The Bismarck's ant-aircraft guns couldn't go low enough for the lumbering Swordfish which, flying so slow, had all the time in the world to take aim, undisturbed by German fire.
I read that of the ones that did hit them the majority just passed through the 'plane. But it could have been a boys war comic I read it in, it was a long time ago.
IIRC it was also a British navy attack on the Italian fleet/.harbour which inspired the attack on Pearl.
And of course we've all heard of HMS Argus.
