Guadalcanal: Jungle Rules

[Major Sylvester]

I checked again: nothing in the special rules but the terrain chart in the last pages says spoting range one hex but it is not limiting terrain (therefor it shouldn't block LOS). My understanding of the rule is that a unit in the jungle can only be spotted by adjacent unit but LOS can pass through like all non limiting terrains. Also nothing is mentionned about jungle height.

Common sense would suggest it is limiting terrain and maybe height should be 20 meters. What should we consider?