navigation hardware and map system for Mongolia?

[jdogrunner]

I'll be in Mongolia on a motorcycle in 2025 and I need navigation hardware that has good battery life and is (or can be made) weather resistant and can run software offline that has adequate topo map coverage of Mongolia for offroad travel. I don't need to mount it on the bike, but it would be nice if it was small enough to fit into a tank bag.

In the US I use a hardwired Garmin device and supplement with an iPhone running Gaia. Someone has suggested using the iPhone with Osmand which seems like an okay solution but I'd like to have a dedicated navigation device (like an inexpensive Android phone), and only use the iPhone as a supplemental device. I also can't figure out what mapping software has the best (most detailed) coverage of Mongolia. Appreciate any suggestions or ideas as I haven't navigated outside of North America.

 

[Andrew afain]

We used Gaia GPS app for your phone. You can download maps to the local device so you don’t need cell data.

Worked really well most of the time. Roads are actually there when driving off the asphalt. The condition might not be great but there is a track. And it captures tracks up to individual winter shelter for animals too. Certainly beats the large scale map we had!

 

[Andrew afain]

This is clearly zoomed in on the map and shows actual track vs planned vs the other roads