Here is what was released in July by the NSA...
http://www.nsa.gov/docs/efoia/released/liberty.html
They are all transcripts after the attack, not prior to or during.....
They do not (imho) prove an accident....
The Liberty incident is one of those, like the Kennedy assasination that we will probably never have the full story on...
If it was truly an accident the official stuff would have been out pretty quickly and would not have to be forced out 36 years after the fact by freedom of inforrmation act filings.....
Still, it might have actually been an accident... Like us bombing the Chinese Embassy... That was blamed on outdated maps.... Was that fact or was that the story ??