"Owain" wrote in message
...
nightjar cpb@ wrote:
My pilot's licence requires me to carry a spare pair when flying too. I
routinely have a spare pair in the car and carry a pair (sometimes two)
in my coat, but, with my eyesight, I would need one of the spare pairs to
find the main pair if I dropped them.

You need a miniaturised version of the old "find your keys"
whistle-activated bleeper.

I'd still need to see where the noise was coming from

Colin Bignell