On 2006-03-01, Gig 601XL Builder wrDOTgiaconaATcox.net wrote:
Some are even made during critical flight times, such as the climb after
takeoff or the final approach.

I've had personal experience of someone's phone going off.

It was just the two of us in a Grumman Cheetah. My friend was doing his
first for-real ILS in IMC. It wasn't a particularly low IFR night, bases
were probably around 800 ft or so.

He had forgotten to switch off his phone. Just as we were intercepting
the localizer, his wife calls him. Immediately, all audio is replaced by
a loud 'bip b b bip b b bip b b bip brbrbrbrbrbrbrbrbrbrbrbrbrbrbbrbr'
noise. (If you have a GSM phone and have ever had it near a radio
receiver, you'll be familiar with this noise).

I was monitoring the approach, and didn't notice any disturbance to the
loc or gs indications - merely an extremely loud and distracting sound
in the headset. I took the controls while he found the phone and shut it
off.

--
Dylan Smith, Port St Mary, Isle of Man
Flying: http://www.dylansmith.net
Oolite-Linux: an Elite tribute: http://oolite-linux.berlios.de
Frontier Elite Universe: http://www.alioth.net