The USS San Marcos (LSD-25) was a Casa Grande-class dock landing ship the United States Navy, laid down on 1 September 1944 at the Philadelphia Navy Yard, launched on 10 January 1945, and commissioned on 15 April 1945 with Commander L. E. Ellis in command. The ship served in the United States Navy from 1945 to 1970. In 1971, the vessel was loaned to the Spanish Navy as Galicia (TA31), before being outright transferred in 1974. In 1980, the vessel's pennant number was changed to L31. It was stricken from the Spanish Navy list in early 1988 and scrapped in 1989. When asbestos fibers are disturbed, they become airborne and may be inhaled or swallowed. Anyone who worked aboard the USS San Marcos (LSD-25) or was engaged in its rehabilitation should be on the lookout for indications of asbestos-related illnesses and should see a doctor as soon as possible if they develop any symptoms. Even though the Navy established a directive prohibiting the use of asbestos on ships in 1975, many veterans had already been exposed to the deadly substance.