What is the primary satellite navigation system used in aviation?

What is the primary satellite navigation system used in aviation?

• A. GNSS
• B. GPS
• C. INS
• D. VOR

Answer: (A)

GNSS, or Global Navigation Satellite System, is the overarching framework that aviation uses for satellite-based positioning, navigation, and timing. It brings together multiple satellite constellations—such as GPS, Galileo, GLONASS, and BeiDou—and works with augmentations to provide accurate and globally available navigation. This makes GNSS the primary source for modern air navigation, including RNAV and PBN procedures, because it offers precise, worldwide coverage and redundancy. GPS is just one system within GNSS, so naming GNSS better reflects the full capability used in aviation. In contrast, an Inertial Navigation System relies on internal sensors and does not depend on satellites, while VOR is a ground-based radio aid.

GNSS, or Global Navigation Satellite System, is the overarching framework that aviation uses for satellite-based positioning, navigation, and timing. It brings together multiple satellite constellations—such as GPS, Galileo, GLONASS, and BeiDou—and works with augmentations to provide accurate and globally available navigation. This makes GNSS the primary source for modern air navigation, including RNAV and PBN procedures, because it offers precise, worldwide coverage and redundancy. GPS is just one system within GNSS, so naming GNSS better reflects the full capability used in aviation. In contrast, an Inertial Navigation System relies on internal sensors and does not depend on satellites, while VOR is a ground-based radio aid.