Which term is used for the navigation aids that help pilots find their way while flying?

The correct term for the navigation aids that assist pilots in determining their flight path is "Navaids." This term is derived from "navigational aids," which encompass a variety of tools and systems used in aviation to enhance navigation accuracy. Navaids include radio beacons, radar systems, and other technologies that provide critical information to pilots about their position, course, and altitude, ultimately improving safety and efficiency during flight.

Other options, while related to aviation, refer to different concepts. Terminal controls involve air traffic management in and around airports but do not refer directly to navigation aids. Flight management systems are integrated systems that assist pilots in managing flight plans and aircraft systems, but they rely on navaids for navigation data. Aircraft systems encompass a broader range of components related to the operation of the aircraft itself, rather than focusing specifically on navigation aids. Thus, "Navaids" accurately captures the intended concept of navigation assistance for pilots.