CAP 413, Manual

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CAP 413 Radiotelephony Manual
Chapter 2 Page 8
1.7.4 The use of the calling aeronautical station’s callsign followed by the answering
aeronautical station’s callsign shall be considered the invitation to proceed with
transmission by the station calling. The use of the phrase ‘Pass your message’ may
be used when considered appropriate.
1.7.5 When satisfactory communication has been established, and provided that it will not
be confusing , the name of the location or the callsign suffix may be omitted.
1.7.6 Telephone procedures to be applied by civil controllers are published in CAP 493
(Manual of Air Traffic Services Part 1).
1.8 Callsigns for Aircraft
1.8.1 When establishing communication, an aircraft shall use the full callsigns of both
stations.
1.8.2 After satisfactory communication has been established and provided that no
confusion is likely to occur, the ground station may abbreviate callsigns (see table
below). A pilot may
only abbreviate the callsign of his aircraft if it has first been
abbreviated by the aeronautical station.
* Represents a Type C callsign.
** The name of either the aircraft manufacturer, or name of aircraft model, or name
of the aircraft category (e.g. helicopter or gyrocopter) may be used as a prefix to
the callsign.
1.8.3 An aircraft should request the service required on initial contact when freecalling a
ground station.
Borton Tower, G-ABCD, request
Basic Service
G
-ABCD, Borton Tower, pass your
message
Table 9
Full callsign Abbreviation
GBFRM G-RM
Speedbird GBGDC Speedbird DC
N31029 N029
N753DA N3DA
* Midland 640 No abbreviation
**Piper GBSZT Piper ZT
**Helicopter GABCD Helicopter CD
Westbury Approach, G-ABCD,
request Traffic Service
Wrayton Control, G-ABCD, I wish to
file an airborne flight plan
31 March 2011