What are the requirements to be a safety pilot?

To be a safety pilot, the primary requirement is to hold at least a private pilot certificate and meet the necessary medical qualifications. This allows the safety pilot to act as a second-in-command during operations, particularly in scenarios such as conducting flight training in simulated instrument conditions where the safety of the flight is paramount.

A private pilot certificate ensures that the safety pilot has the foundational knowledge and skills needed to assist in monitoring airspace and the aircraft's operation. Meeting medical requirements is crucial as it ensures that the safety pilot is fit to fly. This role involves attention and support during the flight, but it doesn’t require more advanced qualifications, such as those held by commercial pilots or certified flight instructors. Therefore, the correct answer captures the essential qualifications needed to act as a safety pilot within the regulations.