Have you seen these records as well?, Charles is listed, your dad is probably also listed, it doesn't add much additional information, except for,...his date of birth = February 28th 1917.
Can't beat a bit of documented evidence. :):)
http://search.ancestry.com/search/db.aspx?dbid=2345There's also a Social Security death record which matches that date of birth and the death mentioned in California.
Name Charles Hahne
SSN: 254-28-7125
Last Residence 92640 Garden Grove, Orange, California, USA
BORN 28th February 1917
Died: May 1981
SSN issued in Georgia before 1951
Check out the attached 1949 passenger list.