What time range defines night hours?

The definition of night hours, particularly in the context of navigation and various maritime regulations, often relies on a specific time range relative to sunset and sunrise. The correct answer states that night hours are defined as 30 minutes after sunset to 30 minutes before sunrise. This timing is utilized to account for the diminished natural light that affects visibility at sea and assists in ensuring safety during nighttime operations.

This definition takes into consideration both the practical implications of transitioning from day to night and the importance of having adequate light for navigation and operation aboard vessels. This period captures the time when conditions become significantly darker and visibility decreases, prompting a change in operations for vessels.

Other definitions of night hours may vary, but they generally lack the specificity provided by this particular answer. For example, defining night as dusk to dawn lacks the precision of a standard time frame, which is essential for navigation protocols. Similarly, while an hour before and after sunset or sunrise suggests a broader range, the specified 30 minutes captures the transition more accurately when most navigation rules would apply.