What is the main feature of a Semi-active tracking system?

A semi-active tracking system is characterized by its reliance on an external source to direct energy towards the target. This method typically involves a situation where the target does not emit energy on its own—instead, it relies on a beam of energy that is emitted from a different source, such as a ground-based radar or an onboard radar system in the launch platform.

In semi-active tracking, the missile or projectile homes in on the reflected energy from the target, which is illuminated by the external source. This is a crucial distinction, as the system requires the assistance of an outside transmitter to guide it to the target accurately. The semi-active tracking system combines the advantages of accurate guidance with the ability to engage targets effectively while minimizing the equipment needed onboard the weapon itself.

The nature of this tracking method allows for a more extended engagement range and the flexibility to adapt to various types of targets, essentially enhancing the weapon’s effectiveness in different combat scenarios.