Why
Signal can be blocked by terrain, buildings, interference or poor antenna orientation. A control-link loss is different from a video-link freeze. The aircraft may still accept inputs even when the image stalls.
What to do next
- 01Before flight, verify the signal-loss action and RTH altitude.
- 02Keep visual line of sight; do not chase an advertised transmission range.
- 03Point the broad face of controller antennas toward the aircraft as instructed.
- 04If the feed freezes, stop moving, check telemetry, climb only if safe and legal, and prepare for failsafe.
Important exceptions
- Without GPS, a drone may drift rather than hold position.
- Over water or under obstacles, automatic landing may create extra risk.
- Custom FPV failsafes must be configured and tested without propellers first.
Safety note: Aircraft behaviour varies by model, firmware and configuration. For legal or safety-critical decisions, use the current manual and official aviation authority guidance.