In fact, all of the big raid FATE bosses are visible across the entire map, same as S rank hunts.
Hmm.. maybe not entire all. I can't vouch for Odin, but that could be as much about all the trees being in the way, and generally being near-player sized and hard to pick out..
Coeurlregina, tho, pretty easy to spot if you fly up high, with such a tall map.
