[Jimbuna]

I'll put it another way and in a hypothetical scenario....modern guided missile warship v Iowa:

Modern warship fires missiles at approaching Iowa who in turn responds with Tomahawk (which more than likely have a far greater range than the missiles from the modern warship) and or Harpoon. CIWS engage both sets of missiles, any getting through to Iowa fail to penetrate thick armour protection but any getting through to modern warship are probably catastrophic therefore game over.

Moving on...Iowa gets within 16" main armament range (21nm)and fires a broadside of nine shells...game over.