If you look at both Victorious Opposition and IATD, there is some more mention of the Confederate Navy: When the U.S.S. Remembrance sails into the Gulf of California to show the flag to the Confederates in Guyamas, one of the Rebs' Coastal Defense Battleships (essentially a Pre-Dreadnaught) comes out to see what the carrier and her escorts are up to. The Confederate Pacific Squadron is probably that ship, a light cruiser or two, three or four destroyers (a destroyer division, in other words) and a submarine division (four boats). IATD mentions a number of Confederate Navy ships at Hampton Roads that are laid up-a heavy cruiser is shelling advancing U.S. forces with her 8" guns, and there's probably other cruisers and destroyers laid up-some with battle damage, others due to lack of fuel. Then Sam Carsten's destroyer escort is based out of Mobile, AL on occupation patrol, and that is where the Confederate Naval Academy was-and there are caretaker crews from the USN aboard a number of captured Confederate ships cruisers, destroyers, and subs. The ship's special operation to Cuba has her disguised as a Confederate DE, it should be recalled. The U.S.S. Oregon encounters a Confederate Sub on the surface after the cease-fire, and directs them to the nearest U.S port as well.
The Confederate Navy is probably a limited blue-water force (cruisers and destroyers-with the latter also for ASW, along with some amphibious capability for the Bahamas and Haiti), Coastal Defense/ASW-the latter especially in the Gulf of Mexico and for protection of coastal convoys, and riverine forces.