Continuing research by the Civil Aviation Authority (CAA) has proved that mobile telephone transmissions made by airline passengers can interfere with aircraft equipment.



The tests support the existing CAA ban on the use of mobile telephones on board aircraft when the engines have started. This has been in effect since the widespread introduction of mobile telephones and was supported by initial research performed in February 2000.



The latest study found that the use of mobile telephones can adversely affect navigation and communication functions, producing significant errors on instrument displays and background noise on audio outputs.
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