Inside the headquarters of the 58th Division in Matsuyama. Zhang Lingfu's hands trembled angrily, and he unfolded the note that Lin Xiuxuan left him. He read this note no less than ten times, and each time he wanted to tear it up, but he couldn't help but read it again, the note was not signed, but the note was exactly the same as the letter he wrote to him last time to ask him to retreat to Matsuyama.

It reads: Brother, I made this decision for the national security crisis, although I pretended to be Lin Linqi of the 96th Division, but I was indeed a Chinese soldier. Brother Wangxian thinks that he is sorry for his brother, and don't blame him. At present, although half of the Longling of Songshan is saved, the northern Tengyue natural danger is still stolen by the Japanese invaders, and the Wangxian brother earnestly sticks to the natural danger here. As long as this natural risk is relied upon, even if the Japanese invaders occupy the entire territory of Burma for a short time, they cannot take care of each other, and they can collapse within a year or two. There is another thing that needs to be instructed to the virtuous brother, although the main point of Songshan's defense is a high mountain, but Mangshi is flat, which is convenient for airdrop, which is the key, do not be greedy for danger, give up supplies to rush, this matter must not be taken lightly.

"Bastard, a good brother. This Lin Linqi something. ”

This time his anger finally accumulated to the point where he could not be restrained, and he struggled to tear the letter to shreds.

Deputy Division Commander Cai picked up a piece of Lin Linqi's letter and looked at it for a while.

"It was indeed his notes. You can keep it and transfer it to the military commander in the future as evidence. ”

"What is the transfer? It's not shameful enough for us. Quickly burn it, not a single one is left, and the radio station stops all verification telegrams. It's the second time I've been deceived like this in my life. If you catch him, you will not spare him. He pulled out Lin Linqi's pistol and slapped it on the map table. confiscated that day, in fact, he took a fancy to the American pilot's Browning small and good-looking, and wanted to keep it for himself, but he didn't expect the fake Lin Linqi's counterattack to be so fierce.

Deputy Division Commander Cai beckoned the orderly to sweep up the shredded letter paper and burn it.

"Deputy Guo Tuan." He let out a loud shout.

"Yes!"

"You take someone down the mountain immediately......"

"Go arrest Lin Linqi?"

"it, he can write this kind of letter and still let me catch it? Go to Mangshi to strengthen the deployment, Tengyue This fierce enemy really needs to be strictly guarded. ”

On the eastern side of the Solomon Sea, the aircraft carrier Wyvern continued eastward at high speed, preparing to join the battlefield that was about to begin. Yamaguchi didn't even let the radio silence break, just left a destroyer to continue searching for the overboard crew. After the Soryu sank, when the reconnaissance planes taking off from several Myoko flew over the clouds, they spotted the American task force below, and the pilots saw that there was at least one aircraft carrier in it, and Yamaguchi was unwilling to give up the advantage of turning defeat into victory, and decided to continue the original battle plan formulated by Yamamoto to find and destroy the American fleet. Like most Japanese soldiers, after suffering a huge setback, he was not thinking about stopping the loss in time, but how to turn the book, and naturally, he continued to advance towards the area where the 5 air battle was located.

This act of audacity did not surprise 419, and 419 made two predictions before launching the attack. If the remaining aircraft carrier returns, it can be judged that it is the Feilong that has been sunk by the flagship of the Second Air Battle, and if it does not retreat and advance, it can be judged that it is the Canglong that has been sunk. This is a prediction of Yamaguchi's character and extreme behavior in the history of the war.

419 continues to track the aircraft carrier, but it is about to face a big melee between the two sides, and Cheng Dayang's colleagues need to track the intelligence of the surrounding tens of thousands of square kilometers of inland fleets. Judging from various indications, the three US aircraft carriers are being assembled, while the four Japanese aircraft carriers are relatively scattered, and the light aircraft carrier Xiangfeng is coming from the east coast of Melbourne, but it may not be able to catch up with this battle. Faced with such a complicated situation, he must risk stretching out the antenna to collect the opponent's electronic signals to determine the battle plan of the two sides, but then it is impossible to dive too deep.

The modified seaplanes that had taken off from Bougainville were flying rapidly towards the Japanese fleet, and even though the Japanese units scattered throughout the predetermined battlefield had to maintain radio silence, they also smelled the smell of war, and there was no doubt that a naval battle would take place in a day or two. A total of four planes will take off in turn, each carrying a magnetic sounding system and one*.

With such a weak air force, the chances of finding an underwater target through a passive magnetic detector in the ocean were slim, but Makino had a guess that if the kind of target he expected was real, it would probably be lured to the vicinity of the Japanese fleet during the war. After he learned that the aircraft carrier Canglong had sunk, this conjecture deepened even more.

The rescue destroyer left behind in the Second Voyage sent a contract to Rabaul six hours after leaving the team, reporting the strange incident of the sinking of Canglong and the rescue of only 13 people. This, of course, heightened the suspicions of the naval officers in Rabaul, and the officers around Yamamoto were divided into two factions, some suggesting that the plan should be abandoned, while many more advocated continuing the plan. Behind the scenes, Makino was even more convinced of his own judgment, although there was no valuable information in front of him, so he could only wait for the crew of the Sunken Soryu to be sent back by the destroyer.

