Military/Government Nursing?

sorry if this is a silly question but i'm a brand new grad and i'm still learning what avenues are open to me for employment. i was at usajobs.gov and saw that there were some jobs through the navy that appeared to be at various locations throughout the u.s. these are jobs that civilian nurses can apply for, correct? in other words you don't necessarily have to be a navy (army, air force, etc.) nurse to *work* for the navy, right? any experience working as a civilian military nurse?