What is defined as an "adverse current"?

An "adverse current" is specifically characterized as a current that opposes a vessel's intended course. When a vessel is navigating, it relies on currents to assist its movement in the desired direction. If a current is adverse, it acts against the vessel’s progress, making it slower and more challenging to maintain the intended course.

Understanding the concept of adverse currents is crucial for safe navigation, as they can significantly affect travel times and fuel efficiency, necessitating adjustments in heading or speed. This is why the definition that highlights a current opposing the vessel's course is the accurate choice. Other definitions, such as those describing supportive currents or those causing faster travel, do not align with the defined characteristics of adverse currents, which specifically focus on the negative impact on navigation.