Nice Doug!!
I've always wanted to do N Carolina and now I'll just have to get up there!!
What a great place for rebreathers!!
Great shots!! You must be really proud of your daughter too..... 
I've dove on a boat with Walt several times, he is very knowledgeable...., did you say who your charter was? Let me know, I'm interested.
Also I can't tell if that is a roughtail ray from your photo angle, could be?? They have very, very obvious spines all the way down to the end of their tails (which I thought looks like a kind of a "mace"....)! I hear the roughtails are more numerous up there but we also have them in South Florida - I saw a 7 ft. span one (as you say bigger than any southern stingray I've ever seen) under Commercial Pier when they still used to fish there and we were doing a cleanup several years ago. Also friends of mine caught hold of, actually "freed", three roughtail stingrays from a power plant intake gate in South Florida. One of my dive buddies who said his job was to hold a rag around the large 7' span female's stinger said it was an extremely wild ride and one that he knew whatever happened he could not let go of that rag (as there were several others grasping her from the front and wings)!!
We have such interesting fish and creatures here in Florida and the Atlantic don't we??
Thanks so much for the post and pics, Best, Carol