Currently, the most commonly used underwater vehicles require remote control by personnel, but there is a type of large-scale autonomous underwater vehicle with higher technical barriers that can complete underwater tasks independently without manual operation after setting navigation and task planning in advance. Recently, Norwegian military enterprise Kongsberg announced that its "Lakefront" underwater autonomous navigation vehicle has completed a record breaking 2222.4 kilometers of autonomous navigation distance during weeks of long endurance testing, and has dived to a depth of 3400 meters for exploration operations. Kongsberg Company stated that the goal of this mission is to test the design and operation of the "Lakefront" autonomous underwater vehicle in a real-world environment, involving complex underwater maneuvers, including a straight-line distance of approximately 111.1 kilometers to 555.6 kilometers, and a total measurement area of approximately 123.4 square kilometers. The error value of its autonomous navigation is very low, accounting for only about 0.02% of the total journey. According to relevant information, the "Hubin" underwater autonomous navigation vehicle is 12.2 meters long, 1.2 meters in diameter, weighs about 8 tons, has a theoretical diving depth of 6000 meters, and a maximum surveying area of about 1100 square kilometers. It can perform autonomous multi role missions for up to 15 days without the support of the mother ship. The "Hubin" is equipped with Kongsberg's "Sunstone" inertial navigation system, which is suitable for unsupervised operation. It is also equipped with the company's communication system, allowing for rapid transmission of large amounts of data when surfacing. After diving for about 10 hours, it will also update initial navigation information from pre deployed responders and begin autonomous navigation. In summary, the design of this underwater unmanned vehicle enables it to perform a wide range of tasks, including remote military reconnaissance, large-scale mine detection, classification and identification, as well as patrolling and listening to submarines at sea fortress locations. In recent years, large-scale autonomous underwater vehicles have been one of the key research and development projects of many advanced countries' navies. These large underwater autonomous vehicles do not require manual control at all times and can accurately use sonar and imaging technology to explore and scan underwater landforms. They can not only be used for scientific research, but also have high military application value. In the future, this' underwater autonomous navigation vehicle 'may be used to perform various military tasks including intelligence reconnaissance, mine countermeasures, underwater operations, and seabed mapping. (New Society)