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mtbmtb

macrumors newbie
Original poster
Sep 22, 2011
13
0
Hello. I took a flight this weekend for the first time with my iPad2 16GB WiFi and it got me thinking as to why there is an Airplane Mode setting? Can someone please help me understand this? What am I missing? Thanks.
 
Basically it turns off any kind of communication from the iPad, as wifi or bluetooth, so it doesn't interfere with the airplane communication service...
 
Basically it turns off any kind of communication from the iPad, as wifi or bluetooth, so it doesn't interfere with the airplane communication service...

It turns off all of the radios so that the device is in compliance with FAA rules.

As a practical matter, these devices do not create interference for aircraft. A significant number of uses fail to turn their phone/tablet to "airplane mode" before flights. Their phones will merrily seek to establish connections to cell towers; planes don't crash because of this.

"Airplane Mode" is useful for any time that you want to shut down all of the devices radios and conserve power.
 
I've often wondered where that myth started - that cellphones can interfere with avionics. I found only one reference, to tests done in a lab in the UK.

Is there scientific proof that cell phones can make planes go haywire? Some. In 2003 the Civil Aviation Authority--the FAA of the United Kingdom--ran tests using simulated cell phone signals in a chamber (not in an actual aircraft) and found problems. In some cases, the compass froze, some instruments displayed errors, and audio communications were difficult to hear due to interference.

Too bad the FAA has never done a follow up study.

Simulated cell phone signals..... Not cell phones
 
As a practical matter, these devices do not create interference for aircraft.

Well crap - you need to get in touch with the FAA immediately. They'd love to hear what you have to say with regard to this matter - it'd be fantastic to rid ourselves of these pesky regulations!
 
It turns off all of the radios so that the device is in compliance with FAA rules.

As a practical matter, these devices do not create interference for aircraft. A significant number of uses fail to turn their phone/tablet to "airplane mode" before flights. Their phones will merrily seek to establish connections to cell towers; planes don't crash because of this.

"Airplane Mode" is useful for any time that you want to shut down all of the devices radios and conserve power.

It's true that most consumer mobile devices don't interfere with aircraft systems, however there are a minority that do. And since it would be too tedious to test every single model of tablet and phone to see if it would interfere with aircraft systems the FAA had to simply ban all mobile devices from operating their wireless systems during flight.
 
The main reason they have you shut off and stow devices is so that A) Maybe you'll pay attention to the safety talk and B) So they don't become projectiles in a bad take off or landing situation.
 
It's true that most consumer mobile devices don't interfere with aircraft systems, however there are a minority that do. And since it would be too tedious to test every single model of tablet and phone to see if it would interfere with aircraft systems the FAA had to simply ban all mobile devices from operating their wireless systems during flight.

What evidence do you have that shows this to be true? The FAA has NEVER studied this. The only study is from the UK and they used SIMULATED cell phone signals, not real cell phones.

This whole thing is a myth, started by poor science. The FAAs electronics genius accepted the UK study because there MIGHT BE a chance of interference, not because there was any proof of actual cell phone interference.
 
What evidence do you have that shows this to be true? The FAA has NEVER studied this. The only study is from the UK and they used SIMULATED cell phone signals, not real cell phones.

This whole thing is a myth, started by poor science. The FAAs electronics genius accepted the UK study because there MIGHT BE a chance of interference, not because there was any proof of actual cell phone interference.

No, there is no proof. Yes, they do do it just in case.
 
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Here's another blurb, this time from the FCC

Since 1991, the Federal Communications Commission (FCC) has banned the inflight use of 800 MHz cell phones because of potential interference with ground networks. This ban requires that in addition to the testing the FAA requires to show non-interference to the airplane systems, an airline would also need to apply for an exemption to the FCC rule before it could allow cell phone use inflight. The FCC proposed modifying this ban in 2004, but subsequently withdrew the proposal based on the comments it received.
 
One more piece from the FAA policy page on cell phones

The Federal Communications Commission (FCC) typically licenses these devices as land mobile devices. The FCC currently prohibits the use and operation of cellular telephones while airborne. Its primary concern is that a cellular telephone, while used airborne, would have a much greater transmitting range than a land mobile unit. This could result in serious interference to transmissions at other cell locations since the system uses the same frequency several times within a market. Since a cellular mobile telephone unit is capable of operating on all assignable cellular frequencies, serious interference may also occur to cellular systems in adjacent markets.
 
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IT's not the radio's in current electronics that's really the problem. The trouble is that they don't know what effect newer radio/aerial/whatever communication technology will have an aircraft navigation. So, it's safer to get them all turned off. Fair enough if you ask me.
 
I'm starting a class action lawsuit against Apple. Not once has my iPhone or iPad transformed into a plane when I switch on Airplane Mode. =(
 
IT's not the radio's in current electronics that's really the problem. The trouble is that they don't know what effect newer radio/aerial/whatever communication technology will have an aircraft navigation. So, it's safer to get them all turned off. Fair enough if you ask me.

The regulation was put in place in 1961....according to the FAA website. They were concerned with radios, not cell phones. They have simply updated the wording since to cover each emerging technology.
 
I'm starting a class action lawsuit against Apple. Not once has my iPhone or iPad transformed into a plane when I switch on Airplane Mode. =(

I thought this too until I realised you had to turn it on and throw it from a height of at least 10 metres. That should kick it into action
 
If they ban cellphones on airplanes, why don't they ban WiFi on them too?

:rolleyes:
 
If they ban cellphones on airplanes, why don't they ban WiFi on them too?

:rolleyes:

In-flight WiFi is provided via a single incoming satellite connection which can be switched off at the will of the flight crew, which is totally different to hundreds of people having outgoing connections with nearby cell towers. Think of it this way - sometimes when you get a huge crowd of people that all have their cell phones switched on (eg. sporting events), it may 'overload' the network in that area and as a result the coverage may not be as reliable as it normally is. While it is yet to be 'proven' (but to be honest, it's a case of better safe than sorry; god forbid the day we lose an aircraft due to interference), it may be possible that the same kind of interference could occur to the instruments inside the aircraft.

However, I would like to point out that this ban is simply related to transmitting devices - devices that send out a signal - which is why cell phones have the Airplane Mode option. The reason why flight crew ask for devices to be completely turned off for taxi, take off and landing is nothing to do with interference at all; it's so the passengers pay attention to the safety demonstration, and so they are more attentive in the event that a sudden evacuation is necessary (hence why electronic devices can be used after the seat belt sign has been dimmed).
 
In-flight WiFi is provided via a single incoming satellite connection which can be switched off at the will of the flight crew, which is totally different to hundreds of people having outgoing connections with nearby cell towers. Think of it this way - sometimes when you get a huge crowd of people that all have their cell phones switched on (eg. sporting events), it may 'overload' the network in that area and as a result the coverage may not be as reliable as it normally is. While it is yet to be 'proven' (but to be honest, it's a case of better safe than sorry; god forbid the day we lose an aircraft due to interference), it may be possible that the same kind of interference could occur to the instruments inside the aircraft.

However, I would like to point out that this ban is simply related to transmitting devices - devices that send out a signal - which is why cell phones have the Airplane Mode option. The reason why flight crew ask for devices to be completely turned off for taxi, take off and landing is nothing to do with interference at all; it's so the passengers pay attention to the safety demonstration, and so they are more attentive in the event that a sudden evacuation is necessary (hence why electronic devices can be used after the seat belt sign has been dimmed).

I get it now. We need more people like you here on Macrumors :)
 
It would make little sense that airports have implemented severe enough secure measures to cause long screening delays, make us remove our shoes, require us to surrender beverages, grooming accessories and nail clippers if all that's required to take down a plane is a cell phone.
 
It would make little sense that airports have implemented severe enough secure measures to cause long screening delays, make us remove our shoes, require us to surrender beverages, grooming accessories and nail clippers if all that's required to take down a plane is a cell phone.

There is absolutely NO evidence that cellphones interfere with avionics. The UK test was NOT done using actual phones, it was done using simulated cellphone signals.

The FAA actually has procedures on their website for airlines that want to allow personal electronic devices (PEDs) to be used in flight - to test for any interference. They appear to be pretty convoluted, but they still do not get past the fact that the FCC does not license cellphones for use in the air, only on the ground, and the FAA cannot override the FCC here...
 
The regulation was put in place in 1961....according to the FAA website. They were concerned with radios, not cell phones. They have simply updated the wording since to cover each emerging technology.

You should present your case before the FAA and get the rules changed.

"If it please the panel, I seriously did like 15 minutes of google research, I really and honestly know what I'm talking about better than you!" I'd put it in a really condescending tone, that way they know for sure that you mean business.
 
Think of it this way...do you really want to sit on a plane cross country, let alone crossing an ocean, and listen to over 200 people talking on their cell phones?
 
You should present your case before the FAA and get the rules changed.

"If it please the panel, I seriously did like 15 minutes of google research, I really and honestly know what I'm talking about better than you!" I'd put it in a really condescending tone, that way they know for sure that you mean business.

Read the FAAs own website. They have no data. Everything is total speculation. They even have documented processes to let each airline ferrule the FAAs regulations.

Hardly a case for "We have done exhausting tests and here is what we discovered."

Even the FCC statement is based on pure speculation that there might be issues with ground stations. Their own wording says they have also done no testing, just total speculation and concerns without any testing.

I guess that's enough for you, but in my job, speculation is not enough to set policy.
 
Think of it this way...do you really want to sit on a plane cross country, let alone crossing an ocean, and listen to over 200 people talking on their cell phones?

Last I knew there were no cellphone towers in the oceans.... Next time you are on a trans oceanic flight, take your phone off airplane mode and see if you get a signal...

I don't disagree that having a plane full of people on the phone would be annoying, but if you are going to ban a technology because it's annoying, don't hide behind safety.

Tell the truth. We are adults. We can handle the truth.
 
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