There's plenty of material for great movies from both sides of the naval war, and with the modern CGI technology, they would be spectacular. But it seems that most of Hollywood and the country sees the Civil War as purely an infantry war, with maybe some horses and cannons added for effect.
What I didn't like about Sahara and the part where it portrays the fictional CSS Texas is how much it deviated from the book. The first portion of the book concentrates greatly on the Texas and the storyline surrounding it which is far more intriguing than the way they chose to go with the movie.I thought about mentioning Sahara. It's an enjoyable popcorn movie. The Texas is almost completely fictional, of course. There was an ironclad under construction by that name, but it looked considerably different and was never finished. (The caption "Last ironclad to run the blockade" amuses me. Ironclads didn't run blockades; they tried to break them.)
It seems like Hollywood is into films with how man people can we maim and how many things can we blow up? The 23 day saga of the CSS Arkansas would fit right into that genre.