Flight ID Number - What to set.
Hi, I am looking for some advice from those that will know....
Apologies if this has been covered before, but I couldn't find it using search.
We have recently had mode S transponders fitted on our fleet. There seems to be some debate as what to set in the Flight Identification window.
When the flight number and callsign are the same, it is no problem, we set XYZ7285. (Where XYZ is the 3 letter designator for our company, and 7285 is the flight number).
This in accordance with the ICAO statement:
Aircraft Identification, not exceeding 7 characters is to be entered in
item 7 of the flight plan and set in the aircraft as follows:
a) The ICAO three-letter designator for the aircraft operating
agency followed by the flight identification (e.g. KLM511,
BAW213, JTR25), when:
in radiotelephony the callsign used consists of the ICAO
telephony designator for the operating agency followed by
the flight identification (e.g. KLM 511, SPEEDBIRD 213,
HERBIE 25).
However on some flights, like most operators these days, we sometimes use alpha numeric callsigns.
In this case, we are currently instructed to enter the flight number in the FID window, even though this is NOT what we will be know as on the RT.
So in the above example: I am operating the 7285, but my callsign is XYZ 36Romeo, and I have XYZ7285 as my flight ID.
Is this correct?
So in summary, what is the correct way to set up a mode S transponder if you callsign and flight number are not the same.
How does FID appear on the radar display, and what is it used for?
Many thanks in advance,
Brisbane.