I did crossing africa with the iPad as GPS Solution. Some parts just following the way
Google Hybrid Satellite View will lead. It is still my primary Navigation-Device, soon i left the coverage of the built in Sat-Nav (Europe).
Many Apps help us overlanders too, like iOverlander, Park4night.
Unfortunately the way to download 20 Gigabyte of Offline-Google Satellite view is over. But today you can precache a lot, are able to buy cheap local sims with data packages in the most parts of the world... Precaching the next days with no coverage is easy.
Did use ipad 1-2 and ipadair - over the years - anytime with simcard-
A lot of Apps offer offline roadmaps like maps.me, here - offer download offroad tracks and so on.