Please switch off all mobile phones, since they can interfere with the aircraft's navigation systems. At least, that's what you've always been told. The real reason to switch them off is because they interfere with mobile networks on the ground, but somehow that doesn't sound quite so good.en
In fact, do not bother to look for it [life-jacket] at all. In the event of a landing on water, an unprecedented miracle will have occurred, because in the history of aviation the number of wide-bodied aircraft that have made successful landings on water is zero.