The danger of using mobile phones on planes has been highlighted by a new scientific study.
A team from the US Carnegie Mellon University's department of engineering and public policy (DEPP) went on board planes flying across the country to monitor the how many calls were being made and their radio emissions not just from mobile phones but also other electronic equipment, such as laptops, mp3 players and handheld game consoles.
They found on average between one and four calls being made, with some taking place during crucial flight stages, such as landing and taking off.
Dr Bill Strauss, who led the research, said: 'We found that the risk posed by these portable devices is higher than previously believed
'These devices can disrupt normal operation of key cockpit instruments, especially Global Positioning System receivers, which are increasingly vital for safe landings.'
DEPP head Granger Morgan added: 'We feel that passenger use of portable electronic devices on aircraft should continue to be limited for the safety of all concerned.'
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