first i am new to this forum, second my third copter is in route as we speak ,the first two are now swimming in the deep and really wish to find out the cause , the first one i am sure it was swicth to follow mode and took off the boat my stupid mistake. now the second i was in the marina and flew two batteries well when the fist battery was close i set it down turned of the st10 and it started to take off hopped and went up to about 10 feet and returned to home , used it later in the day did all the checks and re-calibrated went to go for lift off and was going to hover as i normally do, it took off and kept going into the ocean i could not regain control or anything . stupid me didnt have the sd card in i will next time .. thanks in advance for thoughts