Mahan believes that the navy is an international service. The PLA navy is mainly composed of naval vessels and naval aviation. Its main task is to defend the enemy's invasion from the sea independently or in cooperation with the army and air force, defend the sovereignty of territorial waters and safeguard maritime rights and interests. In addition to the naval headquarters, its combat troops are also distributed in the North Sea, the East China Sea and the South China Sea.

Extended data:

The navy is an ancient arms, and the eastern Mediterranean is the birthplace of the world navy. The history of the navy can be traced back to 2000 BC. At that time, warships were paddle boats, and collision was the basic combat method.

By the middle of17th century, the sailboat fleet gradually replaced the paddle fleet, and Britain, France, Spain and the Netherlands began to establish a standing navy. /kloc-In the second half of the 8th century, the colonial wars of capitalist countries and the independence wars of North American colonies accelerated the development of the navy.

At the beginning of the 20th century, the navies of some big countries began to build submarines and seaplanes, ending the era when surface ships were the only arms of the navy, and the navy began to become a variety of synthetic services.

Baidu Encyclopedia-PLA Navy