What are the three definitions of night used in aviation?

In aviation, the definition of "night" is crucial for various operational regulations and considerations. The correct choice outlines the criteria used to define night as it relates to visual flight rules and other operational factors.

The three components of this definition are sunset, one hour after sunset, and one hour before sunrise. Sunset marks the transition from day to night, and the period that follows, extending for one hour, is when pilots must operate under night regulations. This definition is particularly important for activities like instrument rating requirements and visibility conditions, as the lower light levels significantly impact flight safety and visibility.

Identifying night with specific times around sunset and sunrise helps standardize operations, ensuring pilots recognize when to adhere to night flight rules, such as using instrument approaches, maintaining certain lighting on aircraft, and understanding the limitations imposed on flight visibility and operations during those hours.

Other options may include inappropriate components or fail to capture the essential timings surrounding sunset and sunrise relevant for aviation operations.