getting to grips with surveillance(129)

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9 If the flight numbers are not consistent, the ATC controller informs the flight crew that the flight number is not correct and provides the traffic information again.
- The flight crew informs the ATC controller that the preceding aircraft is finally in sight. Go to the next step.
 At the time of writing the brochure, this new phraseology was not yet validated. ICAO recommendations on this new phraseology will be published in the ICAO PANS-ATM, Doc 4444 (see References).

Current VSA procedure 
Basic VSA procedure  Advanced VSA procedure 
(Green italic is specific to the basic  (Blue italic is specific to the enhanced 
procedure)  procedure) 

(Amber italic is specific to the basic and advanced procedure)

.. The flight crew achieves a visual contact with the preceding aircraft with visual information, ATSAW traffic information, and party line (transmissions from the controller and other flight crews on the frequency).
.. When the preceding is in sight, the flight crew checks the consistency between the visual contact and the ATSAW traffic information.
.. If the visual contact can be maintained, the flight crew:
o  Informs the ATC controller that the preceding aircraft with its flight number displayed on ND is in sight (e.g. PRECEDING TRAFFIC AIB1234 IN SIGHT).

o  Requests a clearance for VSA procedure. Go to the next step.

D.1.2. CLEARANCE FOR THE MAINTENANCE OF THE VISUAL SEPARATION WITH THE PRECEDING AIRCRAFT
Current VSA procedure Basic VSA procedure Advanced VSA procedure
(Green italic is specific to the basic (Blue italic is specific to the enhanced
procedure) procedure)
(Amber italic is specific to the basic and advanced procedure)
.. The ATC controller clears the flight crew:
o  To maintain a visual separation with the preceding aircraft

o  If needed, to continue on a visual approach.

.. The flight crew accepts or refuses the clearance. The flight crew can better assess the ATC clearance with ATSAW.
.. If the flight crew accepts the clearance, go to the next step.

D.1.3. MAINTENANCE OF VISUAL SEPARATION ON APPROACH

Current VSA procedure
Basic VSA procedure

Advanced VSA procedure
(Green italic is specific to the basic (Blue italic is specific to the enhanced
procedure) procedure)
(Amber italic is specific to the basic and advanced procedure)
.. The flight crew:
o  Flies the approach

o  Looks at the preceding aircraft on ND with the traffic display enabled.

o  Looks at the preceding aircraft out the window

o  Decides if a maneuver is required based on visual information or ATSAW traffic information

o Maneuvers the aircraft if required to maintain the visual separation. .. The VSA procedures ends when the preceding aircraft lands. .. If the visual contact is lost or the flight crew considers that the situation
　
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