I'm in the process of building my first BFG fleet (Imperial Navy) and I'm a little confused by all the talk of different fleet lists and what ships are and are not allowed - this may be due to the dispersed nature of all the BFG documents? There's obviously the list that comes in the official rules, then I believe there are more ships in the Armada book - are these part of the same list? I've also heard talk of the Battlefleet Bakka list, but am not sure what ships are in these. Additionally, I've seen a pdf floating around on the internet that contains ships I've never heard of, such as the Victory class Battleship - are these official?
I'm assuming that these lists are much like the 40k Codices, in that you cannot mix and match? Is there a consolidated page or document detailing all the different lists and options therein?
One of the main reasons I ask is that I've managed to acquire a very cheap Apocalypse Battleship, but am not sure if it can be used in the same fleet at either the Emp or Ret BBs.
Edit: I've found the Imperial Fleets Alpha pdf as part of the BFG:R set, I'm assuming this list can only be used in BFG:R since some of the ship stats seem different.
Many thanks for any help.
P.S. I've just been re-reading Shadow Point and seen talk of the (now defunct) Majestic Class Super-Carrier; did anyone ever come up with some rules for this?