What type of guidance does a missile use that relies completely on commands from the launcher?

The type of guidance that a missile employs, relying completely on commands from the launcher, is known as command guidance. In this method, the missile does not have the ability to autonomously detect or track its target. Instead, the launcher sends control commands to the missile throughout its flight. This allows for continuous adjustments to the missile's trajectory based on the launcher's assessment of the target's position and movement.

Command guidance is advantageous in scenarios where precise target tracking is necessary, and it can be effective for engaging moving targets. However, it does require constant communication between the launcher and the missile. This characteristic is what distinctly sets command guidance apart from other types like homing guidance, which enables missiles to seek and follow targets independently, or hybrid guidance systems that utilize a combination of methods.

In summary, command guidance is characterized by its dependency on real-time commands from the launch point, making it the correct choice among the available options.