During the mission, the submarine suddenly encountered an "underwater cliff" and rapidly "fell deep." At the critical moment, the officers and soldiers performed extreme operations for 180 seconds, successfully rescuing themselves and creating a miracle in the history of submarines. Why were they able to successfully escape? 180 seconds of emergency self rescue and rescue, creating a miracle in the history of submarines. During the Spring Festival of 2014, the Navy's 372 submarine was ordered to carry out a cruise mission and suddenly encountered an "underwater cliff". Rapid "falling" and "falling" refer to the phenomenon where the depth of the submarine increases sharply during navigation. When the submarine travels from a high-density layer to a low-density layer, it will sink instantly due to reduced buoyancy and sink to a certain depth. When it sinks to a certain depth, it will be instantly crushed by huge water pressure. At a critical moment, the 372 submarine officers and soldiers only used 180 seconds to close nearly a hundred valves in the almost zero visibility mist, operate dozens of instruments, and become the only submarine in the world that can successfully self rescue and escape from the "underwater cliff". This created a submarine in the history of submarines in the world. In 2016, the Navy's 372 submarine was awarded the honorary title of "Model Boat for Practicing Strong Military Goals". "On the submarine, if you can fight for an extra second, you will have an extra 10 or 100 points of hope." Chen Zujun was called one of the "Five Cabins and Three Braves" by his comrades. In the 372 submarine, he encountered a "deep dive" The critical moment of pipeline damage and water ingress was when he and his two comrades completed the shutdown of the main motor and the sealing and sealing of the fifth compartment, which meant he couldn't go out. However, Chen Zujun said, "Even if all three of us sacrificed ourselves, it's okay. It really doesn't matter. With the correct operation and handling of the commander, the submarine has the ability to float up. Other people can survive." According to Chen Zujun's recollection, "At that time, the equipment couldn't see anything but a mist of water." The reason why he was able to accurately find the position and operate dozens of valves in a cabin with limited space and almost zero visibility was due to solid training and tacit cooperation in each combat position. "" On a submarine, if you can fight for an extra 1 second, you'll have 10 or 100 more chances of survival, "Chen Zujun said." We usually train in very dim conditions without lights, so even if we cover our eyes, we can find equipment in the submarine. "Facing fear and overcoming it is the only way for them to grow. Torpedo launch tube escape training is called the" most terrifying training "by soldiers." Soldiers wear oxygen masks and enter the torpedo launch tube, almost completely black. With the addition of water and pressure, people's sense of fear doubles. The way to overcome fear is to face fear directly. Through repeated training, they have developed strong professional skills and psychological qualities, so that they can face danger and remain calm in the moment of life and death. Submarine soldiers are one of the most difficult and dangerous branches of the military. From the formation of the first submarine unit in the 1950s to the early 1970s, China's independently developed first conventional submarine and nuclear submarine have been launched for generations. Submarine officers and soldiers have been unknown, working hard, and relying on their excellent professional qualities and profound beliefs to face danger, they have achieved one after another. Crossing over and Guarding the Motherland's Deep Blue (Le Xin She)