Battle Bunker Games has a Kickstarter campaign up and running for Seas of Iron: Rising Sun. They’ve already made it to 50% funded in just the first couple days.
From t he campaign:
Seas of Iron: Rising Sun is the first expansion for the popular battleship combat game Seas of Iron. Rising Sun is a stand alone game that is also 100% compatible with Seas of Iron. The new game includes the addition of Aircraft Carriers, Fighters and new crew members.