How often should one fly after reaching RL1 to maintain currency?

To maintain currency after reaching the required level of proficiency, the answer specifies that a combination of flight hours is necessary: totaling 24 hours over the course of a year and at least 4 hours within any given month. This framework ensures that the crew member remains familiar with flight operations and procedures, gaining regular exposure to flying activities which are essential for skill retention and safety.

Flying 4 hours each month contributes to ongoing practice, enabling the crew member to stay proficient with decision-making, handling of the aircraft, and teamwork dynamics. Meanwhile, adhering to the annual requirement of 24 hours ensures that individuals do not let extended periods of inactivity lead to skill degradation.

Other options suggest different time frames for maintaining currency, but they do not align with the best practices for ongoing operational readiness and proficiency that the established standards advocate. Thus, the specified requirements ensure that crew members remain competent and prepared for safe flight operations.