Attack submarine USS Pasadena arrived at the Portsmouth Naval Shipyard last week for maintenance work and system upgrades. The vessel and its crew of 18 officers and 126 enlisted personnel pulled into the port on Sept. 21.

The Pasadena is the U.S. Navy’s second “improved” Los Angeles-class nuclear-powered sub. Over its 20-year history, it has conducted operations throughout much of the Pacific Ocean, including the coasts of North and South America and Australia. Its current homeport is Pearl Harbor in Hawaii.

Commanding Officer Luis Molina assumed command of the Pasadena in July. The ship’s host community is Eliot, Maine.