I believe that LOS is just a straight line extending from your eye into the distance, so if it was just LOS it could be out of sight due to distance but still in your "line of sight." As an example, a distant mountain is in your line of sight but if you flew your Mavic to it you would no longer have VLOS.Just curious, can one have LOS without it being VLOS? "Visual" seems redundant to me, not sure what distinction people try to make with it, rather than just typing LOS.