Aircraft Carrier Survival was just released on Steam. It appears to have been made by the same people who gave us the excellent, "Uboat", which I love.
So I bought it as soon as I received the e-mail. In the videos, there are submarines. What that has to do with the player, I don't know. They may just be enemies after your carrier.
But, maybe they're part of the CBG. Controllable? I don't know yet. But I'll report back when I know more about this brand new title. Downloading now.