ELECTRONIC DEVICES ON PLANE

Why we have to turn electronic devices off on planes??

According to regulations, which are pretty uniform around the

world, the use of portable electronic devices is not allowed below 

around 3,000m (10,000ft), even in "flight mode” which stops 

the transmission of signals. Above this height devices like 

laptops 

and music players can be used, but phones must remain off. 

These rules are important, we are told, to avoid potentially 

dangerous interference between signals from these devices and 

sensitive onboard electronic systems. The fear of interference 

comes from the fact that gadgets connect to the internet or to 

mobile phone networks using radio waves. It's not just an issue 

with mobile phones. Kindles, iPods, laptops, handheld gaming 

consoles – they all emit radio waves. If these are at frequencies 

close to those of the avionics, signals and readings could be 

corrupted. This could affect systems such as radar, 

communications and collision avoidance technology, and the 

problem is potentially magnified if gadgets are damaged and 

start emitting stronger radio waves than they should, or if 

signals from multiple devices combine.In the competitive world 

of aviation, some airlines such as Virgin Atlantic and Delta 

Airlines have started advertising the use of technologies that 

allow greater use of mobile devices on flights. 

 AeroMobile chief executive Kevin Rogers, 

enables the use of mobiles “as a roaming service just like when 

you go to a foreign country, except that in a foreign country you 

don’t need a satellite link.” Some airlines are now starting to fit 

AeroMobile equipment during production.

These systems allow you to use your phone while at cruise 

altitude, but not during take-off and landing.