Whilst I think about it, Explosive decompression on an aircraft operating low level off the horn of africa one crew member almost lost. Aircraft under control - sort of, no one to hear a mayday, first opportunity lets relay it!! - great idea until you realise you get the only guy on the planet who says the exact opposite of what you said to who you want it to be said to!!! May Day calls don't neccessarily do what you want them to do!!!!