News

23275 readers

3298 users here now

Welcome to the News community!

Rules:

1. Be civil

Attack the argument, not the person. No racism/sexism/bigotry. Good faith argumentation only. This includes accusing another user of being a bot or paid actor. Trolling is uncivil and is grounds for removal and/or a community ban. Do not respond to rule-breaking content; report it and move on.

2. All posts should contain a source (url) that is as reliable and unbiased as possible and must only contain one link.

Obvious right or left wing sources will be removed at the mods discretion. We have an actively updated blocklist, which you can see here: https://lemmy.world/post/2246130 if you feel like any website is missing, contact the mods. Supporting links can be added in comments or posted seperately but not to the post body.

3. No bots, spam or self-promotion.

Only approved bots, which follow the guidelines for bots set by the instance, are allowed.

4. Post titles should be the same as the article used as source.

Posts which titles don’t match the source won’t be removed, but the autoMod will notify you, and if your title misrepresents the original article, the post will be deleted. If the site changed their headline, the bot might still contact you, just ignore it, we won’t delete your post.

5. Only recent news is allowed.

Posts must be news from the most recent 30 days.

6. All posts must be news articles.

No opinion pieces, Listicles, editorials or celebrity gossip is allowed. All posts will be judged on a case-by-case basis.

7. No duplicate posts.

If a source you used was already posted by someone else, the autoMod will leave a message. Please remove your post if the autoMod is correct. If the post that matches your post is very old, we refer you to rule 5.

8. Misinformation is prohibited.

Misinformation / propaganda is strictly prohibited. Any comment or post containing or linking to misinformation will be removed. If you feel that your post has been removed in error, credible sources must be provided.

9. No link shorteners.

The auto mod will contact you if a link shortener is detected, please delete your post if they are right.

10. Don't copy entire article in your post body

For copyright reasons, you are not allowed to copy an entire article into your post body. This is an instance wide rule, that is strictly enforced in this community.

founded 1 year ago

MODERATORS

[email protected]

124

NTSB releases report on Baltimore bridge collapse (www.cnn.com)

submitted 6 months ago* (last edited 6 months ago) by [email protected] to c/[email protected]

11 comments fedilink hide all child comments

https://www.ntsb.gov/investigations/Pages/DCA24MM031.aspx

https://www.ntsb.gov/investigations/Documents/DCA24MM031_PreliminaryReport%203.pdf

Power outage is on page 9.

Summary of that section*:

Around 0125, the vessel Dali experienced a critical electrical failure about 0.6 miles from the Key Bridge. Two electrical breakers tripped, causing a blackout that disabled shipboard lighting, equipment, main engine cooling water pumps, and steering gear pumps. Although generators 3 and 4 continued to run, the main propulsion engine shut down due to the loss of power to necessary pumps, and the vessel lost steering capabilities.

At 0126, the voyage data recorder (VDR) resumed recording data, indicating the ship's heading and course had slightly changed, and speed had decreased. The senior pilot, having taken control, ordered a 20° port rudder, and the emergency generator started, providing limited power for emergency equipment, including a slow-moving emergency steering pump.

The crew manually restored power by closing the tripped breakers, but at 0.2 miles from the bridge, a second blackout occurred. The emergency generator maintained power to emergency systems, and generator 2 automatically started, restoring power to the HV bus. The senior pilot ordered the rudder hard to port at 0127:23, but the lack of propulsion hampered steering efforts. Despite the crew regaining electrical power before the ship struck the bridge, they were unable to restore propulsion.

*This summary was created using ChatGPT-4o

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 2 points 6 months ago

That was fast