Question 728Navigation General

The correct answer is A) Navigational constraints may require a target vessel to change course. When using an ARPA (Automatic Radar Plotting Aid), it's important to consider that the displayed information may not fully account for navigational constraints the target vessel is facing. The target's course and speed are determined based on radar inputs, but the target may need to change course due to factors like channel boundaries, traffic, or weather conditions that are not reflected in the ARPA display. Properly evaluating the ARPA information requires the user to consider these external factors that could impact the target's maneuvering. The other options are incorrect because B) the ARPA can detect small targets, C) the trial maneuver feature does not automatically determine a safe course, and D) the target's information is based on radar inputs, not solely on that.