Electromagnetic guns, as the name implies, no longer use gunpowder, but use electromagnetic force to launch shells. Driven by powerful current, the shells fired by electromagnetic guns are much faster than those fired by traditional fire monitors. The speed of the shell is 7-8 times the speed of sound and the range is 400-500 kilometers. Air resistance will gradually reduce the speed of the projectile, but it still has five times the speed of sound when it reaches the target. The export speed of ordinary purple Dan and shells is less than 3 times the speed of sound. In the face of five times the speed of sound, steel is like tofu. There is no need to put explosives in the shells. Kinetic energy alone has enough destructive power. The US Navy announced the successful test firing of the electromagnetic gun. The speed of this electromagnetic gun is five times the speed of sound, and its range is as far as 1 10 nautical mile (200 kilometers). The US Navy Research Department declared: "The success of this test will take a step forward in applying this advanced weapon to the sea in the future." Earlier, the US Navy Times reported that the US Navy tested a so-called "the most powerful railgun in the world" at the Dalgren Surface Warfare Research Center. Admiral Roughead, the US Naval Operations Secretary who visited the test, called this kind of electromagnetic gun a "revolutionary naval weapon" and "the US Navy must not miss this kind of weapon", and claimed to install it on the destroyer DDG 1000 under development. It claims to be able to fire shells 500 kilometers away, reaching an accuracy of 5 meters and destroying all targets.