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Air traffic system failure caused by computer memory shortage

reuters.com

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Re: Air traffic system failure caused by computer memory shortage

#41

Post by a3n »

joezydeco wrote: post #38
ars wrote: post #15

Earlier quoted context omitted.

> flying the most stealthy plane A U2 is not at all stealthy. You must be thinking of some other plane. > if you have to register a flight plan It's not a military operation in a foreign country, it's a routine flight in the home country. > I thought such a plane would be 100% autonomous The U2 was made long before such computers existed. They do have drones now. > and be able to "see" and avoid other planes. It wasn…

"It's not a military operation in a foreign country, it's a routine flight in the home country" Is it worth asking, at all, why we're flying a military reconnaissance aircraft back-and-forth over Los Angeles?

Atmospheric studies? Training in commercial environments? To see what happens? Because they can? Sekrit stuff?

If there's an actual military mission for any military plane that requires it to fly over or through a commercial area, wouldn't you prefer that pilots and ground operators already know how to do that?

Re: Air traffic system failure caused by computer memory shortage

#42

Post by andreasvc »

khuey wrote: post #40
andreasvc wrote: post #19

Earlier quoted context omitted.

It's not the most stealthy plane on earth, in fact it has been shot down over the Soviet Union and China in historical cases, because of being tracked by radar. Moreover it was flying over American airspace, it makes sense to register it.

The second U2 was shot down by Cuba, not China.

There were also five U-2 planes shot down over China: http://en.wikipedia.org/wiki/Lockheed_U-2#Taiwan_.28Republic...

Re: Air traffic system failure caused by computer memory shortage

#43

Post by colanderman »

A perfect example of why embedded or safety-critical systems should never dynamically allocate memory from a common pool.

Such systems should always preallocate fixed-size heapsfor each subsystem, each of which can then dynamically parcel out pieces of their own heaps if necessary. This helps limits the damage of any memory leaks in the system.

Re: Air traffic system failure caused by computer memory shortage

#44

Post by Daviey »

cstross wrote: post #34
makomk wrote: post #33

Earlier quoted context omitted.

One presumes they still need to know the location of those flights to deal with them descending into the range of altitudes used by commercial aircraft.

No commercial aircraft operate at such altitudes. No, seriously: you run out of air for air-breathing engines above FL600 (the SR-71 flew at FL800 very fast indeed partly because it needed to go like a bat out of hell to keep enough airflow through its engines: and because it was able to go that fast due to there not being much air up there to produce drag), and the turbofans used on commercial airliners rapidly run…

Funnily enough, I understood UK ATC service was provided to FIR FL245, with basic service UIR FL660.

Re: Air traffic system failure caused by computer memory shortage

#45

Post by khuey »

andreasvc wrote: post #42
khuey wrote: post #40

Earlier quoted context omitted.

The second U2 was shot down by Cuba, not China.

There were also five U-2 planes shot down over China: http://en.wikipedia.org/wiki/Lockheed_U-2#Taiwan_.28Republic...

Interesting. I wasn't aware that the ROC ever operated U-2s.
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