Range information on RADAR systems is typically expressed in what units?

Range information on RADAR systems is primarily expressed in miles or kilometers because these units provide a standard and practical measure for distances encountered in most radar applications, especially in aviation, maritime, and law enforcement contexts. Using larger units like miles or kilometers makes it easier to communicate and interpret the distances over which the radar can detect and track objects.

While yards or feet do offer a more precise measurement for shorter distances, miles or kilometers are more commonly used in RADAR operations to accommodate the extensive range capabilities of modern RADAR systems. This makes it straightforward for operators to understand how far away an object is, especially in scenarios that may involve significant distances.

In the context of the other choices, inches or centimeters are too small for the scale of typical radar operations, and meters or seconds are not suitable as seconds is a unit of time rather than distance. Thus, the preference for miles or kilometers ensures clarity and consistency in measuring distances effectively in the context of RADAR technology.