Wlfpk48

Reality If the JTACs are using FM...they are definitely LOS. That is unless they're using SATCOM...not likely, so it's tactical FM. Obviously they have to be able to see the target, or in contact with a "unit" that has their mk I eye balls on target where the JTAC can grid it out on a map. http://en.wikipedia.org/wiki/Joint_terminal_attack_controller