The destroyer is a medium-sized surface ships, which was born in the 90s of the 19th century, it is one of the most important strategic military cruisers of the navies all over the world. The destroyer can be divided into air defense destroyer and antisubmarine destroyer, which were widely used in the second world war. Destroyers can empower various anti-aircraft guns, torpedoes and missiles etc. to perform a variety of air, on the sea, on the potential and land attack mission. Under normal conditions, the tonnage of destroyer is in more than 5000 tons, but antisubmarine destroyer’s tonnage will be less than 5000 tons.

 

Zumwalt-class destroyer, referred to as DDG-1000, is the main type of the United States Navy surface ships. It gathered a variety of cutting-edge technology in its body, whether it is from the weapon system, motor power, network communication, navigation or detection of ship design, all that has no destroyer of other countries can compare in the world. But this feature of the huge body also makes the Zumwalt-class destroyer be vulnerable to defend the rough sea, so that it would crease the wreck threat. Therefore, tungsten alloy counterweights can be used in Zumwalt-class destroyer in order to increase the stability of navigation.