Purchase a dedicated GPS receiver of high quality. They do get map updates, and they even work in places where there are no roads. There are also Iridium-based devices that can call for help even when you are in a region with no cell service.
Dedicated GPS really is a great idea. Everyone is so accustomed to having everything in your hands. That’s how cellphones became pagers, voicemail, calendars, pedometers,weather stations, cameras, videos, entertainment, social media connections, house security monitors.
It is supposed to work as a cellphone. All of that connectivity includes tracking.