Thank you for your analysis Meta4, its greatly appreciated. I agree with your numbers but the point of confusion still lies in the fact that the logs report an altitude of 54 feet upon impact. There is nothing near the impact location thats 54' tall. I don't understand why such a discrepancy in numbers. If the impact altitude was 54 feet, it didn't rise a whole lot when it rose to 62/65 feet for the RTH altitude. From the operators perspective, this behavior didn't appear to be a RTH, I thought it was interference and spent those critical 9 seconds trying to regain control rather than cancelling the RTH