It's like the Abyss Battleships redirect fire to their subordinates. You're shipgirls will not target them otherwise.

Nothing wrong with the petty A-rank.

Unless you're trying to farm something.

That Ru looks a lot less pale than Abyssals tend to be drawn...

I blame, Flagship Protection.

Just take the win and be happy, Bono.

So, you take the battleship, Bono? You have to take them all out for an S-rank.