Basic introduction Chinese name: naval base concept? With ports, berths and airports, the main task is to protect the safety of the sea areas under its jurisdiction. Naval base: the concept and main tasks of China naval command system, and the main naval base in China. The concept includes berthing facilities such as ports, berthing points, airports, sea, land and air defense facilities, protection facilities against nuclear, chemical and biological weapons attacks, communication and observation command institutions, ship repair shops, warehouses and military life service facilities. A military port is also called a naval base. The main task is to maintain the safety of the sea areas under its jurisdiction, ensure the berthing and maneuvering of naval forces in the sea areas under its jurisdiction, and provide operational support, technical support and logistical support for the naval forces berthed in the sea areas under its jurisdiction. The command system of China Navy, the main naval base of China Navy, includes the establishment of naval headquarters-fleet (base)-marine police area-naval detachment (naval base)-naval brigade (decentralized base). In general, naval bases mainly refer to large ports, such as Qingdao Port, Zhoushan Port and Zhanjiang Port where the Fleet Command is located. 1. Huludao: east longitude 120.9 degrees, north latitude 40.7 degrees. Located on the northwest coast of Bohai Sea, the inner port is surrounded by breakwater, the outlet is located on the southeast side, the average water depth in the port is 5-7 meters, and the dock is located on the west side of the port. Outside the breakwater, it is called the outer harbor, with a water depth of 7 ~10m. From the end of February 65438 to the beginning of March the following year, there will be a frozen period in this port. Huludao II. Qingdao: Located at 0/20.3 degrees east longitude and 36 degrees north latitude, it is the largest seaport in Shandong Province and the headquarters of the North Sea Fleet. The port area is located in Jiaozhou Bay. The anchorage areas in the west, such as Taiping Bay, Loyalty Bay, Qianwan and Tuandao Bay, are called outer ports together with Xiaoqingdao Port, with an average water depth of more than 20 meters. The inner ports on the east side include Dagang, Niugang, Xiaogang and Huangdao Oil Port. Dagang is dominant, with a water depth of 5- 13m. 3. Lushun, Huludao and Qingdao are the main military ports of the North Sea Fleet (the fleet is responsible for the defense task from the mouth of the Yalu River to the southern part of Lianyungang), but Lushun Port has not been fully opened to foreigners so far. Other surface ship bases of the North Sea Fleet include Weihai and Chengshan, and small ships and auxiliary ships are basically deployed. The North Sea Fleet has nearly 300 combat vessels and auxiliary ships along the coast. 4. Shanghai: East longitude 12 1.4 degrees, north latitude 3 1.2 degrees, which is the largest seaport in China. The military wharf is mainly located at Wusongkou, where Huangpu River enters the Yangtze River. After years of construction, the infrastructure is good, with about 50 berths. There are some escort ships and small combat vessels docked all the year round. Looking back along the river, you can see a large number of auxiliary ships and landing ships. In the upper reaches of Huangpu River, there are famous Hudong Shipyard and Jiangnan Shipyard. The former has produced almost half of frigates and a large number of missile boats for China, while the latter is a major manufacturer of destroyers and submarines in China with strong technical strength. Therefore, the ship repair capacity that Shanghai Port can provide is probably unmatched by other bases. This should be one of the advantages of Shanghai military port. However, there are also some problems in this port, mainly because the Huangpu River channel has become more and more crowded in recent years, and the urban area of Shanghai is also expanding. Military facilities are surrounded by civilian buildings, and it is very risky for warships to dock in completely open waters. Therefore, although there are many berths here, it is not advisable to dock too many ships, especially combat ships. 5. Zhoushan: Located at 122. 1 degree east longitude and 30 degrees north latitude, it is the largest harbor area in Zhoushan Islands, including Dinghai, shenjiamen and Laotang. The port area was designated as the dock of the main battleship of the East China Sea Fleet. There are not only brigade-class destroyers and Jianghu-class and Jiangwei-class frigates made in China, but also two modern-class destroyers purchased from Russia. The waters in Dinghai Port Area are 8 kilometers long from east to west, 4 kilometers wide from north to south, and the average water depth is 8 meters. 6. There are many small islands in Zhoushan Archipelago, as well as naval anchorage or wharf (even Putuo Island, a famous religious shrine in China). Usually, only some small ships or auxiliary ships are berthed, but in wartime, multiple standby and hidden berthing points can be provided for the main ships, which is conducive to preserving the strength of the ships under the strong offensive of the other side. 7. Guangzhou: Located at 1 13.2 degrees east longitude and 23. 1 degree north latitude, it is the largest seaport in Guangdong Province, and its military wharf is located on the west side of the new wharf area on the north shore of Huangpu Port (the outer port of Guangzhou Port). Because Guangzhou has the largest shipyard in the south-Guangzhou Shipyard, the ships belonging to this base also have good technical support. Zhanjiang: It is located at east longitude 1 10.4 degrees, and north latitude 2 1. 1 degrees. It is the second largest port in Guangdong Province and the seat of the South China Sea Fleet Command, with an average water depth of 10 meter. Since 1980s, due to the increasingly obvious sovereignty problem of the South China Sea Islands, Zhanjiang Port has carried out a large-scale expansion project from 1983, which is still going on. The surface ships of the South China Sea Fleet mainly include two escort detachments, 1 minesweeper detachment and 1 landing ship detachment, and most of the main surface ships are arranged here. Sanya: Located at 109.5 degrees east longitude and 18.2 degrees north latitude, it is the southernmost excellent seaport in China and an outpost supporting the South China Sea Islands. The average water depth in the harbor is 10-25m, with a vast area and excellent water depth.