Guidance system using onboard radar to actively emit and receive signals for target tracking and missile course correction.

Launched from a ground-based platform, such as a vehicle or tripod, rather than an aircraft or other airborne system.

Launched from naval platforms, such as ships or submarines.

Sea‑skimming is a low‑altitude flight profile in which a missile or projectile flies close to the sea surface to minimize radar detection and increase survivability.