RTH button on controller-Useful? | DJI FORUM
2018-6-20 · I think the RTH button on the controller is useful whenever you disconnect as it sends a beacon signal that intermittently can be recognized by the Spark. Obviously you need GPS, and when the Spark disconnects it enters RTH automatically after 3 second disconnect, but there's always a chance your RC disconnects but reconnects without one knowing it?
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