Curious to know exactly what happens when signal is lost using this scenario. Lets say I was flying out and decided to descend into a valley but at some point lost my signal during the decent. Correct me if I'm wrong but i think you have to have lost signal for 3 seconds before the RTH function kicks in. Would the phantom continue with the decent since this was the last known input or does it stop and come to an immediate hover? Just wondering if I could impact the ground while waiting for the 3 second rule to kick in if I were perhaps only 30' agl or less when signal is lost?