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Multiple Choice

How does a change in a target's vector appear on ARPA?

In ARPA, a target’s future position is predicted by extending its current velocity vector into the future. When the target changes its velocity—its course or speed—the vector changes, and the predicted path is recalculated from the new vector. That update shows as a bend or curve in the predicted track, signaling a course or speed change. If the motion stayed the same, the path would be a straight line; the bend appears precisely because the vector has changed.

In ARPA, a target’s future position is predicted by extending its current velocity vector into the future. When the target changes its velocity—its course or speed—the vector changes, and the predicted path is recalculated from the new vector. That update shows as a bend or curve in the predicted track, signaling a course or speed change. If the motion stayed the same, the path would be a straight line; the bend appears precisely because the vector has changed.