So cars these days have anti-collision systems. One would think a million dollar boat, with millions of dollars in cargo, approaching a multimillion dollar bridge would have some sort of active sensing system to prevent a collision. That video shows the Dali strolling right into the support. It wasn't a glancing blow, rather it was a direct hit. Either somebody f'd up big time, or major act of sabotage on US territory.

Apparently, the Dali lost all power. Anti collision kind of needs power to work, so having it would not matter regardless

As an electrical engineer I will say there are giant thick sections of code for backup power regarding life safety systems. Generally a backup generator will keep running even if on fire and breaking just to keep power on… backup batteries on even more sensitive equipment provides even more redundancy. Power failure leading to a disaster is a engineering failure.

Yeah, still an utterly disastrous fuck up. Just wanted to point out that collision systems wouldn't matter in this case

Why would a collision detection system not detect a collision? Asking as I know little about such systems. To me a system would include GPS and bridge heights and ship height with radar to alert of tight spots. A bridge could have a sensor from lowest point to measure water height and hence clearance ND broadcast to all ships who must acknowledge before crossing. Why am I a moron on the internet a step ahead of billion dollar operations?

If it has no power, then it can't detect anything. It's like a driver falling asleep

Yes, it shouldn't happen and something clearly went horribly wrong, but well, the one asleep at the wheel isn't going to be detecting things