Formulate an answer to this elaborate question:  State Route 308 (SR 308) is a 3.42 mi state highway in the U.S. state of Washington, serving the community of Keyport in Kitsap County, the highway travels generally east from an interchange with SR 3 east of Naval Base Kitsap at Bangor, Naval Base Kitsap is a what type of site, located on the Kitsap Peninsula in the state of Washington?
U.S. Navy base