Originally posted by: RagingBITCH
Originally posted by: slick230
Originally posted by: bsobel
Originally posted by: upsciLLion
Cell phones generate EMI which could potentially interrupt the normal functioning of the aircraft's electronics. Having people not use them on flights is more than a courtesy issue.
Actually that has never been proven. The main reason for the requirement is from the air your phone can reach many more towers than it can from 'ground level' and is moving much faster than the cell systems are designed to handle.
Bill
So why would the FAA care if your cellphone's carrier can't keep up with your signal? :roll:
Actually Bill is only partially correct. The reason it's banned b/c cell phones at high altitudes will try to connect with many base stations at once, which risked overloading the network for the people on the ground. (3G phones were designed to help stop this problem though)
The FCC is actually the one which banned cell phones from airplanes back in 1991, before cell phones were ever really prevelant in society. The FAA just "supports" their decision.
http://zdnet.com.com/2100-11-501431.html?legacy=zdnn
http://www.wired.com/news/business/0,1367,41273-2,00.html?tw=wn_story_page_next1
Two articles over the subject. I've found other articles about the overloading of base stations but none of them are "big name" sites so to speak. It's not necessarily the FAA that cares - it's because of paranoid idiots and the media who falsely claim that cell phones interfere with plane equipment. It's the miseducation of the public. That and airlines get a fat cut from pay-per-use phones in airplanes.
My mother works in the aerospace industry. While it is true that it is incredibly unlikely that cell phone transmissions would directly interfere with airplane operations, it is a possibility. The issue is that cell phones automatically increase/decrease the amount of signal output based on the distance to the nearest cell tower. On a plane that signal output increases dramatically, since the distance is great. Because of diffusion and the frequencies cell phones operate on it is theoretically possible for a cell phone to disrupt equipment on an airplane.
For any of you who doubt this, make a call on your cell phone and put it next to an active stereo somewhere where your reception isn't so good. You hear that buzzing coming from the speaker? Imagine it doing that to airplane equipment.
Now true, most airplane equipment is heavily shielded, and the only equipment that is particularly vulnerable to that type of interferrance are non-essential things, but it could interfere with stuff like GPS equipment, etc. which while not vital could seriously inconvenience the pilots.
Anyway, apparantly some British airlines have come up with an interesting solution to the problem: put a miniature cell tower on the airplane. That way all the signals from onboard cellphones go to the local minitower, not ones on the ground. The signals between the minitower and ground towers would be transmitted via a directed antenna or antennae, which would be directed so as not to have any potential to disrupt plane operations. I'm thinking this will catch on here; then the FAA won't be able to stop us from yakking away on planes anymore. YAY!