User blog comment:Master Sima Yi/Assassinews 05-08-'14 – Assassin's Creed: Rogue announced/@comment-4892808-20141026210025/@comment-4892808-20141027115453

It comes naturally to some, yes. But those with less potential can acquire it through training. I'm guessing this is the case with arno, since it seems his "eagle pulse" is a less developed version of the eagle vision used by the previous protagonsts, and we'll uprade it during the game