From the current Navy Nurse recruiting pages:
Navy Nurses may serve at any one of more than 250 Navy and medical facilities around the globe, from Hawaii to Japan, Germany to Guam, and Washington, D.C., to Washington state.
As a Navy Nurse, you could work at one of the highly acclaimed National Naval Medical Centers in Bethesda, Md.; Portsmouth, Va.; and San Diego, Calif. Or you could provide medical support to deployed troops aboard one of two dedicated hospital ships: the USNS Comfort and USNS Mercy.
Still more opportunities are available stateside and abroad – onboard a surface ship, working closely with a nearby aircraft squadron, or even with the Fleet Marine Force.