Chapter 651 Fish Fish Torpedo!
The 8-knot speed of the Great Wall boat is the maximum underwater speed that can be achieved while ensuring sufficient concealment. This boat belongs to Type 041, which is the most advanced model in the Yuan-class (outside ship-class code) series and has been in service for only three years. Because it uses an AIP power system, it can sail underwater for a long time.
Traditional conventionally powered submarines are powered by battery power when sailing underwater, so they need to float up from time to time to activate internal combustion engines such as diesel engines to charge the batteries. This method seriously affects the submarine's advantage of strong concealment.
The emergence of AIP is to solve this problem. It is an "air-independent propulsion device" that allows the submarine to sail underwater for a long time without the need to float for charging or to obtain air. The speed of 8 knots is also the maximum speed that the Great Wall boat can reach while ensuring that the battery pack is fully charged.
If the power of the battery is not considered, the Great Wall boat can reach a maximum speed of 20 knots underwater.
The mysterious "partner" was also sailing in the same direction at the same speed, parallel to the Great Wall boat, and the distance was only 8 nautical miles. The noise level of the Great Wall boat was very powerful. Tu Meiri was sure that the other party did not notice him. However, the other party made a communication three hours ago, so Tu Meiri knew that there was such a submarine around him whose performance was not inferior to our own.
What is certain is that if the Great Wall boat takes the initiative to communicate with the shore, its whereabouts will definitely be exposed. Therefore, after receiving the previous order, Tu Meiri had made up his mind not to respond in any communication.
But what was before him now was a very difficult multiple-choice question.
The atmosphere in the combat command center under the submarine's hull was solemn, and almost no sound could be heard. The submariners' shoes are even specially made so they don't make any sound when walking around. Most of the facilities, equipment, pipes and lines in the boat are not covered in a regular manner, firstly to avoid internal sound resonance, and secondly to facilitate emergency repairs. Therefore, the interior of the submarine looks messy and messy, not as neat as the interior of a surface ship.
The sonar room is keeping track of the unknown submarine, and the torpedo department is in combat mode and can launch an attack at any time. There is no doubt that the Great Wall boat is in an advantageous position.
But Tu Meiri needs to make a decision soon.
"Operation Saitai Justice, the purpose of the operation is to capture Tojo Ikki, the important leader of the Saitai Pirates. This man is the strategist of the Saitai Pirates. Catching him is equivalent to breaking the brains of the Saitai Pirates. The superiors are determined to win."
Tu Meiri leaned over and looked at the chart and said in a deep voice, "The front finger requires us to provide support and cover for the capture operation force at any time. The capture operation force arrived at Bawang Islands at 20:30, and planned to end the mission at 23:30. It is now 19:45, and the previous command requires us to ensure the smooth evacuation of the arresting operation troops. We cannot reach the designated sea area before then by maintaining the current speed."
8 knots is equal to 8 nautical miles. Although the front finger knows that the submarine is special and does not specify an arrival time, at the current speed it is impossible to arrive before the capture action force completes its mission. There is no way to cover the evacuation, let alone Support provided.
The class submarine to which the Great Wall boat belongs can launch submarine-launched missiles through torpedo tubes and can attack surface and land targets. However, the Great Wall boat commanded by Tu Meiri only carried 20 533 mm caliber torpedoes. Therefore, Tu Meiri analyzed that the purpose of the former designation is to allow the Great Wall boat to intercept the enemy's surface and underwater targets, support the capture of operational troops, or cover their evacuation.
Huang Jinhua looked at the hand-drawn situation map and remained silent. The unknown submarine is 8 nautical miles to starboard and its course is the same as our own. It is not difficult to determine the purpose of the unknown submarine. He had a clear suggestion in his mind, but he had not yet decided whether to formally put it forward.
Vice Captain Xie Huarong has limited experience. Under such circumstances, he basically dare not make combat suggestions. He is still in the learning stage.
But Tu Meiri wanted to test him and asked, "Xie Huarong, please tell me your opinion. What should our boat do?"
Xie Huarong said thoughtfully, "I think we should implement the order of the previous commander and immediately increase the speed and rush to the designated sea area within the designated time."
"Where is the unidentified submarine on the starboard side?" Tu Meiri asked.
Xie Huarong said, "No matter what they do, they will never take the initiative to attack our boat."
Tu Meiri and Huang Jinhua looked at each other and smiled. Tu Meiri said, "Old Huang, do you have any other suggestions?"
Huang Jinhua said with a smile, "My tendency should be consistent with yours, captain."
