Naval Air Station Sigonella is an Italian Air Force base, and a U.S. Navy installation at Italian Air Force Base Sigonella in Lentini, Sicily, Italy. The whole NAS is a tenant of the Italian Air Force, which has the military and the administrative control. It serves as an Italian base for the 41º Stormo Antisom. NAS Sigonella acts also as a landlord to more than 40 othe…Naval Air Station Sigonella is an Italian Air Force base, and a U.S. Navy installation at Italian Air Force Base Sigonella in Lentini, Sicily, Italy. The whole NAS is a tenant of the Italian Air Force, which has the military and the administrative control. It serves as an Italian base for the 41º Stormo Antisom. NAS Sigonella acts also as a landlord to more than 40 other U.S. commands and activities. It is located 15 kilometres west and 11 km south of the city of Catania, and some 40 km south of Mount Etna.