For the interview, it's best to err on the side of being over-dressed. When I had my interview, I wore khaki pants, an oxford shirt, tie, and a blazer. I was the only one there at the time, so I have no idea what others wear. As far as the interview itself goes, just be calm and confident. They'll prob ask you about your academics, athletic/eca involvement, and of course, why you're interested in the Navy. When I interviewed, it was in October 2001. The only "curveball" I got was the LT asked if I was Pres Bush, how would I have reacted differently to the Sept 11 attacks. That definitely put me on the spot, but it really wasn't that high pressure. GOOD LUCK!