OneOfMany–
The only Civil War-era ships I can think of are the Merimac, Monitor, Cumberland and Sultana. I’m sure there are some other famous ones, but that’s it for me.
SaysMe–
To quote the lottery ad, “You gotta be in it to win it!”
Why don’t you take a turn and host the next one?
frummy in the tummy–
I pretty much gave it away in the post immediately before yours. (Your post followed mine immediately, so I realize you got the answer without my hint.) That, together with the fact that you had named it but just needed to eliminate the “extras”, was good enough to give you the win.