Ammunition, projectiles fired from guns, including their fuzes, primers, and propellant charges. It is used in warfare, for target shooting and hunting, and for ceremonial purposes. In a broad sense, self-contained explosive weapons are also ammunition; they are not discussed in this article, however, but are covered in the articles Bomb; Grenade; Mine; Missiles and Rockets; Torpedo. Also excluded from this article are fireworks and nuclear weapons.
Destroyer, a highly maneuverable warship of small to medium size. The destroyer is designed to attack enemy vessels, especially submarines, and to protect other types of ships from air, surface, and submarine attacks.
The U.S. Navy's new subs will use photonics masts instead of periscopes. Learn how these imaging devices will work.