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A lot.
(lemm.ee)
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this post was submitted on 26 Mar 2024
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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?
Not sure of the specific circumstances, but a ship in the water, even with all motors off, doesn't sit still unless you drop the anchor, and even then it can swing on the chain. It would drift with the current, and it would have momentum from wherever it was headed before the power cut out. Unlike a car with brakes. Even if they had power and slammed the engine into reverse, it's not instantaneous. There's just too much mass and not enough friction.
Yea. Didn't realize how hard it is to stop a giant boat. As a electrical engineer we stay away from water and my ignorance shows!
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
Ahhh. I wasn't seeing the full incident. Lost main power they radioed a warning. Backup generation isn't designed to fully stop a huge boat. Life safety systems on board should be operational but it's the problem here is stopping a giant heavy boat...
Backup generation runs the systems on the boat, not the propulsion. They may have had bow thrusters, but without the main engine, there's very little they could have done.