To: John Walliker who wrote (16625 ) 9/8/2000 9:21:23 PM From: Maurice Winn Read Replies (2) | Respond to of 29987 But hang on John, if the nearby base stations [straight under the plane] can't see the handset, what does it matter if the handset goes at full brightness to reach a distant one that can see it. The base stations respond to a signal and the spectrally 'closest' one is not the geographically closest one, but the one with the strongest signal, for whatever reason. I suppose the reason it's a problem is that if the signal is best received 20 km away, due to angles, then the handset would be detected by a circle of base stations, with a 20 km radius. So there would be a lot of them getting interference for a single handset. But then again, because the body of a plane is mostly opaque aluminium, it would be only the few basestations directly in line with a window which would see the handset. So maybe it's even a good thing that there would be maybe 20 basestations in view, because then there might, with a bit of luck, be one in line with the window and the relevant handset. Globalstar handsets would not normally work because unless right beside a window, they would be very unlikely to be able to see a satellite through a window [from a middle seat or even a window seat unless the phone is near the window]. So I don't see that cellphones [CDMA ones anyway] or Globalstar phones couldn't be used freely in an aircraft. The 'don't use phones' is usually presented as a 'safety' issue. Maybe that's fraud on the part of the airline and an easier way of getting people to do what they are told. It would be tough to tell people [and expect them to comply] that people with CDMA phones may use them, but those with dual mode phones may not [in case it's operating in analogue mode] and analogue phones may not either. Roll on CDMA and Globalstar with an external antenna on aircraft. Does that make sense? Mqurice