Which navigation system in the TH-73 is most reliant on satellites?

Prepare for the TH-73 Systems Test with interactive quizzes. Study essential systems both online and offline. Ace your exam with detailed explanations and study aids.

The GPS, or Global Positioning System, is the navigation system in the TH-73 that is most reliant on satellites. This system utilizes a network of satellites orbiting the Earth to provide accurate positional information. By receiving signals from multiple satellites, the GPS can triangulate the helicopter's location, speed, and direction with a high degree of precision.

In contrast, the inertial navigation system operates based on internal sensors and algorithms that calculate motion without external references, making it less dependent on satellite data. Traditional navigation aids such as VOR or NDB rely on ground-based signals, while magnetic compasses utilize the Earth's magnetic field for orientation and do not involve satellite technology at all. This clear distinction highlights why GPS is the correct answer as it is fundamentally designed to function through satellite communication.