(Obviously it would be bad for new Nav students if they dont get the basics down pat first-but after that)
Why? We (yes me too) are still teaching nav like we're dropping bombs on Germany in 1942. Pilot students graduate then are cleared live to use what they want with no training in GPS at all, including its limitations.
Sure in 1973 I'd be sceptical too, but it's been now about 20 years since cheap consumer GPS's have been out. They are more faithful and safer to me than DR has ever been. Only time I've
ever used DR is teaching it.
It's a good idea to disable Location Services when not required, as these chew thru the battery even when the device is not being used.
Incorrect - when you are back on the home screen, or the screen is off, the GPS will turn itself off. There's a few exceptions like apps that are allowed to do minimal processing in the background, but not OzRunways. You can tell when the GPS and gyro's are ON because a little arrow appears in the very top right next to the battery level.