Final answer:
The FAA's transition to RNP is true, representing a shift towards a more flexible navigation system that permits the use of various technologies by aircraft operators for different phases of flight.
Step-by-step explanation:
The statement is true. Required Navigation Performance (RNP) is indeed a new measure of navigational accuracy that the Federal Aviation Administration (FAA) is transitioning to. This system allows aircraft operators to select the most appropriate technologies for en route and terminal phases of flight, shifting away from a solely ground-based, fixed navigational aid (navaid) system. With RNP, the airspace system becomes more flexible, enabling the use of satellite navigation and other advanced technologies to improve the efficiency and safety of air travel.