iPhone not accessing gps in flight mode - instantly connects when when deactivated


I just wanted to provide some feedback regarding my experiences while traveling recently using the iPhone as a GPS mapping tracking device.
Throughout the whole trip I was using my iPhone on flight mode and keeping wifi and bluetooth active to allow connections. I sadly discovered that the GPS is either extremely slow or will not connect at all. This particularly annoying and or disasterious to the use of  http://www.inreachdelorme.com/product-info/inreach-smartphone.php or  https://itunes.apple.com/au/app/motionx-gps/id299949744.