LOS on slopes

[Tubac52]

Kind Gentlemen,

 This is certainly confusing, and I thank Col. Sonichu for surfacing this matter for clarification. The 4th edition rules should be thoroughly reviewed and edited, and better illustrations are needed as has been mentioned in this thread. I salute all of you for sharing your interpretations with those of us just learning the sometimes subtle nuances of playing this complex (for me) game.
 For what it's worth, I think that the US halftracks in question can't see, or fire, at the German Fallschirmjagers from their position on what would be the reverse (opposite) side of that hill slope 4 hexes (800 meters) away. Maybe that's too realistic for the game designer to model with this kind of map art? IMHO, it would be clearer if the maps were like those in the old PanzerBlitz game, as others have said.