Why do you have to wait to get to a particular altitude to use electronics on a plane?

Question

I travel all the time and i dont know why they say portable electronics cant be used until you reach a certain altitude. Any help?

Answer 1

The statement that takeoff and landing are the two most dangerous times is true. It's not true, though, that electronics get turned off during this time because they emit signals that can interfere with the plane--- they don't, for the most part, or they would never allow you to turn them on at all. (Pagers do interfere with airplane navigational systems which is why they can't be on at all during flight).

Flight attendants ask you to turn off and stow these items for takeoff and landing so that you will be less distracted, in case they need to give emergency instructions. In a crash or emergency landing, every second counts. If you miss the evacuation instructions because you can't hear them, or have your iPod on and your eyes closed, you will lose precious time in an evacuation, and that could be deadly. Also these loose items can become projectiles in a crash, and fly about and hit people, and they could end up in the aisles where people may slip or trip on them during the evacuation.

Answer 2

The 2 most critical phases in a flight are takeoff and landing, during those two phases it is prohibited the use of any electronics, they do that because it is when the aircraft is sending and receiving radio, navigation signals and the use of your electronics, specially those that send and receive electromagnetic signals may interfere with the navigation system during those critical phases. If that would happen, grave and or catastrophic errors could occur.

Answer 3

there's no "lowest" it relies upon on the course. case in point, a flight from Atlanta to Macon (upkeep base yet does carry passengers) is under 10,000 feet. The max is often interior the top 30,000 selection FL (flight point) 370 or 380. the army does not have fighter airplanes. some protection stress combatants can bypass as intense because of the fact the top 50,000's in keeping with danger extra.

Answer 4

i don't think its the altitude its self, i think its after the plane reaches its cruising altitude (which varies). after the assent and the plane has leveled off. ( possibly when its put in auto pilot). if you notice they have you turn them off when you start the descent. Just a guess, Ive thought of this allot when traveling as well.