The address of the National Archives facility to which Larry refers is:
National Archives II
8601 Adelphi Road
College Park, MD 20740-6001
You will specifically want to contact the Modern Military Records Unit, telephone 301-837-3510.
If you live reasonably close to College Park (which is a suburb of Washington, DC) you can do research in person, possibly saving time and expense over whatever time it would take Archive staff members to find, photocopy and mail the information of interest to you. See www.archives.gov/dc-metro/college-park/researcher-info.html.
Ron Carlson, Webmaster
Armed Guard / Merchant Marine website