CAP 413 - Air Traffic Services Outside Controlled Airspace (ATSOCAS)

CAP 413 Radiotelephony Manual
Chapter 6 Page 26
nominated unit and is a secondary service provided at the discretion of the controller.
Therefore, when primary task loadings are high, LARS may not be available. The
service provided will be a Traffic Service or a Deconfliction Service
1.16.2 Details of ATSUs participating in the Lower Airspace Radar Service, hours of
operation and contact frequencies, are published in the UK AIP (ENR 1.6.3, Lower
Airspace Radar Service).
1.17 Air Traffic Services Outside Controlled Airspace (ATSOCAS)
1.17.1 Air Traffic Services outside Controlled Airspace (ATSOCAS) are provided by a variety
of air traffic units and are detailed within CAP 774 (UK Flight Information Services) and
in the UK AIP.
1.17.2 Pilots requiring ATSOCAS should establish RTF communication with the appropriate
ATSU using the following format:
1.17.3 Once communications have been established the pilot should pass the following
details:
a) Aircraft Callsign / Type
b) Departure Point and Destination
c) Present Position
d) Level
e) Additional details / Intention (e.g. Flight Rules, Next route point, Squawk Code)
1.17.4 When an ATSOCAS is being provided, agreements can be established between a
controller and a pilot on a short term tactical basis.
Or alternatively
Westbury Approach, G-ABCD,
request Traffic Service
G-ABCD, Westbury Approach, pass
your message
G-CD, Cessna 172, from Borton to
Walden, 15 NM South of
Westbury, altitude 2500 feet
Wessex 1008, VFR, tracking to
Wells, Squawking 7000
G-CD, for co-ordination request
maintain Flight Level 50
Maintain Flight Level 50, G-CD
Negative, G-CD
G-CD, for co-ordination request not
above Flight Level 90
Not above Flight Level 90, G-CD
31 March 2011