The U.S. Navy provides its ships with websites that include a wide variety of information on its vessels. The website address for a vessel typically uses the ship's name followed by "Navy.mil." For instance, the USS Nimitz's website is Nimitz.Navy.mil/.
Information provided by the Navy on each ship's website includes the ship's history, its current strike group and its current leadership.
The Federation of American Scientists catalogs more detailed information at FAS.org. Information available there includes ship displacement, length, aircraft, armaments and photos.
The Historic Naval Ships Association website offers a variety of information about ships used around the world. Information provided there includes class, launch date, shipyard and armaments.