It is about 170 nautical miles to the eastern part of Tokyo Bay.

The sun is slowly setting, and the sea is calm.

The Japanese Navy's Yamato-class aircraft carrier Meiji cleaved the waves and sailed from west to east at a cruising speed of 15 knots.

On the flight deck, a Japanese Type 99 carrier-based fighter (F4U Japanese version) was parked on the take-off line, and the nose propeller slowly rotated, ready to take off.

Not far off the sea, the battleship "Nagato" and the "Meiji" went hand in hand.

Further along the coast, two Furutaka-class heavy cruisers, four Nagara-class light ocean-kees, and eight Akizuki-class destroyers escorted the Meiji and Nagato as they marched eastward.

Seeing that an aircraft carrier battle group of the Donghua Royal Navy was getting closer and closer to Tokyo Bay, in order to maintain the dignity of His Majesty the Emperor, the Japanese Admiralty ordered the entire First Fleet guarding the mainland to leave port and sail to meet the Donghua Royal Navy fleet.

Hirohito, who was extremely unwilling, played a trick with Cheng Gong this time.

The Japanese Navy will go around your Royal Navy in the South China Sea, but in the waters near Tokyo Bay, the Japanese Navy will never compromise and retreat.

At a depth of 150 meters, a Japanese Navy's Haida Type 6D submarine (IXI submarine Japanese version) I-78 is sneaking northeast at an economic speed of 8 knots.

Dinner on the submarine was not plentiful, there were few fresh vegetables, but meat was everything. It's just that few submariners like to eat meat.

As an excellent submariner with six years of military experience, Koji Kitajima has never been a picky eater. It's good to have food on the submarine, and I don't care what to eat at all.

While eating rice balls in the sonar listening position, I listened attentively to the movements inside the sonar. Koji Kitajima seems to be extremely dedicated, and he has not forgotten his job even when he is eating.

Since joining the I-75 Haida Type 6D submarine, Koji Kitajima quickly fell in love with what is said to be the most advanced submarine in the world today. After being familiar with the various cabins and equipment in the submarine, Koji Kitajima already loves this Yi 78 more than his wife.

It's just that I recently heard that the Royal Navy of Donghua has released two more advanced new submarines, but the imperial intelligence department has not had any valuable information about the more advanced Seawolf class except for some information about the Kilo-class.

I just don't know what will happen in the encounter between the Empire's Haida 6D and the Seawolf-class of the Donghua Royal Navy?

Koji Kitajima, who was born belligerent, was full of anticipation at this time. This is because, at 4 o'clock this afternoon, all the officers and men of the Iraq-75 boat received a report from the Admiralty that the 3rd Amphibious Assault Aircraft Carrier Battle Group of the North Pacific Fleet of the Royal Donghua Navy was only 380 nautical miles away from Tokyo Bay. There is intelligence that in this Donghua Royal Navy fleet, there are not only Kilo-class submarines, but also the more mysterious Seawolf-class submarines.

As the best sonar soldier of the I-75 boat, Koji Kitajima heard a relatively vague signal an hour ago. He preliminarily judged that this was most likely a Kilo-class submarine of the Royal Navy. This is because the sound signal is reflected many times on the surface and seafloor, and several times through the thermocline. But this can only roughly determine the direction of the submarine, and cannot calculate the distance.

"Is there anything new?"

Looking at the captain Matsumura Kanji who came over to inquire with a serious expression, Koji Kitajima held the listener that was close to his right ear with his right hand and shook his head gently. He said in a low voice: "Captain, intelligence shows that the Donghua Royal Navy has no less than ten submarines in this amphibious assault aircraft carrier battle group, and we have only found one now. ”

"What? Second Lieutenant Kitajima, what do you mean by that? ”

"Our Haida D-type submarine is actually the XXI type submarine sold to us by Donghua. The Donghua Navy is very knowledgeable about XXI submarines, while we know extremely little about their newly equipped Kilo-class submarines and Seawolf-class submarines. But it is certain that the Kilo-class and Seawolf classes of the Royal Navy of Donghua are more advanced than our Haida D-type submarines. ”

"Of course I know that, I need you to explain what you said earlier!" Kanji Matsumura said in a deep voice that was obviously a little impatient.

