When in vehicles, passengers and drivers of vehicles without weapons should have a reticule so that they look at friendly units at range and identify them as well as perform contextual "looking" commands (squad skills, issuing attack orders, spotting targets).
im not sure i understand but how about this... driver has his own reticule and can also see his passengers reticule, so they can coordinate (vice versa).
well, any vehicles where you don't have a weapon. eg when you're a passenger in an apc/afv (as trickster said), when you're driving a vehicle without weapons (jeeps, weaponless apcs, etc)
Oh, my bad, I forgot that. Yeah, that's a good point, I use no-weapon APCs a lot and it's a pain to try and spot stuff.
http://www.empiresmod.com/bug_tracker/view.php?id=1791 Already thrown it there, because even if its not a bug, it feels like a bug. Sucks when u can't spot enemys or squad-arty in an APC without weapon.