Carrier Strike Group Three (CSG-3 or CARSTRGRU-3) is one of six U.S. Navy carrier strike groups currently assigned to the U.S. Pacific Fleet. CARSTRGRU-3 is currently based at Naval Base Kitsap, Washington, and it typically deploys to the U.S. Seventh Fleet operating in the Western Pacific (WESTPAC) and the U.S. Fifth Fleet in the Indian Ocean and the Persian Gulf. The Nimitz-class nuclear-powered aircraft carrier USS John C. Stennis (CVN-74) became the current flagship for Carrier Strike Group Three, replacing the USS Carl Vinson which began its 36-month mid-life refueling and complex overhaul in 2005.