Taking baby steps with my new Phantom. There has been a lot of discussion and videos of beginners using Phantom mode or Naza mode... Along with those discussions and vids I have found a lot of conflicting information on the functionality of S1. I updated both my controller and phantom about 2 weeks ago (when my phantom arrived) to the latest firmware. 3.04 I know S1 is used for compass calibration in both Phantom and Naza modes, but during flight, I would like to know DEFINIVELY what S1 does. In Phantom mode (as shipped): My understanding from the manual is: Up is RTF-GPS, and the other two positions do nothing unless in failsafe mode, and then either can be used to regain control of the phantom. In Naza mode (as shipped) My understanding from some of the posts here and some videos is: Up is GPS mode. and either of the other two are defaulted to ATTI mode. I am thinking that some of my confusion may be due to the some of the vids being created with an earlier/different version of firmware, and the switches functioned differently back then. Maybe not. Thanks.