Visitors to U.S. Navy installations who do not possess a Department of Defense-issued Common Access Card (CAC) or a military dependent ID must present a REAL ID-compliant driver’s license, state-issued identification card, or U.S. passport to gain unescorted access.
This "Navy Installations Now Require Visitors to Present Real ID to Gain Unescorted Access" was originally found on https://www.navy.mil/Press-Office/News-Stories/Term/3087/