Thanks for the replies. Is there any way to get the orientation to be relative to the current RC position, as I constantly move around while flying my drone and lose my own orientation to the home point. So showing me the direction of the drone relative to the home point doesn't really help me much,
Related - do I need GPS in my device (iPad
Air 2 - non cellular - non GPS module) if I want the drone to be able to update the RTH position to my controller? I will be on a boat in Greenland next week and will need to set the RTH to the RC position and I believe I have to continuously update that as the boat moves.
If you want to be able to reset your homepoint to the current location of the controller, you must have a GPS enabled tablet - so the app has a current location.
Apple leave out the GPS module on non-cellular iPads.
If you get a GPS enabled tablet, and reset the home point, it just resets once to the current location - it does not continuously update.
You can also update homepoint without GPS in your tablet - update to the current location of the Phantom rather than the controller.
If you are flying out of sight, you would want to reset to the controller's location, but if you were only flying relatively close to the boat as the boat is moving, you could simply reset to the location of the Phantom and so avoid the situation where the Phantom believes it is miles from home and has to RTH as the battery level is only enough to get all the way back there.
If you are intending to fly from a boat, you need to have practised all the things you will be doing ... hand catching, resetting home etc.
Out at sea is a bad place to be learning and an unforgiving environment.
Never launch from a steel surface or close to steel objects - you may have to hand launch as well.
Never calibrate the compass close to steel.
And be aware of potential compass problems in far northern latitudes as well.