When my RR gun fires I can see the artillery shell animation. When an undiscovered enemy RR gun fires there's no animation. Is there any way to tell that your units are being fired on by an undiscovered RR gun other than monitoring your units for losses?
This rule also appears to apply to a RR gun you know is there (because previously discovered) but is now undiscovered.
Lastly, is there any way to apply the RR gun range template to a place to see if you are in range of a potentially undiscovered RR gun?