Takeo Yamazaki, the pilot of the plane, flew to his own fleet in the distance, preparing to search back and forth in the rear of the fleet. All the pilots trained were told that this was the latest anti-submarine technology imported from Germany, and that the key to using it was to reduce altitude as much as possible. After hearing the audio signal, the listener must communicate with the pilot in the cockpit and make a suggested course according to his independent judgment, try to keep the audio signal stable for tracking, at the appropriate moment, turn on the power of the mysterious weapon, and decisively throw * down after the licensed audio that can be dropped appears.

No one can figure out what the theory behind this simple manual is. If the magnetic detection could still deduce the general principle, the small* that needed to be powered up in the weapons bay was so unbelievable that they had never seen a weapon that needed to be powered up before it could be thrown.

Yamazaki carefully controlled the plane and flew against the waves, flying like this was a joke with the lives of all the people on board, especially on such a gloomy morning, the line between the sea and the sky was very blurred, and the time was long, and it was easy to hit the sea surface deviation. However, his headphones are constantly filled with reflected audio from the sea, and he has been able to adjust the altitude by relying on the frequency of each pulse after many days of contact. This thing was Makino's first invention to reach this plane, and it seems to be very useful for keeping flying at low altitudes, and now, most pilots use it during the day to bridge the sensory gap.

The listener in the aft compartment waited carefully for the reaction in the headset, and his experience after using this device for a short time told him that if there was something the size of a submarine hidden under the surface of the sea over which the plane flew, the audio would sound at most ten times, which would not be enough to complete the action of powering up the bomb, so it was necessary to coordinate the pilot in the forward cabin, go back and search in a circular course a few more times, roughly determine its whereabouts, and then maintain a stable tracking, and only at the third or fourth contact could it be possible to drop the *.

419 tracked the Wyvern and its formation at 20 knots, and the Wyvern had already crossed 419, which made 419 somewhat behind. No, the ocean is not in a hurry. His reactor had been running in for a while, and it seemed certain that he could increase the speed to more than 25 knots, but he knew that the Japanese fleet would not always maintain high speed, so he was not in a hurry to speed up to catch up.

The listening department suddenly receives a strange audio signal, repeated at a frequency of one hertz, using ultrasound waves of a shorter wavelength, this mechanical wave has a weak ability to penetrate seawater, and the sound source is obviously not too far away.

"Report, strange duplicate audio ...... found" listener report.

"Oh? What are the characteristics? Cheng Dayang asked with his hands crossed.

"There are no typical features, some like bathymetric sonar, but the pulse intervals are too long to map the seafloor."

"What? Bathymetry sonar, how can there be such equipment in this era? ”

"Yes, it's strange, the sound direction was initially at 140, then moved to 175, the distance is unknown, and it continues to move, and within 1 minute, it has moved more than 30 degrees on the starboard side."

Everyone in the command cabin was a little hesitant, and Cheng Dayang looked at everyone's faces and knew that they were all confused like himself. Finally, his gaze fell on Shu Ping.

"What do you think?"

"I don't know, but since it's passing in front of you, it's better to stay away than to get too close to something like that."

"Don't have a clear conclusion?"

"Nope."

Cheng Dayang hesitated for a few seconds, he knew that Shu Ping would not come to a conclusion easily.

"Turn 40 ° to the left, the ballast water tank is flooded, 30 ° inclination, dive to 150."

Although he vaguely felt that the problem was not big, it must be some unknown backward equipment in this era at work, but Shu Ping opened his mouth, which meant that he could not take it lightly.

On board the Japanese plane, the listeners heard two audio signals in a row, and then they were gone. He immediately advised the pilot to turn and start making a circle, which the pilot did, and the height was reduced to 50 meters.

Flying in a circle is also a strategy originally conceived by Makino, and when the direction cannot be confirmed by magnetic detection, flying in a circle can be crossed to roughly confirm the direction and destination of the target. Then there is more targeted tracking, but Makino seems to be a little rough when designing the ultrasonic altimeter, and he did not think about the possibility of being detected by the target, perhaps because he did not know enough about the monitoring spectrum of the submarine sonar system.

The Japanese plane circled several times and did not hear the audio again, which really surprised the Japanese pilot, who was sure that there were no nearby ships that might interfere.

In central Burma, Chu Dinh Chang's position was being put to the test, and this time it was no longer the time to take advantage of it, and a whole wing of Japanese troops began to attack his position. Japanese planes arrived late, but there were not many of them. They tilted most of the ammunition near the positions of the Chinese expeditionary forces, and then began to search for rear artillery units. However, Brooke has already dispersed and hidden the artillery well, and he has always wanted to gain military power, so that he can show his professional skills in front of the wild man of Captain Chu. Using the complete sand table left by the British, he studied the concealment that could be used on the surface, and found several suitable artillery positions where the cannon and tractor could be hidden in the tunnel.

As soon as the Japanese planes left, he dragged the artillery out again and attacked the enemy at the front. The Monywa mining area was literally a funnel-shaped terrain, and if the Japanese broke through in the middle, they could only make a surprise attack here, and there was almost no place to detour, but they were blocked by a morale-high force of 1,500 men.

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It's too tiring to update on a business trip, it's all typos, it's not good, it's about two days a change, and it's stable after ten days.