What must a recreational pilot have on their person while acting as pilot in command?

A recreational pilot must have a current logbook endorsement while acting as pilot in command. This endorsement serves as proof that the pilot has received the necessary training and is qualified to operate in the specific aircraft category they intend to fly. It reflects the pilot's recent instruction or assessment by a certified instructor, ensuring that they are current in their skills and knowledge regarding that particular type of aircraft.

Having a current logbook endorsement is essential for ensuring safety and proficiency. Without this endorsement, a recreational pilot might lack the necessary skills to handle in-flight situations effectively, which can jeopardize safety.

Regarding the other options, a valid airport ID, a medical certificate, and flight plan approval are not required specifically for recreational pilots or while acting as pilot in command. While a medical certificate is important for overall eligibility, it is not something that must be physically present on the pilot's person during flight. Flight plan approval is also not a requirement for all flights, especially those conducted under visual flight rules (VFR), which are often used by recreational pilots.