Originally Posted by
ScottBouch
Hi all,
What does "FI" stand for?
I used to volunteer at Cranfield on the Lightnings there, I recall a green flashing lamp on the roof of a building flashing away Morse code at night; is this the identification beacon referred to here?
This lamp was like an upturned bin, of a translucent green material, with a bright lamp inside. I imagine there may be a few types out there.
I found this online which may be related to the FI notation:
https://ppltutor.com/air-law/signals...ation_beacons/ but any advice on this is welcomed!
Cheers, Scott.
You've got it - night visual ident beacon for the airfield is a large light flashing a Morse ident. A bit like the old letter identifiers that had to be laid out horizontally for daytime VFR. Essentially useless in the 21st century though!