On the missing AirAsia Indonesia flight QZ8501

I hope in 2015 and beyond authorities should take better actions to ensure passengers' safety. For one, it is alarming to see a number of aeroplanes which have gone missing this year. I think there's something behind all that - I might be wrong but the chances of losing such a big object are very very small. If they can track a nail with satellites two metres underground, how come they cannot find an aeroplane?

Prayers for the passengers of the missing aeroplane and their families.