Why you can't trust Google Maps,
cue sheets, & turn-by-turn directions
Better options for offline navigation
Here are my recommendations for offline navigation services.
Briefly, my favorite program is the premium version of GaiaGPS (which in 2023 costs $40 per year). A free alternative is Guru Maps which allows you to download Open Street Map basemaps of entire states for offline use. Follow the link above for more information.