1st airship is Rank 42 now and still sporting 3 Enterprise parts, so don't worry about it. Made the full Invincible II but can't equip the majority of it yet unless I go back to Invincible 1 parts to make space.

Anyway, unlocked SC14 on second SC11 voyage (1st one unlocked SC13) so pretty happy about that, should have the 3rd Airship access very soon