CAP 413
Radiotelephony Manual
Chapter 5 Page 3
*Used to verify the accuracy of the Mode C derived level information displayed to the
controller.
**Where selected flight level is seen to be at variance with an ATC clearance,
controllers shall not state on the frequency the incorrect SFL as observed on the
situation display. However, controllers may query the discrepancy using this
phraseology. For ATC purposes, the generic phrase 'selected level' is used to
encompass both altitude and flight level.
***Downlinked Mode S Barometric Pressure Setting data has the potential to assist
in the prevention of level busts. Where such information is available to a controller and
a discrepancy is observed between the QNH passed and that selected, a controller
should query the discrepancy.
1.3.2
The pilot must respond to SSR instructions, reading back specific settings.
Table 2
Phrase
Meaning
Squawk (code)
Set the code as instructed
Confirm squawk
Confirm the code set on the transponder
Reset squawk (code)
Reselect assigned code
Squawk Ident
Operate the special position identification
feature
Squawk Mayday
Select Emergency
Squawk Standby
Select the standby feature
Squawk Charlie
Select altitude reporting feature
Check altimeter setting and confirm (level)
Check pressure setting and confirm your
level
Stop squawk Charlie
Deselect altitude reporting
Stop squawk Charlie, wrong indication
Stop altitude report, incorrect level readout
* Confirm (level)
Check and confirm your level
** Check selected level. Cleared level is
(correct cleared level)
Check and confirm your cleared level
Confirm you are squawking assigned code
(code assigned to the aircraft by ATC)
To verify that 7500 has been set
intentionally
*** Check altimeter setting (correct
altimeter setting)
Check and confirm your altimeter setting
BIGJET 347, squawk 6411
6411, BIGJET 347
BIGJET 347, squawk ident
Squawk ident, BIGJET 347
BIGJET 347, squawk 6411 and ident
6411 and ident, BIGJET 347
BIGJET 347, confirm squawk
6411, BIGJET 347
BIGJET 347, reset squawk 6411
Resetting 6411, BIGJET 347
31 March 2011
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