Tu Meiri nodded slightly and said, "I'll discuss it with the political commissar."
He turned and walked towards the living quarters. He and the political commissar took turns on duty, ensuring that there was a capable commander in the command cabin at all times.
Xie Huarong glanced at Tu Meiri's back and asked Huang Jinhua in a low voice, "Squad leader Jinhua, captain, what do you mean by this? Are you going to do something?"
"Of course we will not fire the first shot, but if it is confirmed that the unknown submarine belongs to the West Pacific pirates, then we will have sufficient reason to fire first." Huang Jinhua said seriously, and then turned to the sonar room. .
The sonar director and three sonar crews were keeping vigilant about the surrounding situation, and tracking the unidentified submarine on the starboard side was the most important task. At this time, the sonar director was working intensively to identify the characteristics of the unknown submarine to determine its type.
Because the other party did not detect the Great Wall boat, the Great Wall boat obviously did not use active sonar. Instead, it activated passive sonar and tracked it through the noise emitted by the target. However, if you want to carry out an attack, you must use active sonar, which is usually called attack sonar.
Sonar can be regarded as underwater radar, except that it emits sound waves instead of radio signals. The sound waves are reflected back when they hit the target, and are accepted by the signal receiving and processing device. In this process, underwater detection is completed.
The working mode is divided into active and passive. You can also refer to the working mode of radar. Active radar emits signals, making it impossible to hide them, while passive radar only receives signals but does not emit them, making it very concealable. The same is true for sonar, but passive sonar has a limited detection range and is closely related to the noise level of the target.
This is also because the distance is only 8 nautical miles. If it is further away, the Great Wall boat may not be able to use passive sonar for tracking.
The sonar system of the Great Wall boat is very complete, including side array sonar, bow sonar, and towed line array sonar, with multiple functions and multiple working methods.
The sonar room made great contributions to the discovery of the unidentified submarine. The signal is very weak. It is hidden in the clutter on the seabed and will be ignored if you are not careful. Even if many people hear it, they will mistakenly think it is a large fish or something.
The person on duty at that time was the veteran sonar officer First Class Sergeant Li Xinnian who was sitting in the middle. He keenly discovered the suspicious signal from a large amount of clutter, and immediately took measures to amplify and listen. As a result, he discovered surprisingly It was actually the sound of a propeller!
At that time, this discovery made Tu Meiri break into a cold sweat.
Li Xinnian quickly determined that it was a submarine and not a surface ship, but he had not yet determined the model of the submarine. It is certain that it is not our own submarine. Every submarine that goes to sea will receive intelligence reports from the shore headquarters from time to time, including the areas where friendly forces are active.
There is only one boat like Tu Meiri in the waters here.
"Old Li, are you on the right number?" Huang Jinhua asked Li Xinnian in a low voice.
Li Xinnian shook his head slightly, "I have compared it three times and cannot find a model that matches the noise characteristics."
"I just thought of a boat that is not in the catalog. You can judge it." Huang Jinhua took the pen in Li Xinnian's hand and wrote two words in a flash.
Canglong.
Li Xinnian was stunned for a moment, then shook his head, "Without information about this boat, there is no way to be sure."
"Through elimination, if the others don't match up, then you can be sure that it is the Canglong." Huang Jinhua said with a smile.
Li Xinnian was about to say, isn't this nonsense, but suddenly found that Huang Jinhua's smile was somewhat meaningful, he was slightly stunned, then raised his brows, nodded slightly and said, "Well, that's a good idea. Now it's basically certain that it is The latest submarine purchased by the West Pacific Pirates is the Soryu."
"To be cautious, please check again." Huang Jinhua said.
"Yes." Li Xinnian quickly checked and confirmed that it was not any submarine in the catalog. He wrote the conclusion in the report that "the Canglong is suspected to be the latest purchase of the West Pacific pirates."
This is what Huang Jinhua wants. He takes it in his hand and quickly returns to the command cabin. Tu Meiri was already there, and it was obvious that his discussion with the political commissar had come to fruition.
Li Xinnian and Huang Jinhua's judgment was very correct. The unknown submarine was the Canglong conventional submarine newly purchased by the West Pacific Pirates. It was the most advanced submarine in the West Pacific Pirates' underwater equipment, with an underwater displacement of 4,200 tons. The Great Wall boat is a bit bigger and smaller.
"Old Huang, how is the situation?" Tu Meiri asked quickly.
Huang Jinhua handed over the report in his hand, "We have the results, which are consistent with our guess. This Canglong is a great threat to our fleet, and I recommend taking decisive measures."
