it will do exactly what the RX would do on any craft in that situation, it will hold the last good input while it waits for new info for a preset amount of time, then it will go to whatever failsafe setting is programmed in. generally to return home. if GPS is non functional, then it will use the inertial guidance, if it has it, or it will hover till it runs out of battery. at which time as it senses low battery power, most will lower power setting until it lands, or runs out of power on the way down. can't see it ever going balls out up.