What are the two basic methods of radar scanning?

The two basic methods of radar scanning are mechanical and electronic. Mechanical scanning involves physically moving the radar antenna to cover a wider area, typically using a rotating or tilting mechanism. This method allows the radar to acquire targets over a designated angular range by directing the radar beam in different directions.

On the other hand, electronic scanning (often referred to simply as "scanning") utilizes phased-array antenna technology, allowing the radar to steer its beam electronically without any moving parts. This enables quicker adjustments in the direction of the radar beam and can provide superior tracking capabilities and faster target acquisition compared to mechanical methods.

The other options, while related to aspects of radar technology, do not correctly identify the two fundamental scanning techniques used in radar systems. Understanding the distinction between mechanical and electronic scanning is essential for grasping how radar systems operate and their respective advantages in various applications.