I took the drone out to a waterfall on the weekend, it was in a gorge, so rocky cliffs on both sides (like being in a narrow valley). If you zoom in to the attached pic you can see me and the kind of environment. The thing is, I wanted to take more shots from better angles but the Phantom was reading out 5 sattelittes, which is grey on the indicator, so I got paranoid and landed it (I have read about fly aways when they lose GPS signal). I wanted to try and flick the switch to "Atti" mode and fly semi manual (the mode where it just holds altitude, not position), but I was too scared and just landed and gave up. Has anyone here ever tried flying in low GPS signal, like say indoors? Is flicking to Atti the safe option, or does that (and I suspect it will) need GPS anyway and still be a fly away risk? Thanx for the help gurus!