If the Invisible Jet is using stealth granted to it from Batman, how much of the invisible jet has to be in hindering terrain for it to use stealth?

From the thread literally right below this question:

http://www.hcrealms.com/forum/showpo...1&postcount=31

Question answered by a Deputy:

"You can draw LoF to any square of a base, and the squares of a base do not block LoF to the other squares. If the line is being drawn along one elevation crosses any hindering, then the line is blocked."