No vertigo for me... Love stuff like that, just hovering and looking down to nothing but black. But when you dive it all the time, you just get use to it. There's a dive that thats 12 miles off the coast of the island... little banks in the ocean thats about 65-80' at its highest point. awesome dive, but can only go at certian times of the year or the current will take ya. A buddy of mine did that dive once with his wife and came very friendly with two white tip hammerheads. Lucky nothing happened, just the typical circling routine, but freak the wife out enough that she won't dive again.