I think it would be a useful feature to have a unit placeholder on a map for any unit discovered through scout, or fly over. Any unit reveal could stay on a map for 2-3 hours, with time of sight. If unit has been spotted, any military would track it as much as they could, it only makes sense to have this temp map state for the units revealed.
If it looks stupid but it works, it isn't stupid.
If it looks stupid, it works, and it is also dangerous as hell, it is Russian.