Which term corresponds to One Range and One Bearing equal?

• A. Estimated Position
• B. SERRATED RANGE RINGS
• C. Water in the Waveguide
• D. Sub Refraction

Answer: (A)

When you’re plotting position from radar or navigation data, you normally need two independent observations to pinpoint your exact location with confidence. A single range to a known point gives you a circle of possible positions around that point, and a single bearing to a known point gives you a straight line. The true position would lie at an intersection of that circle and that line. In practice, there’s uncertainty in both measurements, and you often don’t get a clean, unambiguous intersection. That’s why a position derived from just one range and one bearing is treated as an Estimated Position—a best guess based on partial data, to be refined as more information becomes available.

If the geometry happened to yield a unique intersection (for example, in a tangential case), you still wouldn’t have the redundancy needed for a definitive fix, so the result is still considered an Estimated Position until additional observations are obtained.