Live data from Hacker News

MH370 flew as low as 1,500m to avoid detection, says paper

my.news.yahoo.com

51–60 of 118 posts

Re: MH370 flew as low as 1,500m to avoid detection, says paper

#51
post #35
post #27

Honest question. Would it have been possible for the plane to make it to North Korea?

Not without refueling somewhere. They didn't have enough gas to make it too far past Beijing. [0] [0]- http://i.cdn.turner.com/cnn/interactive/2014/03/world/malays...

Actually according to the Washington Post they did have enough fuel for N Korea

http://www.washingtonpost.com/world/new-twist-in-the-hunt-fo...

Re: MH370 flew as low as 1,500m to avoid detection, says paper

#52

Ignoring for the sake of argument the tragedy of hundreds of people getting murdered / kidnapped, this is the most captivating news event we've had in a while.

Russia invading Ukraine wasn't captivating?

Sadly, a country invading the sovereignty of another is not a rare event.

Someone with technical skill to fly a Boeing 777 in such a capacity is the stuff the make movies out of. The slight possibility that the plane has actually landed makes it extremely captivating.

Re: MH370 flew as low as 1,500m to avoid detection, says paper

#53
post #27

Honest question. Would it have been possible for the plane to make it to North Korea?

No, too far away -- the possible flying radius after contact was lost has been pretty well established, and North Korea is well outside that radius. Also, when last detected, they were flying in the opposite direction.

Re: MH370 flew as low as 1,500m to avoid detection, says paper

#54
post #12

> Today, Reuters reports that the last words from the cockpit of missing MH370 – "all right, good night" – were uttered after someone on board had already begun disabling one of the plane's automatic tracking systems.

> Both the timing and informal nature of the phrase, spoken to air traffic controllers as the plane was leaving Malaysian-run airspace could further heighten suspicions of hijacking or sabotage, it said.

I've listened to a fair amount of air traffic control[1] and a phrase like that, especially when signing off of a frequency, is not at all unusual so I don't know why they're focusing on its informality.

[1] thanks to United offering it on one of their inflight entertainment channels

Re: MH370 flew as low as 1,500m to avoid detection, says paper

#55
Would have to be a pretty hardened pilot to take a 777 down to FL 50 and keep her there anywhere except approach.

"Experts said flying a Boeing 777 in such a way would be dangerous, stressing the airframe and possibly causing those on board to be air sick and suffer from spatial disorientation."

This truly meets the definition of incredible. How could you be that good, but then end up crashing the plane? If you are that good, then you are not going to crash that plane.

Re: MH370 flew as low as 1,500m to avoid detection, says paper

#56
post #26

I may be missing something, but this seems like a very misleading headline. The actual article states that the plane "dropped 5,000 feet (1,500m)" and later that the "twinjet descended 1,500m or even lower". This simply means that the plane descended by a relatively small amount compared to 35,000 - 40,000 foot cruising altitudes, not that it was skimming the ground at 5,000 feet.

Yes, noticed this also, but I think the headline was written by someone other than the source of the article. I think the article is meant to say descended 1500m, not descended to 1500m. Nothing in the article body suggests a descent to 1500m, and that would be a very inefficient altitude to fly a big jet.

Re: MH370 flew as low as 1,500m to avoid detection, says paper

#58
post #9
post #3

people install satellite security systems on $200K cars. Couldn't airlines do the same on a $100M plane.

Yes, and they do. For example: https://en.wikipedia.org/wiki/Automatic_dependent_surveillan... https://en.wikipedia.org/wiki/Aircraft_Communications_Addres... These systems were manually disabled.

>These systems were manually disabled.

it isn't a type of the system i was talking about as ability, in flight, to disable a system excludes the system from the "security" category. Just for the sake of example, placing a battery powered device like always-connected satellite phone into unreachable in flight part of the plane (end of wing for example) would be like something alone the lines of "a security satellite system"

Re: MH370 flew as low as 1,500m to avoid detection, says paper

#59
post #30

I'd still bet on ocean crash. Flying low or not, heading across the Bay of Bengal towards land, and you're going to get pinged with military radar.

India claims to not have their military radar on all the time. "Too costly."

That's only for the Andaman and Nicobar islands though which are very far from the mainland. I'd be surprised if there's no 24/7 radar for the mainland.

Re: MH370 flew as low as 1,500m to avoid detection, says paper

#60
post #37
post #21

Earlier quoted context omitted.

Point is a $100 spot device could be added (powered by Li AA's) as a backup system. This would have independent power supply and obviate the "need for cicuit breakers" being accessed. Or something like a lo-jack or whatever. Its completely embarassing to Boeing. Almost as bad as the pilot has a 64mb i phone and the [edit: voice recorders] holds only 2hrs? WTF. An Iphone might not itself survive, but the media allocat…

Yes, but the FDR is designed to survive multi-g impacts - how well would that smart phone survive?

The spot device doesn't need to survive a crash, just needs to send out a GPS ping once every 10 minutes. ie to give a fix on where the crash is would be sufficient.
Post reply on HN