The U.S. Navy's Puget Sound Naval Shipyard, and Naval Base Kitsap (comprising the former NSB Bangor and NS Bremerton) are on the Peninsula.
Naval Base Kitsap is the largest naval organization in Navy Region Northwest, and it is composed of installations at Bremerton, Bangor, and Keyport, Washington.
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The highway travels generally east from an interchange with SR 3 east of Naval Base Kitsap at Bangor to the main entrance of the Naval Undersea Warfare Center in Keyport.