I just want to remind all mumsnetters to wave at overhead planes and helicopters - it helps the radar waves to 'catch on' to something.
It's preferable to use a long stick, and wave it on a ladder or from a tree, but your hand when you are standing on the ground works too.
Jumping is also OK - just remember to jump on the spot for about 15 seconds.
Wave every time you see a plane - even if it's just a dot in the sky.
It doesn't work when you are indoors - for that you will need to wave out of a window using a stick.