Koji Kitajima swallowed hard and said slowly: "I now have a little suspicion that the previous signal may have been deliberately made by the Royal Navy of Donghua for us to hear. Otherwise, it would not have been possible to hear no other signal for so long. ”

Matsumura Kanji asked intently, "How fast can a Kilo-class submarine sail quietly?" ”

Koji Kitajima hesitated, but replied, "It is said that as long as it does not exceed 15 knots, it will be difficult for us to find out." ”

"Are you sure?!" Matsumura's face changed dramatically.

Koji Kitajima nodded and said, "Captain, do you remember that a month ago, in the Sea of Okhotsk, we were doing a low-speed mute effect test, and we accidentally discovered a Kilo-class submarine of the Royal Navy of Donghua.

At that time, the submarine was operating at a speed of 16 knots, and the noise signature received by the active sonar was more pronounced. They had already spotted us, but they still circled around us at a speed of 16 knots in the water before leaving. The signal I heard earlier is very similar to this noise signature. ”

"Yaga!" Matsumura Kanji gritted his teeth and cursed, then regained his composure and said, "Second Lieutenant Kitajima, if your speculation is true, then it is very likely that the previous signal is a decoy to lure us past!" No one knows how many submarines of the Royal Navy of Donghua are waiting for us in the deep sea to the northeast! ”

"Captain, the Royal Navy of Donghua shouldn't attack us, right?" Koji Kitajima suddenly felt nervous for no reason.

"What is under the sea, who dares to guarantee it! But we must be ready to fight at any time! After Matsumura finished speaking, he immediately issued a combat order to all the officers and men of the ship.

In less than three minutes, all 57 officers and men on board the Iraq-75 boat entered combat positions.

At this time, more than 100 nautical miles to the northeast, a Seawolf-class attack nuclear submarine that had burst ahead of the surface ship formation was sailing westward at a speed of 20 knots at a depth of 350 meters.

As the first captain of the SSN-412 "Expeditionary 039" Seawolf-class attack nuclear submarine, Zhou Haisheng took over the submarine a year ago. He was also one of the first sixteen captains of the Royal Donghua Navy to come into contact with the Seawolf-class attack nuclear submarine.

Zhou Haisheng didn't understand what nuclear power was, and he couldn't figure out how the electronic equipment on the boat worked. But he knew that these things were all good things, and they belonged to the top secret of the Donghua Royal Navy, and there was no one!

Forty minutes ago, when the SSN-412 "Expeditionary 039" rose to the depth of the periscope, used communication equipment, and conducted secure communication with the flagship, it learned that the four Kilo-class conventionally powered diesel-electric submarines that were at the forefront of the entire fleet carrying out the forward anti-submarine escort mission were playing a game of hide and seek with the Japanese Navy submarines.

Except for them, the commanders of the Seawolf-class attack nuclear submarines, no one else in this world knows what a "treacherous" super profiteer His Majesty the Great Donghua Empire Emperor Jincheng is.

All the ships sold to Germany and Japan, whether surface ships or submarines, His Majesty Emperor Jincheng entered all the voiceprint characteristics of these ships into the combat command system database of the Seawolf-class attack nuclear submarines in advance.

Through the data link, it can be transmitted at any time to the digital sonar system and the identification of friend or foe system for each Kilo-class conventional-powered diesel-electric submarine in its fleet.

Therefore, for the submarine officers and men of the Royal Navy of Donghua, those XXI submarines sneaking on the bottom of the sea are no different from kilowatt solar lamps. As long as they want, they can find out each other's whereabouts and location at any time.

And as long as they don't want to, it is impossible for the other party to detect their whereabouts at all!

This is the generation gap in technology! This is the biggest advantage that the submarine forces of the Royal Navy of Donghua have!

(To be continued.) )