Mike Ash wrote:
How about
ELT for emergency location transmitter?

Works for me.

Me too. Of course this is also optional equipment in many
circumstances....


There are ELTs and ELTs...
the usual article may have a remote switch, but emits on 121.5 and 243
MHz I watched the fellow in the next hangar testing his g switch:
he replaced the battery, then swung the ELT smartly against a tire.
At 5 to the hour, naturally... There was a recent alert about stuck g
switches, I hear.

The later article features 406MHz emissions I hear. I must find out more
about them.

Brian W