Originally Posted by
Darwinism
I seem to remember from my early controlling days that Jet Provosts would have a tone at the end of transmissions to indicate that their gear was down - a similar thing perhaps?
You remember correctly, it was the Ultrasonic Undercarriage Position Indicator (UUPI). A triple tone at the end of the transmission. There was also the flashing white nose light that provided a visual confirmation at night.
YS