There are some of both, actually. We have some instructors from nuke school, some sub guys, some surface guys, etc. As for when you leave for NSI, I can say definitively, but I would bank on not leaving til summer if I were a betting man. I'm not certain, but as I said earlier, I beleive there is only the BOOST/NSI combo in the spring, no single NSI class. I believe the only plain NSI class is the one about to graduate now. I had the same expectation of leaving in the early spring and boy was I ever wrong! Good luck, though.