Fishing nets can be considered a highly efficient invention by humans. Before the invention of fishing nets, humans could only touch fish with their bare hands, smash fish with stones, or insert fish with harpoons. At most, they could only deal with one target at a time, and the probability of hitting the catch was also very low. Later, a fishing hook was invented, but at most one or two can be caught at once. After the invention of fishing nets, hundreds or even thousands of pounds of fish could be caught in one net, and even the shrimp, crab, and turtle inside could not escape. After the invention of strong nylon, even the "absolute H-net" appeared, and even the little loach couldn't run away. Modern fishing nets not only have overall fishing functions, but also include gill nets, drift nets, and entangled nets. Only unexpected, nothing impossible. So far, not only are real fish, turtles, shrimp, and crabs turning pale when it comes to nets, but even black fish of different sizes made of steel or special alloys have to tremble a few times when it comes to the various nets prepared for them in a certain direction. And with the development of technology, there are not only nets in water, but also various nets in the sky and air, which are no less than nets in water. Accurately net various sizes of black fish.

    Not just waiting for these big black fish to enter the designated fishing area before starting; Doing so is already too late and will lose the strategic advantage. Hanhai Langshan (Xiongnu Langshan) believes that although the large black fish of various countries are strong, they can only stay underwater for about 80 days at most. In fact, most large black fish go out to sea and only stay dormant for more than 60 days is enough. Therefore, before and after more than 60 days, any large black fish must float back to the port for rest. And so far globally, there are no more than 200 large black fish still in service on paper, with fewer than 60 actually active. The remaining 140 or more have been soaking in water at ports and docks for an average of 7 to 8 years without ever going out to sea. For the big black fish, which no longer started piling for seven or eight years, the possibility of re deploying to the sea is already less than one in ten thousand. Therefore, currently there are only about 60 global black fish that truly require 24-hour monitoring. In the past, optical imaging satellites could patrol and monitor key docks several times a day. Now, besides monitoring the dock through optical satellites. In addition, the new ocean imaging satellite can also monitor the dock and sea surface on a large scale 24/7 at the same time.

    The most powerful ocean monitoring satellite can even detect navigation objects at a certain depth below the water surface. Therefore, those black fish of all sizes who do not have caves, caves, and docks, think they will dive when they leave the port, and are secretly unaware of it. In fact, most of them cannot escape the eyes of the space-based system. The real cave docks are only available in two major countries, with the West consistently supporting them, and almost all large black fish are parked outdoors. The space-based system only sometimes pretends not to see them and only waits for them to enter the designated "fishing" area before releasing them from the net. This is what is called setting off long lines and fishing for big fish. The problem in the sky has been solved, and the rest is the problem in the sea. To achieve efficient underwater navigation and combat worldwide, it is necessary to first have the most accurate and complete global electronic chart. Not only do we know where the water is deep and shallow, but we also know where there are reefs and thermocline layers. It can be said that there are no details, and it is necessary to have a thorough understanding of every square kilometer of the global ocean. As early as 16 years ago, the San Francisco collision with the seamount incident had already shown who owns the world's most accurate underwater electronic chart. And 16 years later, who will update the latest underwater data the fastest and most accurately? Of course, there's no need to say much. These types of supercomputers are complex systems that require decades of underwater investigation data accumulation to obtain. If some big black fish use two knives in this regard, the ultimate result is to fall into the trap.