Editing Missile guidance (section)

====Command to line-of-sight====
The CLOS system uses only the angular coordinates between the missile and the target to ensure the collision. The missile is made to be in the line of sight between the launcher and the target (LOS), and any deviation of the missile from this line is corrected. Since so many types of missile use this guidance system, they are usually subdivided into four groups: A particular type of command guidance and navigation where the missile is always commanded to lie on the line of sight (LOS) between the tracking unit and the aircraft is known as command to line of sight (CLOS) or three-point guidance. That is, the missile is controlled to stay as close as possible on the LOS to the target after missile capture is used to transmit guidance signals from a ground controller to the missile. More specifically, if the beam acceleration is taken into account and added to the nominal acceleration generated by the beam-rider equations, then CLOS guidance results. Thus, the beam rider acceleration command is modified to include an extra term. The beam-riding performance described above can thus be significantly improved by taking the beam motion into account. CLOS guidance is used mostly in shortrange air defense and antitank systems.

=====Manual=====
{{Main|Manual command to line of sight}}
Both target tracking and missile tracking and control are performed manually. The operator watches the missile flight, and uses a signaling system to command the missile back into the straight line between operator and target (the "line of sight"). This is typically useful only for slower targets, where significant "lead" is not required. MCLOS is a subtype of command guided systems. In the case of glide bombs or missiles against ships or the supersonic [[Wasserfall]] against slow-moving [[B-17 Flying Fortress]] bombers this system worked, but as speeds increased MCLOS was quickly rendered useless for most roles.

=====Semi-manual =====
Target tracking is automatic, while missile tracking and control is manual.

=====Semi-automatic =====
{{Main|Semi-automatic command to line of sight}}
Target tracking is manual, but missile tracking and control is automatic. It is similar to MCLOS but some automatic systems position the missile in the line of sight while the operator simply tracks the target. SACLOS has the advantage of allowing the missile to start in a position invisible to the user, as well as generally being considerably easier to operate. It is the most common form of guidance against ground targets such as tanks and bunkers.

=====Automatic =====
Target tracking, missile tracking and control are automatic.