USS Acadia (AD-42) was a Yellowstone-class

Yellowstone class destroyer tender

The Yellowstone-class is a class of four destroyer tenders built by the National Steel and Shipbuilding Company between 1977 and 1982.-Ships:...

 destroyer tender

Destroyer tender

A destroyer tender is a ship designed to provide maintenance support to a flotilla of destroyers or other small warships. The use of this class has faded from its peak in the first half of the 20th century as the roles of small combatants have evolved .Due to the increased size and automation of...

 in the service of the United States Navy

United States Navy

The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U.S. Navy is the largest in the world; its battle fleet tonnage is greater than that of the next 13 largest navies combined. The U.S...

, named after Acadia National Park

Acadia National Park

Acadia National Park is a National Park located in the U.S. state of Maine. It reserves much of Mount Desert Island, and associated smaller islands, off the Atlantic coast...

. She was inactive and in reserve after her 1994 decomissioning at Naval Inactive Ship Maintenance Facility

Naval Inactive Ship Maintenance Facility

A Naval Inactive Ship Maintenance Facility is a facility owned by the U.S. Navy as a holding facility for decommissioned naval vessels, pending determination of their final fate...

 (NISMF), Pearl Harbor

Pearl Harbor

Pearl Harbor, known to Hawaiians as Puuloa, is a lagoon harbor on the island of Oahu, Hawaii, west of Honolulu. Much of the harbor and surrounding lands is a United States Navy deep-water naval base. It is also the headquarters of the U.S. Pacific Fleet...

, Hawaii

Hawaii

Hawaii is the newest of the 50 U.S. states , and is the only U.S. state made up entirely of islands. It is the northernmost island group in Polynesia, occupying most of an archipelago in the central Pacific Ocean, southwest of the continental United States, southeast of Japan, and northeast of...

 under Maintenance Category B, until sunk off Guam during a live fire training exercise Valiant Shield on September 20, 2010.

She was ordered on 11 March 1976, laid down on 14 February 1978 at San Diego, California

San Diego, California

San Diego is the eighth-largest city in the United States and second-largest city in California. The city is located on the coast of the Pacific Ocean in Southern California, immediately adjacent to the Mexican border. The birthplace of California, San Diego is known for its mild year-round...

 by National Steel and Shipbuilding Company

National Steel and Shipbuilding Company

National Steel and Shipbuilding Company, commonly referred to as NASSCO, is a shipyard in San Diego, California and Norfolk, Virginia and a division of General Dynamics. The shipyard specializes in constructing commercial cargo ships and auxiliary vessels for the US Navy and Military Sealift...

, launched on 28 July 1979, sponsored by Mrs.