Nomans is NOT a place to go unless you have a buddy boat or really REALLY know the area. If you get in trouble out there you are on your OWN. I wish OTW would stress more of this type of stuff they make it sound like you can go out there in a 10' jonboat.
ANY swell can and will suck the water right out from under your boat and it's VERY easy to hit. I have charted rocks beyond the 400 yard point that George talks about.
Bottom line is pick the best fac day you can, do NOT attempt going there in anything less than a 20' boat. It can be a VERY long ride home and it changes VERY quick out there.
I can remember a ride I did with Joe Leclair a few years ago we were white knuckled the entire way back
I still shudder at that day.