Bearing rate helps forecast a maneuvering target's future location primarily by indicating what?

• A. Changes in speed.
• B. Turn rate.
• C. Distance to target.
• D. Altitude.

Answer: (C)

Bearing rate is the rate at which the line-of-sight angle to a target changes. This angular motion is most informative about how far away the target is: a target that is close will produce a rapid change in bearing for any lateral movement, while a distant target will cause the bearing to sweep more slowly. Because distance directly influences how quickly the bearing can change, bearing rate serves as a practical cue for estimating range and, from there, projecting where the target will be next as it moves.

Speed changes, turn rate, and altitude relate to other aspects of the target’s motion—how fast it’s moving, how its heading is changing, and its vertical position—rather than the angular rate of change seen in bearing rate.