How is 'night' defined regarding passenger carrying currency?

The definition of 'night' in the context of passenger carrying currency is critical for ensuring safe flight operations. The correct choice indicates that night is defined as the period from one hour after sunset to one hour before sunrise. This definition is aligned with regulations set forth by aviation authorities, which stipulate that pilots must have specific night flying experience to act as pilot-in-command when carrying passengers.

This time frame takes into account the level of ambient light affecting visibility for pilots. The hour following sunset can present significant challenges due to changes in lighting conditions, making it essential for pilots to have experience flying during this period. Additionally, adding the hour before sunrise allows for flight activities to take place in conditions that closely resemble nighttime, thereby reinforcing a comprehensive understanding of flying in low-light situations.

The other options mention different time frames that either do not encompass the necessary hours for adequate training or suggest broader definitions that might not align with regulatory standards. Thus, the one-hour period before and after key astronomical events like sunset and sunrise is not only standard but also enhances pilot preparedness for nighttime operations.