Thanks for the link to the track. That's the first thing that I've seen that showed that I guess it's regular for these ships to pass under the center of this bridge. Is that correct?

If so, what I'm still not understanding is why ships are allowed to make that passage all on their own without any backup like a tugboat and why the bridge doesn't have secondary protection of its pillars. Because with a track like that and lack of either of those things, a catastrophic collision seems inevitable.

Does anyone know why the ship would make a sudden hard right during a sequence of power failures?