[DRG]

Any game unit can see over an obstacle that is 3 high and in that case the density of any obstacle <4 is irrelevant. There is one orchard hex that is 4 when viewed from "north - east" of B2 but it is at a lower elevation on a slope than B2 so B2 can see over it. Most Orchard is 1/3 - 1/4 the height of a "normal" treed hex and are generally 3 high though there are 4's as well.