Quote:
Originally Posted by HHAS  Because of the routes we fly, various radar controls will issue us new squawk code and changes enroute.
The SOP requires us to first put the transponder on STANDBY before entering the code then back to AUTO upon entry of the new squawk code.
My question is from a controller's operational standpoint, is it neccessary to put the transponder on STANDBY or can the NEW squawk code while the transponder is transmitting |
Just going from memory, but I'd guess that SOP has more to do with the transponder than ATC.
I think one of the contributory factors in the GOL/Legacy crash in Brazil last year was that the Legacy's XPDR was in STBY. The SOP may be an attempt to encourage monitoring of the transponder and prevent repeated squawk changes from being interpreted as an RMP fault, potentially causing at least one brand of transponder to go into standby mode.