Here is what you do. upload the AA rules of whatever version. then Chat Cpb or Genmini upload the rules and it will decide with brutal logic. The Battleship is priced correctly if its 20IPC and takes 2 hits and SB at 4. the only issue might be the Carrier could have different combat values, otherwise its good. Let AI solve your issue!
Corvette
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I originally designed this unit independent of any other source in the 1980’s when there was only A&A Classic available.
Corvette: move 2 (or 3*) Attack value = 1 and Defence value = 1. Cost is 6 PF.
(* For my A&A variant game & map I give Naval Units a move of 3)
(** I added the Corvette to compliment the original naval units of BB: Att 4 Def 4 +24 PF, Cr: Att 3 Def 3 +18PF & DD: Att 2 Def 2 +12 PF & the CV being Att 2 Def 2 +18 PF plus may carry 2 Fighters OR 1 Bomber)