Hi Adam, the Etrex is your best bet. It’s a brick of a device, but runs on 2 x AA batteries that should give you 24 hours of navigation. You can plug in a micro SD card with Open Street maps loaded. It will give you a line on a colour map like in the photo.
Hi Adam, the Etrex is your best bet. It’s a brick of a device, but runs on 2 x AA batteries that should give you 24 hours of navigation. You can plug in a micro SD card with Open Street maps loaded. It will give you a line on a colour map like in the photo.