A moment later, the Hidden Dragon, which had been forbidden to be in the sea, began to start.

"Huhuhu...... Buzz Buzz...... Whew......huhu"

The propeller rotated rapidly, and a roaring sound was heard.

"Gurgling ......"

The propeller burst into bursts of white droplets, and the entire nuclear submarine began to move forward rapidly.

When fighting the Japanese aircraft carrier battle group, the Qianlong nuclear submarine has been upgraded, and there are many upgrade functions, one of which is that it can evade the sonar system.

However, in addition to dodging the sonar system, other aspects of the Qianlong have also been upgraded, such as the speed, which was originally only 30 knots, but now has reached a speed of 40 knots.

In the navigation speed of warships, one section is equal to one nautical mile, which is 1.852 kilometers, and the speed of 40 knots is 74.08 nautical miles in an hour, and the speed can be said to be 11 is very fast.

Generally speaking, the maximum speed of diesel-electric power submarines is only 12~20 knots, and the fastest speed of nuclear power is only about 35 knots, so the speed of the Qianlong nuclear submarine has reached 40 knots, which is already very fast.

Another change is the arsenal system of the submarine Qianlong, which originally carried 6 torpedo tubes, fired MK48 torpedoes, and was equipped with primary missiles!

But now the Qianlong can launch ultra-short-range missiles, that is, missiles about 200 kilometers or so, in other words, Li Yunlong does not need to be close to the coast of Japan to bomb the mainland of the island country, and can use missiles to bomb from a distance!

This is definitely unexpected for the little devils!

"Buzz...... Woohoohoo......"

Li Yunlong handed over the route he had planned to Xie Qian, and asked him to direct the advance of the Qianlong according to his route.

in the command module.

Xu Yihang looked at the dark deep sea, and then said, "Brother Li, when will we arrive at the predetermined location!" ”

"If the Qianlong is moving at full speed, it will take about 10 hours!" Li Yunlong opened his mouth and said: "The distance from Yingkou Port to the Sea of Japan is about a few hundred nautical miles!" ”

Xu Erhang looked nervous, and muttered to himself: "I hope this mission can be safe and smooth!" ”

"Second Airlines, don't be so nervous!" Li Yunlong said very easily: "Let's just go and bomb the mainland of the island country and give the little devil a warning!" ”

It can be said that all the personnel of the entire Qianlong warship are very nervous and maintain a high degree of vigilance, and only Li Yunlong will be so relaxed.

"Buzz...... Whew......huhu"

Soon, after several hours of sailing, the group arrived at the Bohai Strait.

The Bohai Strait is the second largest strait, located between the Shandong Peninsula and the Liaodong Peninsula, and is the dividing line between the Bohai Sea and the Yellow Sea. It is the only channel for maritime traffic at home and abroad.

Strategically, the Bohai Strait is an important place for coastal defense, with more than 10 large and small waterways, which is the throat of the Bohai Sea and the maritime gateway of Beijing-Tianjin-Hebei. Strategic position is very important.

"Report to the commander, the four Bohai Straits ahead!" Xie Qianlang reported.

"There's no problem with the Qianlong passing through the Bohai Strait, right?" Li Yunlong asked loudly.

"Report to the Commander, there is no problem!" Xie Qian said: "It's just that most of the Bohai Strait is occupied by the Japanese army, and when we pass through, in order to reduce the possibility of being discovered, the speed will slow down!" ”

"Yes, ensuring the concealment of the submarine comes first!"

"Yes!"

Immediately, the speed of the submarine slowed down and slowly passed through the Bohai Strait.

After passing through the Bohai Strait, it entered the Yellow Sea.

The Yellow Sea is a marginal sea in the western Pacific Ocean, a semi-enclosed shallow sea with an approximately north-south direction. The average water depth is 44 meters, and large areas of water are yellow.

"The sea ahead is the Yellow Sea!" Xie Qian kept reporting on the position of the Qianlong.

Li Yunlong nodded, the speed of this submarine is still very fast!

Because the Yellow River has been flowing into the Yellow Sea for more than seven or eight hundred years in history, a large amount of sediment carried by the river has dyed the sea water near the Yellow Sea yellow, which is very suitable for the concealed action of submarines, and the sea area is about 80,000 square kilometers, with an average water depth of 40 meters and a maximum water depth of 86 meters. This is also very conducive to the advance of the submarine.

"Buzz...... Whew......huhu"

In the area of the Yellow Sea, the Qianlong increased its speed to a maximum of 40 knots, and quickly shuttled through the water.

Although there will be Japanese invading warships on the surface of the Yellow Sea, because of the secrecy of the Qianlong, it is impossible to find the Qianlong at all.

A few hours later, the Hidden Dragon entered the Sea of Japan.

The Sea of Japan, known as the Whale Sea in ancient times, is the largest marginal sea in the Northwest Pacific Ocean, with a sea area of about 1 million square kilometers. The whole sea area is slightly elliptical 733, with a length of 2,300 kilometers from north to south, a width of 1,300 kilometers from east to west, an average water depth of 1,350 meters, a volume of 1,713,000 cubic kilometers, and a maximum depth of 3,742 meters.

It can be said that the Sea of Japan is a real deep sea, and compared with the inland seas such as the Yellow Sea and the Bohai Sea, the depth and basin area are much higher.

Although it is called the Sea of Japan, not all of this area belongs to Little Japan, and there are many areas of the high seas.

"Buzz...... Whew......huhu"

After entering the Sea of Japan, Xie Qian's whole person immediately became more nervous, and Li Yunlong patted Xie Qian and said, "Don't be nervous, you will only fight when you arrive at the combat position!" ”

"Yes!" After Xie Qian heard this, he turned to the herald next to him and said, "Order all members to maintain the highest vigilance and be ready to fight at any time!" ”

"Yes!"

Orders are delivered quickly!

This is the first time that a warship has stepped out of its own sea area!

ps: The fifth update, I recommend the friendly books "Snow Leopard Fighting Wolf World", "The Strongest Military God of the Anti-Japanese War", "The Extreme Agent of Special Forces", and "The God-level King of Real Manhood".