Which statement best describes the purpose of common aviation navigation systems such as GPS, VOR/ILS, and INS?

Which statement best describes the purpose of common aviation navigation systems such as GPS, VOR/ILS, and INS?

• A. They ensure structural integrity of airframes.
• B. They provide weather forecasting.
• C. They manage air traffic control communications.
• D. They provide position, velocity, and navigation information to determine aircraft location and track.

Answer: (D)