Nuke, your idea was great. I just added a little to it. Hope you guys don't mind. The Hunley is a perfect represenative of southern ingenunity.
I think this could be made into a nice looking patch, but the picture of this sub might have to change. Maybe look for a better picture of the sub, something more generic or an outline of the Hunley? Here's an example using Tim Smalley's Hunley
(Maybe your original Nuke would work better)