The HorseFly™ UAV is unique in its use of a human monitor during the final package drop-off stage of delivery. When the UAV is in position above the destination, a remote observer is sent a video feed, which can be used to assess the safe completion of the delivery and make any small adjustments to the UAV position during drop-off, if needed. By monitoring this crucial stage of the process, we can deliver a more flexible and trusted delivery than full-automation alone. Using this method, a single remote observer can efficiently monitor a fleet of many UAVs at once, since observation is only needed during the final descent and not during normal flight operations.