No CD Walkmans allowed at any time during a flight . . . .
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Join Date: May 2004
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No CD Walkmans allowed at any time during a flight . . . .
but laptop pc's and Walkman cassette players are ok.
What is it about "CD ROM reading devices" that causes problems?
Thanks.
What is it about "CD ROM reading devices" that causes problems?
Thanks.
It is possible for a device to have any manner of frequencies generated internally. And if one model of unit does it, then how do you distingish between that and others?
So all must be banned. For instance, in the news recently there was the TV that emitted signals on 121.5 leading to a search and rescue finding the man alive and well in his house.
"aircraft safe" or "aircraft mode" devices don't really help because all that does is cause the cabin crew more workload and require training to identify if a unit is in 'aircraft mode" or 'aircraft safe". I certainly wouldn't ask my crews to endure that - if my name were RealAirlineMogul.
Electronic interference is an extremely tricky beast; this is why it probably hasn't been determined to cause trouble one way or the other. But under the right cirumstances interference is definitely possible.
I'm still surprised that one day I was working er, playing with a microphone amplifier and quite clearly picked up an AM radio station in Quebec!!!!! Turns out the the unqiue configuration of cable coils in the floor enabled this to happen.
Of course, I am not RealElectronicEngineer either, I just have lots of friends who are. And aircraft systems interference/electronics are always a favorite topic of discussion on a friday night.
Since I am RealComputerScientist, I will say that proving interference will or won't occur (in the mathimatical sense) is probably a futile task.
So all must be banned. For instance, in the news recently there was the TV that emitted signals on 121.5 leading to a search and rescue finding the man alive and well in his house.
"aircraft safe" or "aircraft mode" devices don't really help because all that does is cause the cabin crew more workload and require training to identify if a unit is in 'aircraft mode" or 'aircraft safe". I certainly wouldn't ask my crews to endure that - if my name were RealAirlineMogul.
Electronic interference is an extremely tricky beast; this is why it probably hasn't been determined to cause trouble one way or the other. But under the right cirumstances interference is definitely possible.
I'm still surprised that one day I was working er, playing with a microphone amplifier and quite clearly picked up an AM radio station in Quebec!!!!! Turns out the the unqiue configuration of cable coils in the floor enabled this to happen.
Of course, I am not RealElectronicEngineer either, I just have lots of friends who are. And aircraft systems interference/electronics are always a favorite topic of discussion on a friday night.
Since I am RealComputerScientist, I will say that proving interference will or won't occur (in the mathimatical sense) is probably a futile task.
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Cheers for that "FakePilot"
I didn't mind not being able to listen to music - it was an overnight from LGW to JHB, so no problem.
Just curious because they were so specific about "CD ROM reading devices"
Maybe one day they'll set a herd of Cray's the task of calculating out the problem?
:-)
I didn't mind not being able to listen to music - it was an overnight from LGW to JHB, so no problem.
Just curious because they were so specific about "CD ROM reading devices"
Maybe one day they'll set a herd of Cray's the task of calculating out the problem?
:-)
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It seems nothing is safe (from my CRM course notes):
"radiations from TVs and radios come within the VOR and ILS regions as well. Here are some other examples:
On an MD 87, failures in flight mode annunciator No 2 occurred while two video cameras were being used in the cabin. On another one, an uncommanded change of modes in the flight management system occurred when a CD player was used
On a DC 10 (as it was then), there were ADF bearing discrepancies when two Gameboys were being used
On a 727, coming down the ILS, between 2000-3500 feet, the flight director vertical bar and localiser needle both moved to the left when someone used a cellular phone
On an MD 80, the wrong flight level was captured when another used an FM digital receiver
A 747-400 started oscillating left and right of track as two passengers were using laptop computers"
Phil
"radiations from TVs and radios come within the VOR and ILS regions as well. Here are some other examples:
On an MD 87, failures in flight mode annunciator No 2 occurred while two video cameras were being used in the cabin. On another one, an uncommanded change of modes in the flight management system occurred when a CD player was used
On a DC 10 (as it was then), there were ADF bearing discrepancies when two Gameboys were being used
On a 727, coming down the ILS, between 2000-3500 feet, the flight director vertical bar and localiser needle both moved to the left when someone used a cellular phone
On an MD 80, the wrong flight level was captured when another used an FM digital receiver
A 747-400 started oscillating left and right of track as two passengers were using laptop computers"
Phil
