vIQleS
Muse
- Joined
- Dec 14, 2005
- Messages
- 841
Its researchers generated simulated cellphone transmissions inside two Boeing aircraft. They concluded that the transmissions could create signals at a power and frequency that would not affect the latest equipment, but exceeded the safety threshold established in 1984 and might therefore affect some of the older equipment on board.
http://www.newscientisttech.com/channel/tech/mg18725161.600-cellphones-at-35000-feet.html
One of the few studies to analyse pilots' accounts of systems failure, published in 2001, examined reports filed between 1986 and 1999 to the NASA Aviation Safety Reporting System in the US. It revealed there had been 86 malfunction incidents of some sort traced to passengers using electronic devices inside the cabin; over a quarter of these were attributed to cellphonesDME is a navigation aid used by aircraft to determine their distance from a particular radio transponder en route. So if two passengers were sitting next to each other, one making a call on a CDMA handset and the other on a GSM handset, that could cause interference signals on GPS and DME wavebands.In July 2003 the FAA received a report from a pilot who did not wish to be identified that a Samsung SPH-N300 cellphone, which is equipped with a built-in GPS receiver, caused an aircraft's GPS to lose its signal completely (NASA technical report, March 2004, Evaluation of a Mobile Phone for Aircraft GPS Interference).
The pilot's company managed to repeat the effect in several subsequent flights, in different geographic locations, on different days, and with three different GPS receivers, each using separate antennas. Every time the phone was turned off the interference vanished. Nguyen managed to reproduce the effects in a lab and measured significant interference in the GPS wavebands. It was the first confirmed, independently repeated example of interference between cellphones and flight systems. And the phone wasn't even carrying a call.
I understand the rationale behind banning all phones being switched on. What I object to is being asked to switch off my PDA because the flight attendant thinks it's a phone. Whilst the man opposite fiddling with his laptop that has a modem card sticking out of it remains unmolested. AND the young girl watching a movie on her (wireless enabled) PSP. Thank you Easyjet.
Air crew on one flight found that the autopilot was being disconnected, and narrowed the problem down to a passenger's portable computer. They could actually watch the autopilot disconnect when they switched the computer on.
I think that the utility of mobile communication will (relatively quickly) outweigh the annoyance for most people. Planes are noisy anyway, yes. I use them a lot (and am lucky enough to be in business class quite often). I rarely regard them as places of peace and quiet, despite how the adverts make them look.Hey Acuity, ever wonder why they pass out headsets for people to watch the movie, rather than just blast the damn soundtrack all over the plane?
In what way(s) is talking on the phone more offensive than talking to the person next to them?If some idiot wants to talk on the phone during a flight fine. Just step out on the wing and yak away. Otherwise, shut the hell up. I'm afraid I'd last about 30 seconds before I dunked somebody's phone in a cup of coffee.
In what way(s) is talking on the phone more offensive than talking to the person next to them?
I think that the utility of mobile communication will (relatively quickly) outweigh the annoyance for most people.
...
I'm just about old enough to remember public opinion being pretty opposed to the "scourge" of mobile phones being used in various other public places (such as restaurants, on buses . . .) but opinion seems to have softened steadily as people have decided that their usefulness more than compensates.
No, they suck in all those places, too.Acuity said:I'm just about old enough to remember public opinion being pretty opposed to the "scourge" of mobile phones being used in various other public places (such as restaurants, on buses . . .) but opinion seems to have softened steadily as people have decided that their usefulness more than compensates.
Excellent idea! Like the old smoking and nonsmoking sections. And hopefully the blithering chit-chat section would go the way of the smoking section.Acuity said:Maybe an airline could try "quiet flights" and "use your phone flights", or have a "switch-it-off side" and a "yak-away side" on the same flight, and see which tickets retail for more.