What does a 'return-to-home' function generally do in a GNSS-failure scenario?

What does a 'return-to-home' function generally do in a GNSS-failure scenario?

• A. Return the drone to the takeoff location using pre-programmed coordinates.
• B. Hovers and waits for GPS to return
• C. Immediately lands at current location
• D. Switches to manual control only

Answer: (A)

In a GNSS failure, the return-to-home function relies on a fixed reference: the takeoff point stored as pre-programmed coordinates. Even without satellite navigation, the drone uses those coordinates as the target and autonomously flies back toward the launch location, using what it can from its remaining sensors to guide altitude and orientation. This approach provides a defined destination rather than leaving the aircraft drifting or waiting for GPS to reappear. The other options describe actions that don’t actually bring the aircraft back to a known launch point—hovering in place, landing immediately at the current spot, or handing control to the operator without a defined return path—whereas returning to the takeoff coordinates is the designed automatic response to GNSS loss.

In a GNSS failure, the return-to-home function relies on a fixed reference: the takeoff point stored as pre-programmed coordinates. Even without satellite navigation, the drone uses those coordinates as the target and autonomously flies back toward the launch location, using what it can from its remaining sensors to guide altitude and orientation. This approach provides a defined destination rather than leaving the aircraft drifting or waiting for GPS to reappear. The other options describe actions that don’t actually bring the aircraft back to a known launch point—hovering in place, landing immediately at the current spot, or handing control to the operator without a defined return path—whereas returning to the takeoff coordinates is the designed automatic response to GNSS loss.