"Based on its course, it must be to support their main fleet. Taking decisive action to destroy it is in line with our combat principles." Tu Meiri said.
Xie Huarong understood the idea and said, "I agree that taking decisive measures while we are in a superior position is the best choice. After solving this threat, we can concentrate on carrying out the tasks of the front finger, and even take the initiative to contact the front finger to fully communicate Battle plan.”
Tu Meiri glanced at it and said, "Since we have unified opinions, let's do this."
His face suddenly solidified, and he said in a deep voice, "Battle alert!"
"Battle alert!"
"Battle alert!!"
"F-Fight Alert!!!"
The whole boat took action quickly, and the torpedo room on standby was ready for launch.
Tu Meiri ordered: "Slow down for five knots!"
"Slow down five knots!" Huang Jinhua repeated the command.
Tu Meiri continued to order: "Turn thirty degrees to the right!"
"Turn right thirty degrees!"
The speed of the Great Wall boat slowed down, and the bow of the boat slowly turned to the right, pointing to the course of the Canglong. The Canglong is still unconscious. Objectively speaking, the noise level of this boat is relatively powerful, better than that of the Great Wall boat. In other aspects, it is also at the world's advanced level, and its overall performance is higher than that of the Great Wall boat.
The problem is that the quality of the personnel operating this boat is unsatisfactory. Their technical level is not bad, but their awareness is not strong. Otherwise, with the noise level of the Canglong, it would be difficult for the Great Wall boat to detect it. Tu Meiri is very experienced. He has traveled many places since he joined the army, and the string has always been tight. Even concealment is the life of a submarine, so he has a very strong awareness in this regard.
Huang Jinhua looked at the estimated route displayed on the tactical display. When the route intersected with the target boat's route, he reported, "Captain, the steering is completed."
Two submarines 8 nautical miles apart sailed in parallel and in the same direction. The Great Wall boat slowed down and turned 30 degrees to the right. The Canglong continued to sail forward at a speed of 8 knots without realizing it, and then entered the attack range of the Great Wall boat.
Tu Meiri looked at his watch and quickly calculated the distance and time in his mind.
The command cabin was so quiet that only the controlled breathing of everyone could be heard, and the eyes of several staff officers were focused on Tu Meiri.
Tu Meiri made up her mind and said, "Thunder No. 1 and Thunder No. 2 are ready!"
The torpedo room acted quickly, and the fire control post in the command module locked the target and reported: "Target locked!"
"Torpedo room received visual indication!" the torpedo room reported.
Tu Meiri gritted his teeth and said, "Open the launch tube!"
Huang Jinhua pressed the button hard, and the caps of tubes No. 1 and 2 were opened.
At this time, the Canglong had already noticed something unusual, first the sound of the attack sonar hitting the boat, and then the sound of the Great Wall boat's torpedo tube cover opening. Any qualified sonar operator would be able to pick up these two unique sounds and quickly identify an attack.
However, they have no chance.
Tu Meiri roared and gave the order: "Two rounds in a row! Prepare No. 3 and No. 4 mines!"
"Two rounds in a row! Prepare No. 3 and No. 4 mines!" Huang Jinhua repeated the command loudly.
Two 533 mm caliber Yu-6 heavy-duty anti-submarine torpedoes were pushed out of the launch tube, and then the engine ignited to push the torpedoes toward the target, quickly accelerating to 65 knots. By this time, even if the Canglong could fly, it would not be able to escape such pursuit.
The Yu-6 heavy-duty anti-submarine torpedo has very advanced performance. Since it was put into service in 2005, it has become the main anti-submarine torpedo of the People's Navy and is equipped on surface ships and submarines. This torpedo is the first torpedo designed by our military to adopt modular design and open software architecture.
The highlight of this type of torpedo is that the guidance system it adopts is very advanced, and the guidance system can be flexibly selected according to needs. It can adopt various guidance methods such as wire guidance, active sonar guidance, and stern flow guidance.
Among them, the stern guidance method is relatively advanced. When a ship's wake is detected and passed through, the rudder will be turned to a certain angle so that the torpedo head faces the ship. This homing method can make the torpedo shuttle left and right like a snake to pursue the ship. .
(The stern flow guidance method is wake self-steering)
In order to be sure, Tu Meiri sent out a batch of two torpedoes and immediately prepared the second batch of two torpedoes. For the second batch of two torpedoes, he used a wire guidance mode, which could guide the torpedoes to attack by sending instructions.
Although a Yu-6 heavy-duty anti-submarine torpedo can send the more than 4,000-ton Soryu to the bottom of the sea.