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Fliers Must Turn Off Devices, but It’s Not Clear Why

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61–70 of 301 posts

Re: Fliers Must Turn Off Devices, but It’s Not Clear Why

#61
post #27

Yes, absolutely turn off all devices. We know with certainty that ANY transmitter can cause terrible havoc with the plane's electronics. Unless you're paying the ripoff $10 fee for in-flight Wifi, then the dangers are magically avoided.

You are right, testing is magical

Re: Fliers Must Turn Off Devices, but It’s Not Clear Why

#62

Easily the most annoying part of flying for me, particularly when doing a quick flight from SFO to LAX is the insistence that I turn off my Kindle while we are lining up for the runway. * People reading newspapers, and books - both of which are larger, heavier, and just as distracting, and in the case of newspapers, a greater obstacle - are not told to put away their reading material - so the argument that "people ne…

How do we know there isn't a bug in a device's airplane mode?

Re: Fliers Must Turn Off Devices, but It’s Not Clear Why

#63
post #50
post #27

Yes, absolutely turn off all devices. We know with certainty that ANY transmitter can cause terrible havoc with the plane's electronics. Unless you're paying the ripoff $10 fee for in-flight Wifi, then the dangers are magically avoided.

Most inflight wifi systems give you a 30 minute free trial and deleting your cookies can usually bypass that restriction.

Yes, specifically you should target the cookie that contains your MAC address ;)

Re: Fliers Must Turn Off Devices, but It’s Not Clear Why

#64
post #27

Yes, absolutely turn off all devices. We know with certainty that ANY transmitter can cause terrible havoc with the plane's electronics. Unless you're paying the ripoff $10 fee for in-flight Wifi, then the dangers are magically avoided.

There's a big difference in power levels between wifi (that only has to go a few hundred feet to the on-plane transceiver) and cell phone radio (that has to go possibly several miles to a ground tower). Additionally, GSM has a transmission pattern that can cause noise in radio receivers and other audio devices - just try holding an active GSM phone up against a poorly shielded speaker sometime!

Re: Fliers Must Turn Off Devices, but It’s Not Clear Why

#65
post #11

MythBusters covered this awhile back, and busted the myth: "The final explanation is that, even though the airplanes appear to be well-shielded against cellphone interference, there are so many different electronics in a cockpit, as well as so many different cellphones constantly coming out, the FAA doesn't want to do the necessary testing."[1] [1] http://kwc.org/mythbusters/2006/04/episode_49_cellphones_on_...

If they actually aren't willing to test whether cell phones interfere with their equipment, they shouldn't be allowing cell phones on the plane at all. Relying on people's compliance (or even just their attention) to ensure the plane doesn't explode is absurd.

There are other options than "allow free cell phone use" and "frisk all passengers to ensure they're not smuggling in an active cell phone". Asking passengers not to use them is a decent compromise between safety and inconvenience. Naturally, if a crash were to actually occur due to mobile phone use, the FAA would need to revisit this guideline.

Note that GSM phones in particular _do_ interfere with radio systems - that irritating buzz you hear when a GSM phone is near a speaker amplifier can affect airplane systems as well (although it depends on where the phone is on the plane, of course). There can also be interference with _ground_ systems - cell networks aren't designed to deal with the rapid tower transfers caused by ultra-high-altitude phones moving at Mach 0.85.

Re: Fliers Must Turn Off Devices, but It’s Not Clear Why

#66
post #8

There is actually a very logical, sensible reason to have everyone power off and stow their devices during takeoff and landing, and this story disappointingly failed to cover it: By far the most likely time for any accidents or incidents to occur is during takeoffs and landings. If everyone has 15 objects out and is busily typing away, it's going to be tht much more difficult for flight attendants to get everyone's a…

As the author of the piece, I have to disagree with you. First, the F.A.A. never used this as a reason when I spoke with them for my story. Second, if that were the case, then why are people allowed to read books, magazines, and play crossword puzzles on paper? Reading a book on a Kindle will not cause more distraction during an emergency than reading one on paper. Thanks, Nick Bilton.

Hi Nick:

Regardless of what the FAA says, my reason is still valid. It is also not really in conflict with what you're saying...you're right that it's not really consistent since folks are still allowed to read books, but that doesn't invalidate my point either.

I would point out that people are not really as likely to take a crossword with them in an emergency as they would be a computer.

Also, you're frankly wrong in asserting that electronic devices are not more distracting than a paper book; think of anything involving headphones, for instance.

Re: Fliers Must Turn Off Devices, but It’s Not Clear Why

#67

The last time I flew, most of the people around me didn't know the difference between "airplane mode", "standby", and "off". I'd bet that at least 80% of the phones on that flight were full on despite the efforts of the crew and the device's owners. Everyone turning off everything successfully before takeoff is pure fiction.

Cell phone transmissions are much less frequent when the phone is idle than when it is in active use. Even if people just stop talking on the phones, it's better than nothing.

Re: Fliers Must Turn Off Devices, but It’s Not Clear Why

#68

Easily the most annoying part of flying for me, particularly when doing a quick flight from SFO to LAX is the insistence that I turn off my Kindle while we are lining up for the runway. * People reading newspapers, and books - both of which are larger, heavier, and just as distracting, and in the case of newspapers, a greater obstacle - are not told to put away their reading material - so the argument that "people ne…

How do we know there isn't a bug in a device's airplane mode?

How do we know there isn't a bug in a device's off switch? Most of them are software-based these days.

Re: Fliers Must Turn Off Devices, but It’s Not Clear Why

#69
post #42
post #8

There is actually a very logical, sensible reason to have everyone power off and stow their devices during takeoff and landing, and this story disappointingly failed to cover it: By far the most likely time for any accidents or incidents to occur is during takeoffs and landings. If everyone has 15 objects out and is busily typing away, it's going to be tht much more difficult for flight attendants to get everyone's a…

Your response is an example of the natural tendency of some people to find comfort in authority, even when it is shown to be ineffective. Nothing personal. Lots of people react in the same way. Sad nonetheless.

Not really. It is an example of me reading an Ask The Pilot column, on Salon, in which this topic was discussed, and finding myself in agreement with the reasonable points made therein, by an actual pilot.

As far as authority goes in general, and the FAA in particular, I think the FAA and Homeland Security are utterly full of it, most of the time. This issue is more evidence of that; I agree with those who point out that there is no reason to power off devices. Just pointing out that there is indeed a valid reason to want folks to put them away. Especially anything involving headphones.

Re: Fliers Must Turn Off Devices, but It’s Not Clear Why

#70
post #30

Here's what I don't understand, and admittedly I have very little knowledge of the industry. There seems to be some sort of approval process for electronics to be vetted during takeoff and landing. Several in-chair entertainment systems seem to have this rating/designation and are allowed during takeoff/landing. So, is there no dollar amount that could be paid to properly test a particular product? Let's say the Kind…

I currently work in developmental flight test. Any time we add a new piece of electronics to an aircraft (or replace an existing piece with a new version), be it a radio, a computer, or test instrumentation, we have to conduct an Electromagnetic Compatibility (EMC) Safety of Flight Test (SOFT) to make sure that the new equipment does not interfere in any way with avionics that are critical to safety of flight. Even i…

Could you explain to what degree incidents of unexpected interference result in dangerous failure modes? Is that sort of follow-up analysis done?
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