Just another filthy Tommy trick, kamerden.
Put a couple of eels into them and watch them explode because they were full of ammunition.
Remember the Lusitania? Those filthy Tommies always try that one.
PS if you sink them and they really
were hospital ships, surface and make sure you leave no survivors. Strafe every lifeboat, shoot everyone and don't write it up in your log. That way there will be no witnesses to stitch you up at Nuremberg and you can deny everything if Uncle Karl asks you about it.