new generation of conventional submarines, which was listed as a key project of the navy at that time.

Fortunately, after more than ten years of hard research, in the 1990s, the Song-class submarine, with various indicators reaching the world's advanced level, made the whole world shine.

Luo Feng followed this Song-class submarine with his eyes. Although it was not as nimble and agile as those fish, the dark steel revealed an awe-inspiring and calm atmosphere.

"There are still a lot of submarines in our waters!"

"But aren't they all our own submarines?"

Thinking of this, Luo Feng also checked the collected voiceprint information, as well as appearance and size.

Although Luo Feng learned a lot about submarines in a few days.

But in fact he is just a layman.

Analyzing these data, it is impossible to tell whether these submarines in our waters are our own submarines.

Perhaps only professionals can know by comparing the data?

As for this Song-class submarine, Luo Feng recognized it because he saw photos when he learned about submarines.

And if you just look at the voiceprint data and appearance description of the Songjiang submarine.

Then Luo Feng wouldn't recognize it as a Song-class submarine.

Thinking that some of these submarines may not be his official ones, Luo Feng felt as if there was a lump in his throat and he couldn't vomit.

Be sure to find out.

Luo Feng quickly compiled all the information on these submarines into a file.

These submarines are already all domestic submarines, and they also include submarines from other countries.

After grabbing the USB flash drive and computer, Luo Feng booked a plane ticket and headed directly to the Magic City.

The destination is of course the Magic City Military Industry.

Of course, Luo Feng had to talk about such things in person, and he also had to deliver these materials to the other party in person.

This time when he came to the Magic City Military Industry, Luo Feng still didn't make too much publicity and just informed Zheng Zeyao.

"Brother Yao, find someone knowledgeable to help me look at these data!" Luo Feng handed over the USB flash drive, "This is some submarine data!"

"Submarine data? What do you mean?" Zheng Zeyao looked at the computer in confusion, "This is the Song class, this is the Xia class..."

"Can you recognize some of them?" Luo Feng said with shame. Sure enough, he was from the military industry. He was much better than a layman like himself.

"It's just some size and appearance data, I can barely recognize some of them!"

Then Zheng Zeyao started watching again.

He slowly recognized the models one by one.

And introduce it to Luo Feng.

Sure enough, the most submarines in our own waters must be our own submarines.

Under the vast ocean, they silently protect everyone, but few people know about it.

But soon, Zheng Zeyao also recognized several foreign submarines.

"This seems to be the US Virginia-class nuclear-powered attack submarine, right?"

After looking at the appearance and size of the submarines provided by Luo Feng, Zheng Zeyao said in an uncertain tone.

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