The rules state that units in a bunker can only direct fire along a line of sight traced through the front three hexes of the bunker. As LOS is traced through a straight line (and not like range which is traced through a series of interconnecting hexes or the forward arc of fire of vehicles which covers all the hexes in front of it), it would appear that there would be several "blind spots" (hexes) in front of a bunker (not in a straight line from the 3 front hexes of the bunker) that units in the bunker cannot fire at but which would be within the line of sight of units in the same hex but which not in the bunker. Is this correct?