What specific documents must pilots carry for every flight?

Pilots are required to carry specific documents to ensure compliance with aviation regulations and to demonstrate their qualifications to operate an aircraft. The correct answer identifies the essential documents needed for every flight: a valid pilot certificate, a government-issued ID (which often may include a driver's license), and a medical certificate.

The pilot certificate verifies that the individual is legally authorized to fly and specifies the type of flying they are allowed to perform, depending on their training and endorsements. The medical certificate is crucial as it certifies that the pilot meets the medical standards set by the FAA, ensuring that they are physically fit to operate an aircraft. A government ID serves as an additional form of identification, confirming the pilot's identity when required.

In contrast, other choices mention various documents that, while important in different contexts, do not satisfy the legal requirements for carrying specific documents during each flight. For instance, a pilot logbook is useful for tracking hours and training but is not mandated for flight. Similarly, insurance certificate details and flight plans may be relevant but are not required to be onboard at the time of flight. The aircraft registration is vital for ownership and legal purposes, but it is not a document the pilot must carry with them personally on every flight.