NAS Sigonella has the best claim to be hub of U.S. naval air operations in the Mediterranean. The base command is landlord to more than 40 other U.S. units. Among the largest are a rotating P-3C patrol squadron; a Naval Computer and Telecommunications Station; and a U.S. Naval Hospital. The hospital was built in 1992. Previously, there was only a clinic and the closest U.S. Naval Hospital was at Naples. Sigonella is home to more than 4,000 troops, civilian personnel, and family members.