PhantomFandom Member Friday at 9:09 AM #21 Join Jan 1, 2019 Messages 24 Likes 10 Friday at 9:09 AM #21 Bob Johnston said: What hasn't been mentioned (I dont think) is that the ac lands in place if rth is initiated within 3-20 meters of home point. Click to expand... Thanks! It was mentioned in passing. The Spark is so much more complicated in its various RTH scenarios depending on distance from you and altitude. The Spark RTH Flowchart is where to look at all the details.