CAP 413
Radiotelephony Manual
Chapter 2 Page 14
1.13.5
The controller may instruct the pilot to contact another agency on passing a specific
point or when passing, leaving or reaching a specified level.
1.13.6
Where the aircraft is transferred to another agency whilst on a radar heading, the
controller will instruct the pilot to report the radar heading to the next agency.
1.13.7
If the airspace does not dictate that an aircraft must remain in contact with a specific
ATSU and the pilot wishes to freecall another agency he should request, or notify
such an intention.
1.14
Clearance Issue and Read-back Requirements
1.14.1
Provisions governing clearances are contained in the PANS-ATM (ICAO Doc 4444). A
clearance may vary in content from a detailed description of the route and levels to
be flown to a brief standard instrument departure (SID) according to local procedures.
1.14.2
Controllers will pass a clearance slowly and clearly since the pilot needs to write it
down; wasteful repetition will thus be avoided. Whenever possible, a route clearance
should be passed to an aircraft before start up and the aircraft’s full callsign will always
be used. A route clearance and local departure instructions shall not be passed in the
same transmission. When a route clearance is passed subsequent to local departure
instructions, or to an aircraft that is already airborne, tactical restrictions that remain
in place shall be reiterated to ensure that the immediate profile to be flown by the pilot
is unambiguous.
Generally, controllers will avoid passing a clearance to a pilot
engaged in complicated taxiing manoeuvres and on no occasion when the pilot
is engaged in line up or take-off manoeuvres.
1.14.3
An ATC route clearance is
NOT
an instruction to take-off or enter an active runway.
The words 'TAKE-OFF' are used only when an aircraft is cleared for take-off. At
all other times the word 'DEPARTURE' is used.
1.14.4
The stringency of the read back requirement is directly related to the possible
seriousness of a misunderstanding in the transmission and receipt of ATC clearance
and instructions.
ATC route clearances shall always be read back unless
otherwise authorised by the appropriate ATS authority
in which case they shall
be acknowledged in a positive manner. Read backs shall always include the aircraft
callsign.
G-CD, at Littletown contact Borton
Approach 122.375
At Littletown contact Borton
Approach 122.375, G-CD
BIGJET 347, when passing FL120
contact Wrayton Control 119.725
When passing FL120 contact
Wrayton Control 119.725, BIGJET
347
BIGJET 347, report radar heading to
Wrayton Control, 116.335
Westbury, G-ABCD, request change
to Wrayton Information 125.750
Wrayton Information, G-ABCD,
changing to Wrayton Centre 121.5
for Practice Pan
17 November 2011
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