Mode C verification
Joined: Oct 1999
Aviation Qualifications: ATCO
Posts: 324
Likes: 1
From: Near VTUU or EGPX
If you were already wearing a validated squawk, which must have been issued by another unit, why would you be free-calling somebody else ?
If you wanted a service from me I would issue one of my own codes, identify you and verify your mode C irrespective of your previous code.
If you wanted a service from me I would issue one of my own codes, identify you and verify your mode C irrespective of your previous code.
Joined: Feb 2001
Posts: 1,064
Likes: 0
From: Hants, UK
If the aircraft has been handed over from a unit which is an 'approved' one for verifying Mode c (there is a list), then no further verification is not required.
You mention 'free call' which suggests it is not handed over. In that case, how will we know that the Mode c is previously verified? Therefore verification is required.
We may also ask you to 'ident' so that the computer links your squawk to the flight plan if it has not done so automatically.
All of the above is from a London Control point of view.
You mention 'free call' which suggests it is not handed over. In that case, how will we know that the Mode c is previously verified? Therefore verification is required.
We may also ask you to 'ident' so that the computer links your squawk to the flight plan if it has not done so automatically.
All of the above is from a London Control point of view.
Joined: Jul 2001
Posts: 139
Likes: 0
From: North of Birmingham by a lot
Dilly,
FCs on routine sorties validate and verify. I'm pretty sure that AWACS guys validate and verify their normal squawks too. However, on big exercises where there may be 10 - 30+ ac on freq this just isn't practical so those NATO exercise squawks ending in 00 are usually used.
PS: It is possible to do radar handovers to AWACS, but involves a lot of radios!
Regards, ADIS
FCs on routine sorties validate and verify. I'm pretty sure that AWACS guys validate and verify their normal squawks too. However, on big exercises where there may be 10 - 30+ ac on freq this just isn't practical so those NATO exercise squawks ending in 00 are usually used.
PS: It is possible to do radar handovers to AWACS, but involves a lot of radios!
Regards, ADIS
Joined: Jun 2007
Posts: 179
Likes: 0
From: at home
JATCC teach to accept the Mode C level if it has a validated squawk. IE from London Mil controller or an RAF ATCRU. If its on a 7000 or the 0000 then its a no go.
Last edited by dagowly; 28th October 2008 at 22:36.
Joined: Oct 2007
Posts: 20
Likes: 0
From: under da thumb
Calm down muppet, I think they would've gained an ident using PSR. I think a request for coordination is more likely than a clearance (sic) to VFR in class g. This thread is about verification and validation of mode C.
