Which definition pertains to "Currency" in night flying?

The definition that pertains to "Currency" in night flying refers specifically to the requirement of having recent flight experience during nighttime hours. This means that to be considered "current" for night flying, a pilot must have completed a minimum of one hour of flight time after sunset and before sunrise within a specific period, typically the last 90 days. This ensures that the pilot is familiar with night operations and is competent in the unique aspects of flying at night, such as navigation, depth perception, and the effects of darkness on situational awareness. This definition emphasizes the importance of recent experience in the night environment, which is essential for maintaining safety and proficiency in night flying operations.

Other definitions, while relevant to night flying, focus on logging flights or utilizing specific night vision equipment, but do not directly address the requirements for maintaining currency as defined by regulatory standards.