I guess I missed some replies in my haste so now I have a better understanding of things you need and also to think of what I'd need as a marine biologist. You've all been great. Of course I just have one more little question. I am only 20 and know no one else who dives. I only have 3 dives in from the class. Where do you go to dive with other people or should I take the next level (I live in Maryland and hope, wish, I can go to grad school in Australia)? Whatever, I absolutely love it!