Situation: two Troops (both Prone) and a Mine Marker and positioned in a straight line so that the Mine Marker is in between the Troops. Do Troops have LoF to each other? Mines have a profile, where their Silhouette is specified to be 0. At the same time, mines are represented on the table as a Mine Marker, and LoF rules tell us that Markers do not obsctruct LoF. So does Mine (as a Mine Marker) obstruct LoF (because it has S0) or not?