Hoshino Yasuwa and Koyama Ishiji are on the I-17 submarine, which is also the latest submarine of the Japanese army, and the submarine is equipped with a high-power communication system, which can allow the submarine to communicate when it is on the water, and at three o'clock in the morning on March 5, Hoshino Yasuwa picked up the communicator and said: "Attention all submarines, it is now three o'clock in the morning on March 5, and there are still three hours before sunrise. ”

Hoshino Yasu and Chiro said that their submarines were no match for the surface ships of Lin Yuan's forces in terms of speed and armament, and their only chance of winning was concealment, so they had to charge their batteries in the dark and then enter a submersible state during the day, so as not to be discovered by the surface ships of Lin Yuan's forces.

At five o'clock in the morning of 5 March, when the sky was still in pre-dawn darkness, the submarines reported separately: "The I-5 is ready, the I-6 is ready......

When Hoshino heard that all the submarines were ready, he ordered, "All submarines dive and head for the predetermined sea area." After Hoshino Yasuwa finished speaking, he turned off the communicator, because after entering the water, the electromagnetic wave will be difficult to move an inch, so underwater communication will also become extremely difficult, so it is difficult to continue to command after the submarine enters the water, and each submarine will fall into a situation of fighting alone.

However, Hoshino Yasuwa has already formulated an action plan for the submarine team, and it is good for each ship to implement the action plan, so Hoshino Yasuwa began to concentrate on commanding the I-17 submarine, he picked up the microphone of the communication system in the boat, and said loudly: "The main ballast water tank is filled with water, the rudder is deflected, and it dives to a depth of 80 meters." ”

The main ballast water tank is used to control the lifting of the submarine, when the submarine wants to dive, open the valve, let the seawater pour into the water tank, the submarine's own gravity increases, so it will dive, when the submarine wants to float, it will inject air into the ballast water tank, press the water out, the gravity of the submarine itself will decrease, so it will float.

If the submarine only relies on the water in the water tank to change gravity to complete the ascent and dive, the hull will be difficult to stabilize, so it is necessary to use the elevator to stabilize the hull, the elevator is usually arranged close to the bow or stern, the Japanese submarine is equipped with elevators in the bow and stern, the operator heard Hoshino Yasuzu's order and began to adjust the angle of the rudder, slowly let the submarine sink.

Hoshino Yasuwa saw the pointer on the depth gauge stop at "eighty", turned to Koyama Ishiji and said, "Koyama-kun, can we look for the liquid seabed?" ”

Xiaoshan Ishiji said, "That's right, you can look for it now." After saying that, he called the navigator over, and the navigator put the chart in front of the hill rock, put the tip of a pencil on the map, and said, "Look, this is the position of our Yi XVII." ”

Xiao Shan Shiji said: "If you go down about ten meters or so, you should be at the bottom of the liquid sea, we should try." ”

Hoshino Yasuwa then ordered: "Adjust the main ballast water tank and descend another ten meters!" The operator in the command room immediately turned the handle and began to adjust the ballast water tank and elevator, and the submarine continued to dive underneath the rock, in the process, Xiaoshan Shiji's eyes were always staring at the density table on the side, and when diving at a depth of ninety meters, the density meter suddenly turned a big angle to the mountain, and Xiaoshan Shiji's eyes suddenly lit up, and said: "It's here!" We've reached the bottom of the liquid sea! ”

Hoshino Yasuwa then ordered: "Reduce the engine power to five percent, and wait for the arrival of Lin Yuan's warship!" According to the original plan of the Japanese army, after the submarine team arrived at the sea area of the liquid seabed, the Yi-5 submarine would sail north and enter the navigation area of the transport ship of Lin Yuan's troops.

The captain of the I-5 boat is named Ichiro Abe, and he is also a fanatical supporter of the Japanese emperor, in the submarine force, his fanaticism is second only to Hoshino Yasuwa, otherwise he would not have come to take on such a dangerous mission, at this moment, he is standing in the command room, his eyes are staring at the sonar soldier on the side.

At 8 o'clock in the morning of March 5, the sonar soldier reported to Ichiro Abe: "A sound signal has been found in the northeast direction of our ship." ”

Ichiro Abe immediately asked, "What ship sent that signal?" ”

The sonar soldier said, "It should be a medium-sized transport ship." ”

In the early days of submarines, judging the type of target from the sound depended entirely on the experience and feeling of the operator, so the sonar soldier would unconditionally believe the captain after saying his judgment, so Ichiro Abe said: "Adjust the rudder and turn to the northeast." ”

The operator immediately adjusted the rudder and pointed the bow of the boat in the northeast direction, so that the sound received by the sonar was even louder, and the sonar soldier immediately said: "Report to the captain, determine that the target is a medium-sized transport ship with a displacement of 5,000 tons, at an azimuth of 27 degrees, about 1,200 meters away from our boat, and the course is from east to west. ”

Abe Ichiro felt a burst of excitement in his heart, and thought, "Since there is a transport ship, let's sink it first!" Ichiro Abe then ordered: "Rise to periscope level, inflate the torpedo tube in the bow torpedo compartment, and be ready for launch at all times." "In submarines, although sonar can hear the sound of the target and can distinguish the location of the target according to the sound of the target, it cannot hear the name and nationality of the target from the sound, so before the attack is launched, the periscope must be raised to visually observe the target and identify the target's attributes.

The first mate turned on the ballast water tank air pump, the air pump pushed the air into the ballast water tank, and the water inside was discharged, the elevator deflected downward, and the water pressure pushed the submarine upward, and the submarine slowly rose, and the periscope height of the Japanese submarine was ten meters, so the submarine slowly rose to a depth of ten meters.

As soon as Ichiro Abe pressed the lifting switch of the periscope, the periscope rose straight up, revealing the sea, and in the process, Ichiro Abe kept his eyes on the eyepiece of the periscope, waiting excitedly for the situation on the sea to appear in front of him, and at the same time looking forward to it in his heart: "The best thing to appear in front of me is a warship!" ”

Soon the scene on the sea appeared in the periscope, on the clear blue sea, a big ship was moving, the big ship was wide, full of square containers, it was obviously a container cargo ship, at the highest point of the ship, a five-star red flag symbolizing the People's Republic of China was hunting and flying in the sea breeze.

And behind this search container ship, there are several container ships that are about the same size, and Ichiro Abe is secretly happy in his heart: "My luck is good, I actually ran into a transport fleet!" Ichiro Abe thought as he turned the periscope, and when he turned fifteen degrees, he was surprised by what he saw.