Fighting Terror and Looking Good

This is beyond trivial, but seeing photos of Chairman of the Joint Chiefs ADM Mullen in the news forces me to ask, how many uniforms does the Navy have? There's the blues, and the whites of course, but there's also long sleeved mandarin collar whites, a dressed down tan, a utility uniform, and (the uniform that prompted this post) a more formal tan. I will refrain from Navy jokes, but seriously, is all this really necessary? Let's expend some brain power to get to the bottom of this most important question.