CAP 413
Radiotelephony Manual
Chapter 5 Page 9
or,
NOTES:
1
An aircraft experiencing a radio communications failure is expected to select the
appropriate SSR code.
2
See also Chapter 8.
1.9
Essential Traffic Information
1.9.1
Essential traffic is traffic which is separated for any period by less than the specified
standard separation. It is normally passed in situations when ATS surveillance
systems are not available. Essential traffic information passed to an aircraft shall
include:
a) Direction of flight of conflicting aircraft;
b) Type of conflicting aircraft;
c) Cruising level of conflicting aircraft and ETA for the named reporting point, or for
aircraft passing through the level of another with less than the normal separation;
the ETA for the reporting point nearest to where the aircraft will cross levels and;
d) Any alternative clearance.
1.9.2
The controller will also advise the pilot when there is no reported traffic and may
provide a time check as required.
1.10
Danger Area Crossing Service/Danger Area Activity Information Service
1.10.1
In-flight information on the status of Danger Areas (DAs) is available from the
nominated service units:
a) listed in the UK AIP;
b) detailed on the legend of the appropriate UK 1:500 000 Aeronautical Chart.
BIGJET 347, reply not received, if
you read Wrayton squawk ident I
say again squawk ident
BIGJET 347, squawk observed 3
miles east of BTN I will continue to
pass instructions
BIGJET 347, essential traffic
information, a westbound B737
maintaining FL80 estimating KTN at
50, descend FL90
BIGJET 347, no reported traffic
BIGJET 347, time check 45
17 November 2011
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