I don't know about that Calax, a carrier is practically a floating city. As a fire control tech I think a cruiser or destroyer is most likely. Like Sand said, sub duty would be the worst, especially is you are even a little claustrophobic. I made three floats on LPDs (in the USMC a ship deployment is called a "float"). LPDs are amphibious assault ships. The Navy calls them "Gator Freighters". That isn't much fun either, the ships are small and VERY crowded. And they are flat bottomed, I did not know why that was a big deal until we got into some foul weather.
I don't know if they still do this but I remember it was something of a tradition in the Navy for the top graduate of every C school class to have their pick of available orders. So if you do well in school you get to pick your ship or duty station from what's available.
BTW...When do you ship out?