High Quality Content by WIKIPEDIA articles! PCU San Diego (LPD-22), a San Antonio-class amphibious transport dock, is the fourth ship of the United States Navy to be named for San Diego, California. The city is the home of Naval Base San Diego, the Navy`s largest base in the Pacific, and Marine Corps Recruit Depot San Diego, the United States Marine Corps` west coast recruit training center. The ship is designed to deliver a fully equipped Marine battalion of 699 officers and enlisted men.