Which navigation aids does the ERJ-145 primarily use?

The ERJ-145 primarily relies on GPS and VHF for navigation. GPS (Global Positioning System) is a satellite-based navigation system that provides accurate position information, which is crucial for modern aviation. The use of GPS allows for precise navigation and is a standard component in many aircraft due to its reliability and accuracy in determining the aircraft's location.

VHF (Very High Frequency) communication systems are essential for maintaining contact with air traffic control and other aircraft. They enable pilots to receive navigation information and updates regarding flight routes and weather conditions. The combination of GPS for navigation and VHF for communication makes these two systems foundational for the operation of the ERJ-145.

Other options—ADF and RNAV, ILS and VOR, and INS and DME—represent different types of navigation aids that are less prominent or obsolete in modern aircraft like the ERJ-145, which focus on advanced satellite-based systems for their navigation needs.