What are the consequences of misinterpreting a bearing due to parallax?

• A. Incorrect target position, potential navigation or engagement errors; verify with multiple measures
• B. Improved accuracy
• C. No effect
• D. Only affects bearing resolution

Answer: (A)

Misinterpreting a bearing because of parallax means the line you think to the target is off from the actual line due to your different viewing position. That shift makes the target appear in the wrong place on your display or chart, so you can end up with an incorrect target position. From there, navigation decisions or engagement actions can be made based on that wrong position, leading to possible course deviations, missed targets, or even unsafe maneuvers.

Parallax arises because the observer’s point of view isn’t the same as the reference line used to define the bearing, and the apparent bearing changes with distance and viewpoint. Because of this, the error isn’t just a small tone of the display; it translates into real positional errors and faulty decisions. To guard against it, verify bearings with multiple measurements or sources and cross-check against other sensors or observers.

The other options don’t fit because parallax errors do not improve accuracy, they degrade it. The effect is not zero, and it isn’t limited to bearing resolution alone—the misinterpretation can shift the target’s perceived position and drive incorrect actions.