
CAP 413
Radiotelephony Manual
Chapter 10 Page 25
3.30
No Compass/No Gyro
If a controller observes an aircraft that does not appear to be tracking as expected for
the heading provided or notified by the pilot, the controller may suspect that the
aircraft has suffered a compass and/or gyro failure. Initially, the controller will confirm
the heading that the aircraft is following and thereafter may invoke the No Compass/
No Gyro procedure.
Once the procedure has been adopted turn instructions will be as follows:
3.31
Supersonic Flight
The phrase used to approve the commencement of a supersonic run is as follows:
Passing 8000 feet, Gauntlet 25
Passing 4000 feet, Gauntlet 25
Gauntlet 25, continue spiral, report
breaking cloud
Breaking cloud, Gauntlet 25
Gauntlet 25, approaching safety
altitude/height, aerodrome on your
left/right, report visual
Aerodrome in sight, Gauntlet 25
Gauntlet 25, continue with Markston
Tower (frequency)
(Callsign), confirm heading
(Callsign), heading (heading)
(Callsign), suspect unserviceable
compass and gyro. Adopt no
compass no gyro procedure, make
all turns rate one, start and stop
turns on the executive word now. [Is
this a practice?]
(Callsign), adopting [no compass or
no gyro] procedure, this is [not] a
practice
(Callsign), turn [left or right] now
Turning [left or right], (callsign)
(Callsign), stop turn now
Stop turn, (callsign)
Gauntlet 25, cleared to accelerate,
report supersonic and subsonic
31 March 2011
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