Relax, this is not "The Interview" with the Admiral where you have to break models and get shut in closets.
The VIP trip is to make sure you know what you are getting into as well as get you prepped for "The Interview".
Wear a collared shirt and slacks, you'll be fine. Leather shoes are good as well but they don't have to be wingtips or penny loafers; in fact, let's hope their not. You'll be touring a submarine and probably a small boy if they can't get you a carrier tour, so the footwear needs to be safe.
You will spend some time with the Nukes going over probable questions you may be asked on the interview.
Example:
An EE type was shown a circuit and asked how many volts came out the end. He looked at it for a few seconds and said, "One." Great answer, they said, now the guy has 59 minutes and 30 seconds more to grill you. The point being they want to see your thought process. If you can prove you have an analytical mind, solid engineering fundamentals, confidence and a never give up attitude, you will be good to go. The interviewer will be looking at you and trying to picture you leading men in a combat situation, if they can picture that, you are solid.
Funny story. I had a recruit who just plain talked too much. I wasn't sure we should even have sent him on the VIP trip but the Nukes wanted to see him so we he got to go to San Diego. They only had one car for five people and the close quarters did not help him. By the end of the 1st day he had earned the nickname "Blanket Party". He wasn't a bad guy, he just literally could not sit still or keep his mouth shut. Had we sent him on he would have been fragged by reactor watch standers on his first shift. I took another recruiter with me for moral support when we told him that he just didn't have the "communication skills" to be in a submarine, i.e. he talked too much. God bless him he just didn't get it. In a last ditch attempt to change our minds as we were leaving he says, "Can I just tell you story?" I dunno, maybe you had to be there.
Anyway, don't sweat the VIP trip, ask lots of questions and have fun.
R/
Steve