Battleships may have difficulty locking them. If you needed it am sure you could position dessies or other small ships just outside the edge at certain locations. if the break the rule they can start engaging alot faster than the battleships in the center. larger ships can be left to the BS.
Be it this would require a much larger team of maybe an additional 4-5 players. but if you need it am sure people will volunteer. I would volunteer to give you a hand next time if i get put out early and in between if you need it if you decide to go ahead with it.