dmssssss is correct, the route goes on the face below, it's not an uncommon Black Canyon style traverse pitch...goes up, goes down, then up. It follows good rock to get to the anchors. On one of our forays we also went under that roof... not very much fun. Guess that's why it's called Rockineering. If I remember, there is a pin placed in a horizontal directly across from the belayer halfway out the traverse, but I'm not sure it is visible from the belay. The topo has it marked pretty accurately.
Not sure why I called this pitch 8, I must have had my numbers mixed up. I'll change it. I've done Atlantis a couple of times and I think we stayed lower the first time I did it (this is a picture from the second time). However, I don't think we stayed low enough to find the pin. At least I don't remember a pin. I'll definitely keep that in mind if I do the route again. As I recall, it felt like we were just "following our noses" and as you know, can get "off route," which off route seems to be "on route" a lot in the Black. That being said, I actually didn't think it was too bad going high like we did although now I'm really curious what the proper way is like. Sounds a lot better.
The pin is really low, level with the belay or a bit below. It is a rusty knifeblade in a horizontal, that moves a half inch or so if you don't manage to yank it all the way out. We went above it but below the roof. This pitch will take a bit of time to figure out, but it's okay.