Open an aircraft carrier to fight against Japan

When a warship performs anti-submarine missions, it can take off one helicopter or two. If it is just to find a submarine, then it is enough to take off one helicopter. But if you want to find and sink a submarine, you must take off two helicopters. There are even more helicopters, one of which carries submarine detection equipment such as dipping sonar and sonobuoy, and the other carries torpedoes, depth charges and other weapons for attacking submarines, because submarine detection equipment will occupy valuable external storage points of helicopters and has no place to mount the weapon.

So the helicopters of Qinglong Ship and Baihu Ship took off. The carrier aircraft of Qinglong Ship carried six sonar buoys and a hanging sonar, and the carrier aircraft of White Tiger Ship carried four anti-submarine missiles. The two helicopters formed a temporary anti-submarine unit. Xu Xin, the captain and pilot of the Qinglong ship's helicopter, will serve as the captain.The two helicopters flew for a while and were [-] kilometers away from the battleship. At this moment, Xu Xin spoke to the battleship: "Please report the sea situation immediately."

The warship meteorological department replied: "The sea state is level two, and the wave height is [-] meters."

Xu Xin looked at Liu Heng, the sonar operator beside him, and said, "The sea state is level two, and the wave height is [-] meters. What is the distance in meters that our sonar buoys can detect the enemy submarine?"

Liu Heng said: "This area is shallow sea, and the submarine can be detected by using the sound waves reflected from the seabed. down to about 65 kilometers."

Xu Xin said: "Then what kind of sonar buoy deployment method should we adopt?"

Liu Heng said: "Our combat mission is to monitor enemy submarines, so we can arrange the sonar buoys in a straight line. According to the distance of the sonar buoys, we can set the interval of the sonar buoys at [-] kilometers, and the Kitakyushu military port can go to sea. The width is only a little over forty kilometers, and we can monitor the entire Kitakyushu military port with three sonar buoys."

Xu Xin said: "Three sonar buoys are spaced 60 kilometers apart, so we will have to fly more than [-] kilometers. Fortunately, we installed additional fuel tanks when we took off, which greatly increased the time spent in the air. Otherwise, we would not have discovered the Japanese submarine. It just fell."

Liu Heng said on the side: "In fact, the most effective anti-submarine equipment is the long-endurance fixed-wing anti-submarine aircraft, but we still have too few anti-submarine aircraft..." Liu Heng turned on the power of the sonar buoy transmitter while talking, Xu Xin At this time, the helicopter descended to the standard release altitude of 200 meters, and controlled the flight speed, and then said to Liu Heng: "The carrier aircraft is adjusted, and the sonar buoy can be launched."

Liu Heng immediately pressed the launch button, and a sonar buoy flew out of the helicopter and fell into the sea. This type of sonar buoy has the simplest structure and the cheapest cost. There is not even a water entry buffer device on the sonar buoy. After being smashed into the water, under the huge collision force on the water surface, the shell of the sonar buoy opened, and the sound detection array dived to a depth of 30 meters underwater, while the radio device was still floating on the water surface, detecting the sound detection array. sound signal to the helicopter.

Liu Heng looked at the bright yellow buoy on the sea surface, then looked at the signal on the receiving screen, and said to Xu Xin: "The sonar buoy is working normally, and you can go to the next release position and continue to release." So Xu Xin drove the helicopter, down A throwing point flew, and within a short time, all three buoys were thrown into the sea.

At this time, Liu Heng asked: "How much time is left for the plane to stay empty?"

Xu Xin said: "If you fly at an economical speed, you will have an hour and 15 minutes to spare."

Liu Heng said: "Notify Captain Yuan immediately and let him dispatch the helicopter on the landing ship to take over our monitoring." Xu Xin agreed and contacted Yuan Long, who then ordered another carrier-based aircraft to take off.

Twenty or ten minutes later, Liu Heng suddenly saw a bright spot appear on the sonar screen, and then the bright spot flickered continuously. Liu Heng said excitedly, "We seem to have found a Japanese submarine!"

Xu Xin looked at the bright spots on the screen, picked up the communicator and said: "Report to the captain, our unit has found suspicious noise signals, please immediately identify whether the suspicious signals for our unit are friendly targets."

It is a world-class problem to judge the model of the target by the sound signal, which was not solved in Lin Yuan's era, so Xu Xin and Liu Heng didn't know if it was a submarine of their own army after discovering the sound signal, so they could only ask their superiors to help identify it. After receiving the news, Yuan Long said to the staff around him: "Ask the headquarters if there are any submarines in the nearby waters."

The staff officer used the communicator to contact the headquarters, and then said: "There are no submarines of our army in the nearby waters."

After hearing this, Yuan Long thought in his heart: "It seems that our previous efforts were not in vain, those noise signals really attracted the Japanese submarine!" So Yuan Long said: "There are no friendly targets in the nearby sea area, please approach the target immediately and judge the target's attributes. "

Xu Xin immediately drove the helicopter to approach the sea area where the sound signal came from. Liu Heng was also measuring the specific location of the sound signal, but at this moment, the sound signal disappeared from the screen suddenly. Liu Heng couldn't bear to see the signal disappear. Suddenly screaming, Xu Xin hurriedly asked: "What happened?"

Liu Heng said: "The suspicious sound signal is gone."

Xu Xin asked: "Is the reason for the disappearance of the sound signal clear?"

Liu Heng shook his head and said, "I don't know. The propagation of underwater sound is very complicated. It may be that the enemy submarine has changed its navigation status and left the range of sonar, or there may be a problem with the sonar buoy. In short, we cannot determine the cause."

Xu Xin said: "Then all we can do is wait?"

Liu Heng said: "That's right, the only way now is to wait. Maybe the enemy's submarine has entered the sound shadow area. Once the submarine enters the sound shadow area, we will not be able to find it. If we want to rediscover the submarine, we have to wait for it." Get out of the shadow zone."

Xu Xin asked: "Then when will it be able to drive out of the sound and shadow zone?"

Liu Heng said: "The formation mechanism of the sound shadow area is very complicated, and the calculation of the size range is not accurate, so we don't know when it will leave the sound shadow area."

Xu Xin said: "We can't wait like this! Can we think of something?"

Liu Heng thought for a while and said: "We have no good solution, but don't worry, the range of the sound shadow area is generally not large, and the submarine will re-enter the range of the sonar buoy soon."

Xu Xin nodded and drove the helicopter to continue circling in the air. After 15 minutes passed, a bright spot reappeared on the sonar screen. Liu Heng said: "The target has been rediscovered, and the exact position of the target is being calculated now."