1. Terrain is shut off manually. If you loop scan, it does run longer.
This is the area where the changes you make can make a time difference. For example, looping or continue running hits etc will create longer or continuous runs.
2. It depends on which preset you choose. If you run preset like hunt and kill, it will loop and for Terrain. If you run it in remote mode, it will also repeat.
For more details, please check the link: