Aircraft engineer: there's no risk. From an employee of the most famous company that makes major airliners. (He asked not to name the company, but you're free to guess):
Interestingly, I had a conversation about this matter a few weeks ago with a co-worker who is an engineer. I was in Europe, and we were discussing the differences between US and European airlines on what was allowed and what wasn't (e.g. Europe: no cell phones, even on the ground, but bluetooth away. US: no bluetooth ever, but cell phones as soon as the wheels hit the runway). His comment:
"the real truth to all this the amount of shielding used on modern commercial jets pretty much guarantees that there is no real interference by any of these devices."
Flight attendant: you're making our life worse. To the opposite effect, from a former flight attendant of a major airline that was originally part of the company mentioned above. You can figure this out if you try.
As former flight attendant and the partner of a flight attendant I am completely surprised [by my argument]. As a pilot you should understand the interdependence of aviation safety, that safety in one area of flight affects all others. So why did you have to make my girlfriend's job even more difficult, and potentially more dangerous? Every day flight attendants ask passengers to turn off their electronic distractions for just a few minutes, and its for exactly the reason you stated:
"If anything went wrong on a crowded airline flight, the flight crew would need everyone's full attention, now. The prevailing theory is that passengers are less likely to be distracted if they're not cocooned by their acoustic headsets or distracted by their iPads."
Getting people to disconnect for just a few minutes (for their safety and the safety of others) is already a major chore. You are already allowed to have you cell phone on after you leave the runway and move to taxiway, which in and of itself is pretty amazing because of the greater risk of collision there. With the ever increasing prevalence of electronic distractions being brought aboard, the potential effect during an evacuation is getting worse.
Even better that you should post this right before the holidays when families with young ones are more often traveling. Have you ever tried to pull an 13 year old boy away from a video game? Even if a naked woman should walk by I doubt he would notice, let alone the aircraft needing to be evacuated. It is not just kids though. In every evacuation crew members have reported passengers often attempting to take their belongings with them, further endangering everyone. I can just see someone fumbling with their bag (worried that junior gets his gifts this christmas), bose earmuffs installed and going the wrong way during an evacuation. Even more worrying is that even though you may fly in "38F" very often the demographic that reads The Atlantic sits in "1A." It is in first class that flight attendants encounter more attitude over safety then any other place on the plane. I know we needed another jerk thinking, "well I paid extra so I can do whatever I want, and if James Fallows thinks its silly then I do too."
I realize that you said you would be following the rule, but your article promotes a cavalier attitude toward this matter, undermining the authority of the crew, who only wants to get home safely. [JF: In fact, I think they would have more authority if they didn't have to enforce nonsensical rules.] Even if one could careless for yours and other's safety, following crew member instructions is the law.
Tech-aviation veteran: It's a matter of anomalous bad design. This note comes from Curtis Sanford, a tech-world official and president of COPA, the Cirrus Owners and Pilots Association, of which I am a charter member. It was a Cirrus SR22 in which I was flying, at some points with an 80-knot tailwind that led to groundspeeds of nearly 300 miles per hour, from South Carolina to Maryland today.
I guess I'm going to have to chip in with COPA's contribution. You may not recall, but in our forums there were multiple reproducible reports of cellphones completely knocking a GPS offline. The specifics I believe were all Sprint PCS phones, and in fact I believe a single Korean brand of phone.
I believe what was happening there was a combination of a badly designed
phone being used in a location in the plane that was close to a comms
antenna cable (the GPS2 antenna cable in those planes ran right by the
passenger's right pocket). The potential for poorly designed equipment
raises the possibility of any equipment, even without transmit
capability generating GPS interference.
That leads to the
infamous case of the Moss Landing GPS interference. Back in around 2000
something started jamming GPS signals in Moss Harbor, California, to the
point that ships could not come into the harbor in the fog due to
signal integrity loss. A research team based there conducted an
extensive search for the cause, eventually find it to be a cheap
Taiwanese RF [radio frequency] remodulator for a TV set. (story here.)This
shows that any RF-utilizing equipment, which would
certainly include all gadget electronics, has the potential to be
misdesigned to emit GPS-jamming signals.
So for me that is a good
enough reason to be willing to carry on my paper copy of the Atlantic
(I SUBSCRIBE!) for reading during takeoff and landing.
AM radio receivers can't hurt. And from a reader who challenges the claim's by yesterday's pilot-engineer:
I would like to point out the implausibility of your pilot reader's assertion that an AM radio interfered with his instruments. As I'm sure we all know, an AM radio only receives incoming signals and them minimally amplifies sound for the earphones. Unlike cellular phones, It does no transmitting whatsoever. There are a multitude of airports all over the word where aircraft routinely pass through radio signals and electromagnetic fields that are orders of magnitude more powerful than a portable AM radio in the passenger seat with no ill effects. [JF: And, again, aircraft must be certified to withstand a bolt of lightning and still function.] There may be a reasonable case to be made against transmitters in the passenger compartment that, especially in aggregate, may cause enough interference, but anyone claiming a receiver is responsible for diverting a flight is frankly not thinking very critically about the issue.
This is an anecdotal argument from an expert-sounding source who does not possess the necessary understanding of the principals involved to give an informed opinion.
Much more to come from the mailbag. Thanks to all. And, yes, I had my T-Mobile cellphone, and my Foreflight-equipped iPad, turned on throughout my Cirrus flight today. The only navigation problem I had was the predictable one that happens when passing over the huge concentrations of antennas in Annapolis and around the Patuxent Naval Air station, which at least in my airplane sometimes lead to momentary "navigation source lost" alerts.