ORIGINAL: GoodGuy
During the Salerno operation, a cruiser got hit by a single "Fritz X", but the ship didn't sink. Other than that single run, I haven't come across info that would prove that more than this one Fritz was employed, but if so, the others had missed and just dropped into the sea.
I've been reading up on this, but to tell you the truth Salerno isn't particularly well-documented (IMHO). However, I do recall several references to ships that were assigned to support the landing being hit by guided bombs. Anyway, I searched the issue briefly, and found this link that details the damage done by the weapons in tabular form: http://www.ausairpower.net/Warship-Hits.html
