A missile can home in on its target by being programmed to follow a laser beam shined on the target, or the missile can be controlled by someone who monitors its trajectory by using a TV camera in the missile. That person manipulates the missile by using a joystick. Like rockets, a missile can be launched from a single tube or from multiple tubes. They are often mounted on trucks, helicopters, and airplanes. Grenades include hand grenades, those small, oval devices that weigh about a pound and are thrown at a target after a pin is pulled.
Grenades can also refer to grenade launchers.
These can be weapons used by individuals, or they can be mounted on vehicles and fed by crews. The individual grenade launcher looks like a single-barrel shotgun that propels what looks like an oversized bullet. Grenade launchers can fire many different things, such as flares, tear gas, or high-explosive shells. A rocket-propelled grenade can be an individual's weapon, but it is more likely to be operated by a team. A projectile, weighing several pounds and about the size of a soft-drink can, is mounted on, not in, a tube.