From the Seattle Times:

The company said it will change the MCAS software to give the system input from more than one AOA sensor. It will limit how much MCAS can move the horizontal tail in response to an erroneous AOA signal. And when activated, the system will kick in only for one cycle, rather than multiple times.

'Juuussst a bit light on the sanity checks there, buddy.' Wow.

 

Details from the Seattle Times on how MCAS got through the certification process despite fatal flaws.
https://www.seattletimes.com/busine...-max-system-implicated-in-the-lion-air-crash/

 

My limited understanding of MCAS is that it was designed to maintain the expected effects of 'trim' on the MAX 8 with older models. Trim in this case means being able to have the yoke in a neutral position after the yoke was adjusted to the desired flight vector. The trim was operating incorrectly under MCAS control so a simple trim stability control switch disconnect should have stabilized the flight control.

 

Here's a little feel-good piece of news, apt for the subject of this thread:


https://www.foxnews.com/travel/delt...d-to-learn-pilots-were-a-mother-daughter-team

Passengers on a Delta flight from Los Angeles International Airport last weekend were stunned to learn they were in the hands of a family piloting team — Capt. Wendy Rexon and her first-officer daughter, Kelly Rexon.

 

43MPH winds, 26 foot seas, no engine. Do the math

https://www.latimes.com/world/la-fg-norway-ship-rescue-20190323-story.html

 

43MPH winds, 26 foot seas, no engine. Do the math

https://www.latimes.com/world/la-fg-norway-ship-rescue-20190323-story.html

Maybe I am missing a relevant detail. If the vessel's staibility is not at stake, what is the point in trying to evacuate such a huge amount of people which, as in many cruise ships, tend to be old and in a high percentage, certainly not skilled in just walking the decks of a rolling ship?

Had the chance to watch people being picked from a vessel in rough seas. It is not just the moment but the travel to destination hanging up there. Not an ideal pendulum precisely.

 

Maybe I am missing a relevant detail. If the vessel's staibility is not at stake, what is the point in trying to evacuate such a huge amount of people which, as in many cruise ships, tend to be old and in a high percentage, certainly not skilled in just walking the decks of a rolling ship?

Had the chance to watch people being picked from a vessel in rough seas. It is not just the moment but the travel to destination hanging up there. Not an ideal pendulum precisely.

The way I understand it, they had engine failure, and were at risk of being dragged adrift into nearby rocks.

 

Maybe I am missing a relevant detail. If the vessel's staibility is not at stake, what is the point in trying to evacuate such a huge amount of people which, as in many cruise ships, tend to be old and in a high percentage, certainly not skilled in just walking the decks of a rolling ship?

Had the chance to watch people being picked from a vessel in rough seas. It is not just the moment but the travel to destination hanging up there. Not an ideal pendulum precisely.

That is what I can't figure. While it might be uncomfortable staying aboard, evacuation is many times more dangerous.

I took a safety at sea seminar in Annapolis and they stressed to us how dangerous a rescue can be. It is especially dangerous in a small sailboat Where any open deck area is so close to standing rigging. Basically you have the cockpit area and that is about it.

They told us most boats are still afloat long after the rescue.

 

The way I understand it, they had engine failure, and were at risk of being dragged adrift into nearby rocks.

I see.

 

That is what I can't figure. While it might be uncomfortable staying aboard, evacuation is many times more dangerous.

I took a safety at sea seminar in Annapolis and they stressed to us how dangerous a rescue can be. It is especially dangerous in a small sailboat Where any open deck area is so close to standing rigging. Basically you have the cockpit area and that is about it.

They told us most boats are still afloat long after the rescue.

Same heard here.

 

The way I understand it, they had engine failure, and were at risk of being dragged adrift into nearby rocks.

Seems a safer way to do this like getting a tug out there to at least keep the ship in position. I wonder how far offshore they were?

There is also anchoring. But they would need to be shallow enough to do that @atferrari might be able to tell use the max anchoring depth of a ship that size. There would be additional problems with that kind of wind. The stress forces must be enormous on a ship of that size.


If I had to guess, I would say they were trying to keep passengers happy by getting them off now. They rolled the dice on the hazard of such operation.

That said those big ships are basically not seaworthy without power.

 

There is also anchoring. But they would need to be shallow enough to do that @atferrari might be able to tell use the max anchoring depth of a ship that size. There would be additional problems with that kind of wind. The stress forces must be enormous on a ship of that size.

Yes, enormous.

Have no idea about the maximum possible depth for those beasts. Maximum depth relates to how long the anchor chains are to ensure the catenary has some two or three shackles lying on the bottom. Here, "shackle" means 90 feet of chain (little more than 27 meters). But you know that, SP!

My last vessel, a Panamax bulk carrier, had 9 or 10 shackles in each chain locker IIRC.

Staying at the ancor with heavy swell, I suspect could be madenning for passengers. Experienced that at Bengazi (or Tripoli) twice.

You know, anchoring for refuge, means trying to stay behind a natural protection. It seems they could not even try that. ¿?

Staying adrift in heavy weather offers the risk of your vessel being caught in resonance vis a vis the waves in way. Something I learnt to avoid when handling her in bad weather.

Our navigation law calls the voyage "aventura marítima" for a reason. Oh sí.

 

Here's a very informative article by the bbc of said event:

https://www.bbc.com/news/world-europe-47685595

 

A very harsh sentence for a very stupid stunt:

https://edition-m.cnn.com/2019/06/1...tl-scli/index.html?r=https://edition.cnn.com/

An Indian businessman was sentenced to life in prison Tuesday for a fake hijack threat on a domestic flight in 2017 that resulted in an emergency landing

 

https://www.foxnews.com/travel/air-canada-passenger-dark-empty-plane-alone

When she tried to contact a friend, her phone died. She tried to charge it, but there was no power on the plane. Adams said she found a flashlight in the cockpit and tried signaling out the plane's windows to grab someone's attention.

 

https://www.foxnews.com/travel/air-canada-passenger-dark-empty-plane-alone

Heck around here we have had kids overlooked on school buses. Bus returns to yard and eventually someone (like a worried parent) brings a kid missing to the attention of the school. I would think that could never happen but it does.

Somebody in big trouble at Air Canada.

Ron

 

https://www.foxnews.com/travel/air-canada-passenger-dark-empty-plane-alone

She also tried to get into the cockpit to radio out but she would have had the same issue with power.

Starting an APU is not trivial. A friend is a pilot. He gave me a otur of one of the aircraft he flew one day. Holy crap! It seemed like you needed an advanced degree just to get the APU started. I swear he hit a dozen switches just to get power into the cockpit.

 

Most likely, the poor fella was already dead before he fell...

https://www.nbcnews.com/news/world/...owaway-who-fell-heathrow-bound-plane-n1025371

A stowaway fell from the undercarriage of a jet as it approached Heathrow Airport after a 9-hour flight from Nairobi, landing in a south London garden, police and airline officials said Monday.

 

This is a thread about flying vehicles -- and not wanting to be on one, no?

 

https://news.usni.org/2019/07/02/14-sailors-die-on-secretive-russian-nuclear-submarine

A fire that broke out on a secret Russian submarine has killed 14 sailors, according to a statement from the Ministry of Defense in Moscow.

“On July 1, 14 submariners – sailors – died in Russian territorial waters as a result of inhaling combustion products aboard a research submersible vehicle designated for studying the seafloor and the bottom of the World Ocean in the interests of the Russian Navy after a fire broke out during bathymetric measurements,” read a translation of the statement from the state-controlled Tass news service.