One day, I'll come up with a legitimate way to use that Mortar... 
Best bet in my opinion use it to throw drone rounds over a target to get extra intel (Sorry if I am quoting from someone's idea. I just cannot remember if anyone had used this before). The round would be relatively stealthy as the only electronic signature would be from the electronics used to map out or photograph the target. It would not even need to have a signal because the round could be retrieved in order to get the intelligence.