What happens when I squawk 7600

[Ken White]

I was curious what happens on your screens when a plane squawks 7600. Does your system lose the data block associated with the aircraft since it no longer has a discrete code?

 

[Dugie8]

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[nabbyfan]

Enroute it starts flashing "RDOF" in the 4th line of the DataBlock. No idea for Terminal

 

[cmac88]

As for whether or not we lose the data block in the en route world eram does a decent enough job of tracking a primary target as long as there's one. You never lose a data block unless a controller purposefully gets rid of it. In the terminal world I'd imagine they get strong enough primaries in almost all of there air space to be able to track you. May be harder with older equipment though.

 

[NovemberEcho]

In my Tracon, if you were on a flight plan we still have all your normal info (callsign, altitude, ground speed) and a red RF on top. If you were originally squawking 1200 we'll see your target and a limited data block with your altitude and ground speed with the red RF. (Altitude assuming you have mode c). 7600 is radio failure, not transponder failure so all the normal info broadcast by your transponder is still there. If your transponder failed obviously we won't know you're squawking 7600.

 

[NovemberEcho]

In the terminal world I'd imagine they get strong enough primaries in almost all of there air space to be able to track you. May be harder with older equipment though.

I wish. I have massive radar blind spots in certain areas of my airspace below 4000, and for some of the smaller GA's even up to 7000 in the southwest or northwest corner.