Naval mines do not seem to be working. I am using a mine which consists of a 1st stage buoy with "No Engine" and active sensors (range 6mil km), containing a second stage of two anti-ship missiles with active sensors (range 6mil km). Separation distance is configured to be 5mil km.
If you use the "Launch Ready Ordnance" command, the mines erroneously disappear immediately (you don't even see them appear on the map even after a 5-second interval) unless a target is
already within range, making them unusable as a long-term static defense.
Alternatively, if you target a distant waypoint (such as "Point of Interest #1") with the MFC to which the mine missile launchers are attached and "Open Fire", the mines appear on the map and persist forever. However, as you can see below, they remain targeted at the Point of Interest forever and do not retarget enemies that are in range. Even if you delete the POI, the missiles remained locked onto the non-existent POI and do nothing. Moving your ship so the mines are out of MFC range likewise does nothing, they remain locked onto the POI forever.
It is possible I am doing something wrong, but I can't find anyone else who has direct experience with working C# mines, and I am out of ideas.
SJW: Fixed for v1.14