What is the purpose of using a semi-active guidance system?

A semi-active guidance system primarily relies on reflected radar signals to guide a projectile or missile to its target. In this type of system, the targeting radar illuminates the target, and the missile homes in on the reflected radar energy from that illumination. This method capitalizes on the capability of radar to provide precise tracking of targets, which is essential for directing the missile along the optimal flight path.

The system's dependency on external radar signals means it can achieve highly accurate targeting, as the missile’s guidance is directly influenced by the ongoing tracking of the target. By using reflected energy, the semi-active system can effectively manage the engagement of moving or static targets with great precision. This makes reflected radar signals integral to how semi-active guidance operates.